DOCUMENT= 1113
DT = 05
KN = B40891202375
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3375340
002 B40891202375
010 CONFERENCE PROCEEDINGS.
100 7TH INTERNATIONAL CONFERENCE ON ION IMPLANTATION TECHNOLOGY.
300 7TH INTERNATIONAL CONFERENCE ON ION IMPLANTATION TECHNOLOGY.
305 KYOTO, JAPAN. 7-10 JUNE 1988. JAPAN SOC. APP. PHYS.. INST. ELECTR.
305 ENG. JAPAN. OKOCHI MEMORIAL FOUND.. IEE. ET AL.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 FEB. 1989. VOL.B37-38
350 ISSN 0168-583X, CODEN NIMBEU
400 THE FOLLOWING TOPICS WERE DEALT WITH: GENERAL OVERVIEWS OF ION
400 IMPLANTATION AND ION BEAM EQUIPMENT; ION BEAM SOURCES; ION BEAM
400 TRANSPORT SYSTEMS; ION BEAM INTERACTIONS WITH SOLIDS; NEW
400 IMPLANTATION EQUIPMENT AND SYSTEM TECHNIQUES; APPLICATIONS FOR NEW
400 MATERIALS AND DEVICES; VLSI AND ADVANCED MATERIALS PROCESSES;
400 IMPLANTATION IN HIGH TEMPERATURE SUPERCONDUCTORS.
500 ION BEAM APPLICATIONS; ION IMPLANTATION.
510 ION IMPLANTATION; ION BEAM EQUIPMENT; ION BEAM SOURCES; ION BEAM
510 TRANSPORT SYSTEMS; SOLIDS; VLSI; HIGH TEMPERATURE SUPERCONDUCTORS.
DOCUMENT= 1114
AUTH = MARWICK
DT = 06
KN = B40891202376
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3375341
002 B40891202376
010 CONFERENCE PAPER; EXPERIMENTAL.
100 ION IMPLANTATION IN HIGH-T/SUB C/ SUPERCONDUCTORS.
200 MARWICK, A.D.; CLARK, G.J.
220 IBM, THOMAS J. WATSON RES. LAB., YORKTOWN HEIGHTS, NY, USA
300 7TH INTERNATIONAL CONFERENCE ON ION IMPLANTATION TECHNOLOGY.
305 KYOTO, JAPAN. 7-10 JUNE 1988. JAPAN SOC. APP. PHYS.. INST. ELECTR.
305 ENG. JAPAN. OKOCHI MEMORIAL FOUND.. IEE. ET AL.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 FEB. 1989. VOL.B37-38, P.910-16, REF.24
350 ISSN 0168-583X, CODEN NIMBEU
400 THE AUTHORS DESCRIBE EFFECTS THAT OCCUR WHEN HIGH-T/SUB C/ OXIDE
400 SUPERCONDUCTORS ARE ION IMPLANTED OR IRRADIATED. MOST OF THE
400 INFORMATION HAS COME FROM STUDIES DONE WITH MEV IONS AND THIN FILMS
400 OF YBA/SUB 2/CU/SUB 3/O/SUB 7/, AND MANY OF THE CHANGES ARE DUE TO
400 RADIATION DAMAGE. SMALL ION DOSES INTRODUCE DEFECTS WHICH ARE MOBILE,
400 AND ANNEAL AT ROOM TEMPERATURE. AT HIGH DOSE THE MATERIALS ARE NO
400 LONGER SUPERCONDUCTORS, AND THE EFFECTS SEEN WITH INCREASING ION
400 FLUENCE ARE A REDUCTION IN THE NORMAL-STATE CONDUCTIVITY, WHICH FALLS
400 EXPONENTIALLY WITH DOSE, AND A METAL TO SEMICONDUCTOR TRANSITION.
400 THESE CAN BE VIEWED AS CONSEQUENCES OF INCREASING LOCALIZATION OF THE
400 CHARGE CARRIERS. AT STILL HIGHER DOSES A CRYSTALLINE-TO-AMORPHOUS
400 TRANSITION OCCURS. SOME PROGRESS IN ION-IMPLANTATION PROCESSING OF
400 SUPERCONDUCTING THIN FILMS HAS BEEN MADE, IN PARTICULAR IN PATTERNING
400 THE FILMS WITH HIGH IMPLANT DOSES.
500 AMORPHISATION; CRYSTAL DEFECTS; HIGH-TEMPERATURE SUPERCONDUCTORS; ION
500 IMPLANTATION; METAL-INSULATOR TRANSITION; SUPERCONDUCTING THIN FILMS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; CARRIER LOCALISATION; RADIATION
510 DAMAGE; DEFECTS; METAL TO SEMICONDUCTOR TRANSITION;
510 CRYSTALLINE-TO-AMORPHOUS TRANSITION; ION-IMPLANTATION;
510 SUPERCONDUCTING THIN FILMS; YBA/SUB 2/CU/SUB 3/O/SUB 7/.
550 YBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS.
DOCUMENT= 1115
AUTH = MEYER
DT = 06
KN = B40891202377
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3375342
002 B40891202377
010 CONFERENCE PAPER; EXPERIMENTAL.
100 EPITAXIAL GROWTH OF YBA/SUB 2/CU/SUB 3/O/SUB 7/ THIN FILMS AND THE
100 INFLUENCE OF ION IRRADIATION ON THE TRANSPORT PROPERTIES.
200 MEYER, O.; EGNER, B.; GEERK, J.; GERBER, R.; LINKER, G.;
200 WESCHENFELDER, X.X.XI; XIONG, G.C.
220 KERNFORSCHUNGSZENTRUM KARLSRUHE, INST. FUR NUKLEARE FESTKORPERPHYS.,
220 KARLSRUHE, WEST GERMANY
300 7TH INTERNATIONAL CONFERENCE ON ION IMPLANTATION TECHNOLOGY.
305 KYOTO, JAPAN. 7-10 JUNE 1988. JAPAN SOC. APP. PHYS.. INST. ELECTR.
305 ENG. JAPAN. OKOCHI MEMORIAL FOUND.. IEE. ET AL.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 FEB. 1989. VOL.B37-38, P.917-22, REF.20
350 ISSN 0168-583X, CODEN NIMBEU
400 THIN SUPERCONDUCTING FILMS OF YBA/SUB 2/CU/SUB 3/O/SUB 7/ HAVE BEEN
400 DEPOSITED ON AL/SUB 2/O/SUB 3/, ZRO/SUB 2/ AND SRTIO/SUB 3/
400 SUBSTRATES BY MAGNETRON SPUTTERING. HE ION CHANNELING REVEALED A
400 SINGLE CRYSTALLINE, STRAIN-FREE GROWTH OF THE TETRAGONAL AS WELL AS
400 OF THE ORTHORHOMBIC PHASE ON (100) SRTIO/SUB 3/. FOR THE ORTHORHOMBIC
400 PHASE THE C-AXIS IS PERPENDICULAR TO THE SUBSTRATE SURFACE, AND THE
400 STANDARD DEVIATION OF MISORIENTED REGIONS WITH RESPECT TO THE
400 SUBSTRATE ORIENTATION IS ABOUT 0.2 DEGREES . THE CRITICAL CURRENT OF
400 THESE FILMS AS DETERMINED ON NARROW BRIDGES PRODUCED BY ION
400 IRRADIATION IS ABOUT 2.4*10/SUP 6/ A/CM/SUP 2/ AT 77 K. IRRADIATION
400 OF THESE BRIDGES WITH PROTONS AND AR IONS LEADS TO A RAPID DECREASE
400 OF THE CRITICAL CURRENT. THE IRRADIATION INDUCED CHANGES OF THE
400 TRANSPORT PROPERTIES IN THIS CLASS OF MATERIALS CAN MAINLY BE
400 ATTRIBUTED TO A METAL TO SEMICONDUCTOR PHASE TRANSFORMATION.
500 BARIUM COMPOUNDS; CRITICAL CURRENTS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; ION BEAM EFFECTS; METAL-INSULATOR TRANSITION;
500 SPUTTERED COATINGS; SUPERCONDUCTING THIN FILMS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; THIN FILMS; ION IRRADIATION;
510 MAGNETRON SPUTTERING; ORTHORHOMBIC PHASE; CRITICAL CURRENT; METAL TO
510 SEMICONDUCTOR PHASE TRANSFORMATION; YBA/SUB 2/CU/SUB 3/O/SUB 7/.
550 YBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS.
DOCUMENT= 1116
AUTH = WHITE
DT = 06
KN = B40891202378
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3375343
002 B40891202378
010 CONFERENCE PAPER; EXPERIMENTAL.
100 IMPLANTATION, DAMAGE, AND REGROWTH OF HIGH T/SUB C/ SUPERCONDUCTORS.
200 WHITE, A.E.; SHORT, K.T.; GARNO, J.P.; VALLES, J.M.; DYNES, R.C.;
200 SCHNEEMEYER, L.F.; WASZCZAK, J.; LEVI, A.F.J.; ANZLOWAR, M.; BALDWIN,
200 K.W.
220 AT?T BELL LABS., MURRAY HILL, NJ, USA
300 7TH INTERNATIONAL CONFERENCE ON ION IMPLANTATION TECHNOLOGY.
305 KYOTO, JAPAN. 7-10 JUNE 1988. JAPAN SOC. APP. PHYS.. INST. ELECTR.
305 ENG. JAPAN. OKOCHI MEMORIAL FOUND.. IEE. ET AL.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 FEB. 1989. VOL.B37-38, P.923-9, REF.16
350 ISSN 0168-583X, CODEN NIMBEU
400 THE AUTHORS HAVE OBSERVED SUPERCONDUCTIVITY IN THIN FILMS OF (LA/SUB
400 1-X/SR/SUB X/)/SUB 2/CUO/SUB Y/ WHICH ARE FABRICATED BY IMPLANTING
400 EVAPORATED LA/CU MULTILAYER FILMS WITH SR AND ANNEALING IN OXYGEN.
400 THE FILMS ARE INSULATING AND PARTIALLY TRANSPARENT AS-IMPLANTED, BUT
400 THEY DARKEN AND BECOME CONDUCTING AT ANNEALING TEMPERATURES AS LOW AS
400 500 DEGREES C. THE RESISTANCE BEHAVIOR IS VERY SENSITIVE TO THE
400 ANNEALING CONDITIONS AND THE SUPERCONDUCTING LAYER APPEARS TO BE
400 BURIED BENEATH THE SURFACE. SIMILARLY, IMPLANTATION OF F, O, AND NE
400 INTO SINGLE CRYSTALS AND HIGH QUALITY ( CHI /SUB MIN/<30%) THIN FILMS
400 OF YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / CREATES A BURIED DAMAGE LAYER
400 AND RENDERS THE FILMS INSULATING. FROM RUTHERFORD BACKSCATTERING AND
400 CHANNELING ANALYSIS, IT IS FOUND THAT SOME REGROWTH OF THE DAMAGED
400 LAYER DOES OCCUR ON SUBSEQUENT ANNEALING. STUDIES OF THE TRANSPORT
400 PROPERTIES OF THESE FILMS AS A FUNCTION OF MEV-ION-BEAM-INDUCED
400 DAMAGE SHOW THAT THE CRITICAL CURRENT CAN BE CONTROLLABLY REDUCED AT
400 LOW FLUENCES. THE METAL-TO-INSULATOR TRANSITION, WHICH OCCURS AT
400 HIGHER FLUENCES, SEEMS TO RESULT FROM A REDUCTION IN CARRIER MOBILITY
400 RATHER THAN CARRIER FREEZE-OUT.
500 CHANNELLING; CRITICAL CURRENTS; HIGH-TEMPERATURE SUPERCONDUCTORS; ION
500 IMPLANTATION; LANTHANUM COMPOUNDS; METAL-INSULATOR TRANSITION;
500 RUTHERFORD BACKSCATTERING; STRONTIUM COMPOUNDS; SUPERCONDUCTING THIN
500 FILMS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; ION IMPLANTATION; DAMAGE; THIN
510 FILMS; ANNEALING; RUTHERFORD BACKSCATTERING; CHANNELING ANALYSIS;
510 REGROWTH; CRITICAL CURRENT; METAL-TO-INSULATOR TRANSITION; CARRIER
510 MOBILITY; (LA/SUB 1-X/SR/SUB X/)/SUB 2/CUO/SUB Y/.
550 LASRCUO/SS CU/SS LA/SS SR/SS O/SS.
DOCUMENT= 1117
AUTH = YAMANISH
DT = 06
KN = B40891202379
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3375344
002 B40891202379
010 CONFERENCE PAPER; EXPERIMENTAL.
100 SYNTHESIS OF SUPERCONDUCTING Y-BA-CU-O THIN FILMS BY IONIZED CLUSTER
100 BEAM CODEPOSITION.
200 YAMANISHI, K.; YASUNAGA, S.; KAWAGOE, Y.; SATO, K.; IMADA, K.
220 MITSUBISHI ELECTRIC CORP., HYOGO, JAPAN
300 7TH INTERNATIONAL CONFERENCE ON ION IMPLANTATION TECHNOLOGY.
305 KYOTO, JAPAN. 7-10 JUNE 1988. JAPAN SOC. APP. PHYS.. INST. ELECTR.
305 ENG. JAPAN. OKOCHI MEMORIAL FOUND.. IEE. ET AL.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 FEB. 1989. VOL.B37-38, P.930-4, REF.7
350 ISSN 0168-583X, CODEN NIMBEU
400 THE TECHNIQUE OF IONIZED CLUSTER BEAM (ICB) DEPOSITION IS VERY
400 EFFECTIVE IN SYNTHESIZING HIGH-TEMPERATURE SUPERCONDUCTING THIN
400 FILMS, BECAUSE OF ITS KINETIC ENERGY AND ELECTRIC CHARGES. AN ICB
400 CODEPOSITION WITH MULTIPLE SOURCES WAS USED TO CONTROL THE
400 COMPOSITION RATIO AND THE CRYSTAL STRUCTURE OF THE FILMS BY
400 CONTROLLING THE INTENSITY, THE KINETIC ENERGY AND THE IONIZATION
400 RATIO OF EACH CLUSTER BEAM INDEPENDENTLY. SUPERCONDUCTING Y-BA-CU-O
400 FILMS WERE OBTAINED BY A COMBINED METHOD OF CODEPOSITION OF Y, BA AND
400 CU, AND POSTANNEALING IN AN OXYGEN ATMOSPHERE. THE FILMS WERE
400 DEPOSITED IN A VACUUM CHAMBER WITH A PRESSURE BELOW 1.3*10/SUP -3/ PA
400 WITHOUT INTENTIONAL HEATING OF SUBSTRATES. THE CHARACTERISTICS OF THE
400 FILMS SUCH AS THE TRANSITION TEMPERATURE TO ZERO-RESISTANCE STATE
400 (T/SUB C,ZERO/) DEPEND MAINLY ON THE ACCELERATION VOLTAGE WHICH
400 DETERMINES THE KINETIC ENERGY OF THE IONIZED CLUSTERS. FILMS WITH
400 T/SUB C,ZERO/ ABOVE 77 K WERE SYNTHESIZED WITH AN ACCELERATION
400 VOLTAGE OF 0.5 KV. SUPERCONDUCTING Y-BA-CU-O FILMS WITH T/SUB C,ZERO/
400 OF 70 K WERE ALSO SYNTHESIZED BY CODEPOSITION IN OXYGEN GAS WITHOUT
400 POSTANNEALING.
500 BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; ION BEAM EFFECTS; SUPERCONDUCTING
500 THIN FILMS; SUPERCONDUCTING TRANSITION TEMPERATURE; VAPOUR
500 DEPOSITION; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; IONIZED CLUSTER BEAM CODEPOSITION;
510 THIN FILMS; CRYSTAL STRUCTURE; TRANSITION TEMPERATURE; Y-BA-CU-O.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1118
AUTH = CASPARY
DT = 02
KN = B40891203645
LG = ENGL
SN = ISSN 0302-072X
YR = 89
000 3376610
002 B40891203645
010 JOURNAL PAPER; EXPERIMENTAL.
100 LOW-TEMPERATURE SPECIFIC HEAT IN HIGH MAGNETIC FIELD OF BI/SUB
100 2/SR/SUB 2/CACU/SUB 2/O/SUB 8/.
200 CASPARY, R.; HOHR, A.; SPILLE, H.; STEGLICH, F. / SCHMIDT, H.;
200 AHRENS, R.; ROTH, G.; RIETSCHEL, H.; YAN, Y.F.; ZHAO, Z.X.
220 INST. FUR FESTKORPERPHYS., TECH. HOCHSCHULE, DARMSTADT, WEST GERMANY
310 EUROPHYS. LETT. (SWITZERLAND)
330 1 APRIL 1989. VOL.8, NO.7, P.639-43, REF.16
350 ISSN 0302-072X, CODEN EULEEJ
400 THE SPECIFIC HEAT C(T) OF BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB 8/ WAS
400 MEASURED AT 80 MK90 K, SUPERCONDUCTIVITY IN YBA/SUB
400 2/CU/SUB 3/O/SUB 7- DELTA / SAMPLES WAS OBSERVED FROM RESISTIVITY AND
400 MAGNETIC SUSCEPTIBILITY MEASUREMENTS. THE ZERO-FIELD-COOLED
400 SUSCEPTIBILITY OF THE MATERIAL WAS 60 TO 100% OF THE IDEAL
400 DIAMAGNETIC VALUE DEPENDING ON SAMPLE PREPARATION. STRUCTURE
400 IDENTIFICATION BY X-RAY DIFFRACTION AT BOTH 293 AND 89 K EXHIBITED
400 THE SAME ORTHORHOMBIC STRUCTURE. SCANNING TUNNELLING MICROSCOPE
400 INVESTIGATIONS OF THE SAMPLE SURFACE REVEALED STEEP STEP STRUCTURE
400 WITH 10*10 NM/SUP 2/ SIZE CRYSTALLITES AND 5 TO 100 NM HIGH TERRACES.
400 TEMPERATURE CYCLING BETWEEN 77 AND 293 K SOMETIMES LED TO THE
400 APPEARANCE OF WHITE BARIUM LUMPS ON THE SURFACE AND IN THE BULK OF
400 THE SAMPLE CAUSING THE TRANSITION TO THE LOW RESISTANCE STATE AT 90 K
400 TO DISAPPEAR.
500 BARIUM COMPOUNDS; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE
500 SEMICONDUCTORS AND INSULATORS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 MAGNETIC SUSCEPTIBILITY; SCANNING TUNNELLING MICROSCOPY;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; SURFACE STRUCTURE; X-RAY
500 DIFFRACTION EXAMINATION OF MATERIALS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; SCANNING TUNNELLING MICROSCOPY;
510 STM; TEMPERATURE CYCLING; RESISTIVITY; MAGNETIC SUSCEPTIBILITY;
510 ZERO-FIELD-COOLED SUSCEPTIBILITY; SAMPLE PREPARATION; X-RAY
510 DIFFRACTION; ORTHORHOMBIC STRUCTURE; SURFACE; STEEP STEP STRUCTURE;
510 CRYSTALLITES; TERRACES; 90 K; 77 TO 293 K; 293 K; 89 K; YBA/SUB
510 2/CU/SUB 3/O/SUB 7- DELTA /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 9.0 E+01 K; TEMPERATURE 7.7 E+01 TO 2.93 E+02 K;
560 TEMPERATURE 2.93 E+02 K; TEMPERATURE 8.9 E+01 K.
DOCUMENT= 1130
AUTH = BYEONG-J
DT = 02
KN = B40891204178
LG = ENGL
SN = ISSN 0002-7820
YR = 89
000 3377143
002 B40891204178
010 JOURNAL PAPER; THEORETICAL.
100 CALCULATION OF PHASE DIAGRAMS FOR THE YO/SUB 1.5/-BAO-CUO/SUB X/
100 SYSTEM.
200 BYEONG-JOO LEE; DONG NYUNG LEE
220 DEPT. OF METALL. ENG., SEOUL NAT. UNIV., SOUTH KOREA
310 J. AM. CERAM. SOC. (USA)
330 FEB. 1989. VOL.72, NO.2, P.314-19, REF.9
350 ISSN 0002-7820, CODEN JACTAW
400 THE THERMODYNAMIC DATA FOR THE YO/SUB 1.5/-BAO, BAO-CUO/SUB X/, AND
400 YO/SUB 1.5/-CUO/SUB X/ QUASI-BINARY SYSTEMS WERE OPTIMIZED FROM
400 EXPERIMENTAL PHASE DIAGRAMS. THEY WERE USED TO CALCULATE TENTATIVE
400 PHASE DIAGRAMS FOR THE YO/SUB 1.5/-BAO-CUO/SUB X/ QUASI-TERNARY
400 SYSTEM. THE EQUILIBRIUM LIQUIDUS SURFACE AND THE ISOTHERMAL SECTIONS
400 OF THE TERNARY SYSTEM AT 900 DEGREES , 925 DEGREES , 950 DEGREES ,
400 975 DEGREES , AND 1000 DEGREES C WERE CALCULATED. THE ISOPLETHS
400 CONTAINING YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / WERE ALSO CALCULATED.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; PHASE DIAGRAMS;
500 PHASE EQUILIBRIUM; THERMODYNAMIC PROPERTIES; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; PHASE DIAGRAMS; THERMODYNAMIC
510 DATA; QUASI-TERNARY SYSTEM; EQUILIBRIUM LIQUIDUS SURFACE; ISOTHERMAL
510 SECTIONS; ISOPLETHS; 900 TO 1000 DEGC; YO/SUB 1.5/-BAO-CUO/SUB X/
510 SYSTEM.
550 YO1.5BAOCUO/SS O1.5/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 1.17 E+03 TO 1.27 E+03 K.
DOCUMENT= 1131
AUTH = HANUZA
DT = 02
KN = B40891204205
LG = ENGL
SN = ISSN 0022-2860
YR = 89
000 3377170
002 B40891204205
010 JOURNAL PAPER; EXPERIMENTAL.
100 VIBRATIONAL PROPERTIES OF THE YBA/SUB 2/CU/SUB 3/O/SUB 7-X/
100 SUPERCONDUCTOR. I. INFRARED AND RAMAN SCATTERING SPECTRA: LIBRATIONAL
100 MECHANISM OF SUPERCONDUCTIVITY.
200 HANUZA, J.; KLAMUT, J.; HORYN, R.; JEZOWSKA-TRZEBIATOWSKA, B.
220 INST. FOR LOW TEMP. ? STRUCTURE RES., POLISH ACAD. OF SCI., WROCLAW,
220 POLAND
310 J. MOL. STRUCT. (NETHERLANDS)
330 FEB. 1989. VOL.193, P.57-72, REF.31
350 ISSN 0022-2860, CODEN JMOSB4
400 INFRARED ABSORPTION AND REFLECTANCE SPECTRA AS WELL AS RAMAN
400 SCATTERING SPECTRA OF YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ HAVE BEEN
400 MEASURED AT TEMPERATURES ABOVE AND BELOW THE CRITICAL POINT. THE
400 RESULTS ARE COMPARED TO THOSE OBTAINED FOR PURE SUBSTRATES. THE
400 VIBRATIONAL PROPERTIES OF THE POLYMERIC COPPER-OXYGEN SYSTEM ARE
400 DISCUSSED IN TERMS OF FACTOR GROUP ANALYSIS FOR THE TETRAGONAL AND
400 ORTHORHOMBIC STRUCTURE OF THE UNIT CELL. THE ROLE OF
400 LIBRATIONAL-ROTATIONAL MODES IN THE SUPERCONDUCTION TRANSITION IS
400 DISCUSSED. THE MECHANISM OF SUPERCONDUCTIVITY ON YBA/SUB 2/CU/SUB
400 3/O/SUB 7-X/ IS PROPOSED BASED ON THE ELECTRON-LIBRON COUPLING.
500 CRITICAL POINTS; CRYSTAL MORPHOLOGY; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; INFRARED SPECTRA OF INORGANIC SOLIDS; RAMAN SPECTRA
500 OF INORGANIC SOLIDS; SUPERCONDUCTING TRANSITION TEMPERATURE; YTTRIUM
500 COMPOUNDS.
510 SUPERCONDUCTOR; RAMAN SCATTERING SPECTRA; LIBRATIONAL MECHANISM OF
510 SUPERCONDUCTIVITY; REFLECTANCE SPECTRA; CRITICAL POINT; PURE
510 SUBSTRATES; VIBRATIONAL PROPERTIES; POLYMERIC COPPER-OXYGEN SYSTEM;
510 FACTOR GROUP ANALYSIS; TETRAGONAL; ORTHORHOMBIC STRUCTURE; UNIT CELL;
510 LIBRATIONAL-ROTATIONAL MODES; SUPERCONDUCTION TRANSITION;
510 ELECTRON-LIBRON COUPLING; YBA/SUB 2/CU/SUB 3/O/SUB 7-X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1132
AUTH = BRAZOVSK
DT = 02
KN = B40891204305
LG = ENGL
SN = ISSN 0370-274X
YR = 88
000 3377270
002 B40891204305
010 JOURNAL PAPER; THEORETICAL.
100 POSSIBLE SUPERCONDUCTIVITY AT THE SURFACE OF A CONTACT OF INSULATING
100 LA/SUB 2/CUO/SUB 4/.
200 BRAZOVSKII, S.A.; YAKOVENKO, V.M.
220 L.D. LANDAU INST. OF THEOR. PHYS., ACAD. OF SCI., USSR
310 PIS'MA ZH. EKSP. TEOR. FIZ. (USSR)
330 10 AUG. 1988. VOL.48, NO.3, P.159-61, REF.5
331 ENGLISH TRANSLATION: JETP LETT. (USA). 10 AUG. 1988. VOL.48, NO.3,
331 P.172-5. CODEN JTPLA2. ISSN 0021-3640
350 ISSN 0370-274X, CODEN PZETAB
400 AN EXCESS ELECTRIC CHARGE CAN BE INDUCED BY A FIELD OR A SCHOTTKY
400 CONTACT AT THE SURFACE OF A SUBSTANCE SUCH AS INSULATING LA/SUB
400 2/CUO/SUB 4/. IT MAY BE POSSIBLE TO OBSERVE A SUPERCONDUCTIVITY IN A
400 TWO-DIMENSIONAL SYSTEM PRODUCED IN THIS MANNER.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; MOTT HUBBARD ANTIFERROMAGNETIC
510 INSULATOR; SUPERCONDUCTIVITY; EXCESS ELECTRIC CHARGE; FIELD; SCHOTTKY
510 CONTACT; TWO-DIMENSIONAL SYSTEM; INSULATING LA/SUB 2/CUO/SUB 4/.
550 LA2CUO4/SUR LA2/SUR CU/SUR LA/SUR O4/SUR O/SUR LA2CUO4/SS LA2/SS
550 CU/SS LA/SS O4/SS O/SS.
DOCUMENT= 1133
AUTH = ALEKSASH
DT = 02
KN = B40891204306
LG = ENGL
SN = ISSN 0370-274X
YR = 88
000 3377271
002 B40891204306
010 JOURNAL PAPER; EXPERIMENTAL.
100 CHARACTERISTIC FEATURES OF THE MAGNETIC STATE OF CU-O CHAINS IN
100 YBA/SUB 2/CU/SUB 3/O/SUB 6.0+X/.
200 ALEKSASHIN, B.A.; BOGDANOVICH, A.M.; VERKHOVSKII, S.V.; ZHDANOV,
200 YU.I.; KOZHEVNIKOV, V.L.; MIKHALEV, K.N.; OKULOVA, K.A.; ROMANYUKHA,
200 A.A.; SERIKOV, V.V.; SORKIN, A.M.; TSURIN, V.A.; CHESHNITSKII, S.M.;
200 SHVACHKO, YU.A.; ANISIMOV, V.I.; KATSNEL'SON, M.I.; LIKHTENSHTEIN,
200 A.I.; TREFILOV, A.V.; TURZHEVSKII, S.A.
220 INST. OF METAL PHYS., ACAD. OF SCI., SVERDLOVSK, USSR
310 PIS'MA ZH. EKSP. TEOR. FIZ. (USSR)
330 10 SEPT. 1988. VOL.48, NO.5, P.263-6, REF.16
331 ENGLISH TRANSLATION: JETP LETT. (USA). 10 SEPT. 1988. VOL.48, NO.5,
331 P.289-93. CODEN JTPLA2. ISSN 0021-3640
350 ISSN 0370-274X, CODEN PZETAB
400 THE CHANGE IN THE STATE OF CU ATOMS IN YBA/SUB 2/CU/SUB 3/O/SUB
400 6.0+X/(0.05OR=BA>OR=20 AT.%, 40 AT.% >OR=Y>OR=12.5 AT.%
400 AND 67.5 AT.%>OR=CU>OR=30 AT.% EXHIBITED SUPERCONDUCTIVITY AT ABOVE
400 77 K. THE HIGHEST J/SUB C/ (AT 77 K, ZERO FIELD) OF 680 A CM/SUP -2/
400 WAS ATTAINED FOR THE FILAMENT WITH COMPOSITION OF Y/SUB 1/BA/SUB
400 2/CU/SUB 3/ OXIDE. LONG FILAMENTS OF (ER/SUB X/Y/SUB 1-X/)/SUB
400 1/BA/SUB 2/CU/SUB 3/ OXIDE WERE EXAMINED TO PREVENT THE GENERATION OF
400 THE INSULATING PHASE. THE CRITICAL CURRENTS OF ER/SUB 0.7/Y/SUB
400 0.3/BA/SUB 2/CU/SUB 3/ OXIDE AND ER/SUB 0.8/Y/SUB 0.2/BA/SUB 2/CU/SUB
400 3/ OXIDE FILAMENTS WERE HIGHER THAN THOSE PREDICTED BY A LINEAR
400 FUNCTION OF THE J/SUB C/ OF Y/SUB 1/BA/SUB 2/CU/SUB 3/ OXIDE AND
400 ER/SUB 1/BA/SUB 2/CU/SUB 3/ OXIDE FILAMENTS.
500 BARIUM COMPOUNDS; CRITICAL CURRENT DENSITY (SUPERCONDUCTIVITY);
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SINTERING; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; CRITICAL CURRENT DENSITY; FILAMENT;
510 SUSPENSION SPINNING; LIQUID-PHASE SINTERING; DENSIFICATION;
510 Y-BA-CU-O; ER-BA-CU-O.
550 ERBACUO/SS BA/SS CU/SS ER/SS O/SS; YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1157
AUTH = SHI
DT = 02
KN = B40891205172
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378137
002 B40891205172
010 JOURNAL PAPER; EXPERIMENTAL.
100 PREPARATION OF YBACUO FILMS BY DC MAGNETRON SPUTTERING.
200 SHI, W.; SUN, J.; LIU, L.; ZH QI
220 INST. OF SOLID STATE PHYS., ACAD. SINICA, HEFEI, CHINA
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.312-15, REF.7
350 ISSN 0953-2048
400 YBCO THIN FILMS WITH CRITICAL TEMPERATURES ABOVE 83 K HAVE BEEN
400 SUCCESSFULLY PREPARED BY DC MAGNETRON SPUTTERING. CONTROL OF THE
400 PARAMETERS DURING THE SPUTTERING DEPOSITION PROCESS IS VERY IMPORTANT
400 FOR OBTAINING HIGH-T/SUB C/ FILMS. THE SPATIAL DISTRIBUTION OF Y, BA
400 AND CU DEPOSITED ON ZRO/SUB 2/ AT AMBIENT TEMPERATURE AND AT 670
400 DEGREES C WERE INVESTIGATED BY ELECTRON BEAM MICROPROBE ANALYSIS. DUE
400 TO THE EXISTENCE OF O ANIONS, THERE IS A RE-SPUTTERING PHENOMENON
400 DURING THE DEPOSITION PROCESS, SO THAT AN ABRUPT CHANGE IN
400 COMPOSITION MAY BE OBSERVED IN THE DEPOSIT. THE INFLUENCE OF THE
400 SUBSTRATE TEMPERATURE ON THE STRUCTURE AND PROPERTIES OF FILMS WAS
400 STUDIED. THE FILM DEPOSITED ON THE SUBSTRATE AT 670 DEGREES C WITH C
400 AXIS ORIENTATION HAS A CRITICAL TRANSITION TEMPERATURE ABOVE 78.5 K.
500 BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 ELECTRON PROBE ANALYSIS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 SPUTTERING; SUPERCONDUCTING THIN FILMS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; DC MAGNETRON SPUTTERING; THIN
510 FILMS; CRITICAL TEMPERATURES; ELECTRON BEAM MICROPROBE ANALYSIS;
510 STRUCTURE; YBACUO.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1158
AUTH = CUI-YING
DT = 02
KN = B40891205173
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378138
002 B40891205173
010 JOURNAL PAPER; EXPERIMENTAL.
100 A STUDY OF THE CORRELATION BETWEEN DIAMAGNETISM AND MICROSTRUCTURE OF
100 GRANULAR YBA/SUB 2/CU/SUB 3/O/SUB X/ BY ELECTRON MICROSCOPY.
200 CUI-YING YANG
220 INST. OF PHYS., CHINESE ACAD. OF SCI., BEIJING, CHINA
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.316-18, REF.5
350 ISSN 0953-2048
400 THE DIAMAGNETISM OF VARIOUS GRANULAR SAMPLES OF YBA/SUB 2/CU/SUB
400 3/O/SUB X/ HAS BEEN STUDIED BY SHADOW ELECTRON MICROSCOPY. THE
400 MICROSTRUCTURES OF THE SAMPLES HAVE BEEN OBSERVED BY SCANNING
400 ELECTRON MICROSCOPY. THE AUTHOR HAS FOUND THAT THE SAMPLE WITH LARGE,
400 ANGULAR (ORTHORHOMBIC) GRAINS ABOUT 40 MU M IN SIZE AND LOCAL TEXTURE
400 SHOWS A SIGNIFICANT MEISSNER EFFECT, WHICH APPEARS AS LARGE CYCLOIDS
400 IN THE SHADOW IMAGE AT TEMPERATURES BELOW T/SUB C/. THE SAMPLE WITH
400 SMALLER GRAINS, OF SIZE ABOUT 20 MU M, AND RANDOMLY ORIENTED ANGULAR
400 GRAINS SHOWS A SMALLER EFFECT. NO MEISSNER EFFECT IS FOUND IN THE
400 SAMPLES CONTAINING ROUND PARTICLES AND GRAINS.
500 BARIUM COMPOUNDS; CRYSTAL MICROSTRUCTURE; DIAMAGNETIC PROPERTIES OF
500 SUBSTANCES; HIGH-TEMPERATURE SUPERCONDUCTORS; MEISSNER EFFECT;
500 SCANNING ELECTRON MICROSCOPE EXAMINATION OF MATERIALS; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; DIAMAGNETISM; MICROSTRUCTURE;
510 SHADOW ELECTRON MICROSCOPY; SCANNING ELECTRON MICROSCOPY; MEISSNER
510 EFFECT; YBA/SUB 2/CU/SUB 3/O/SUB X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1159
AUTH = DESHMUKH
DT = 02
KN = B40891205174
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378139
002 B40891205174
010 JOURNAL PAPER; EXPERIMENTAL.
100 ARF LASER-INDUCED EMISSION FROM HIGH-T/SUB C/ SUPERCONDUCTING (123)
100 THIN FILMS DEPOSITED BY ARF LASER ABLATION.
200 DESHMUKH, S.; ROTHE, E.W. / RECK, G.P.; KUSHIDA, T.; ZAI GUI XU
220 DEPT. OF CHEM. ENG., WAYNE STATE UNIV., DETROIT, MI, USA
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.319-23, REF.12
350 ISSN 0953-2048
400 A 193 NM EXCIMER LASER IS USED TO DEPOSIT THIN FILMS OF Y-BA-CU-O ON
400 SAPPHIRE. THESE FILMS ARE SUBSEQUENTLY ANNEALED TO BE HIGH-T/SUB C/
400 SUPERCONDUCTING. SPECTRAL ANALYSIS OF A 193 NM LASER-INDUCED PLUME
400 FROM BULK, NON-SUPERCONDUCTING AND SUPERCONDUCTING FILMS OF Y-BA-CU-O
400 AS WELL AS FROM BAO, CUO AND Y/SUB 2/O/SUB 3/ LEADS TO THE CONCLUSION
400 THAT THE EMISSIONS ARE FROM SIMPLE ATOMIC AND DIATOMIC SPECIES. THE
400 OBSERVATIONS ADD WEIGHT TO A RECENT SUGGESTION THAT IN SITU
400 OBSERVATION OF THE EMISSION SPECTRA FROM THE LASER-INDUCED PLUMES
400 MIGHT BE USED AS A MONITOR OF FILM PROPERTIES. A SUBTLE DIFFERENCE
400 BETWEEN THE EMISSIONS FROM BULK, ANNEALED AND UNANNEALED FILMS IS
400 OBSERVED.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; LASER BEAM
500 EFFECTS; SUPERCONDUCTING THIN FILMS; VISIBLE SPECTRA OF INORGANIC
500 SOLIDS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; LASER-INDUCED EMISSION; THIN FILMS;
510 ARF LASER ABLATION; EXCIMER LASER; Y-BA-CU-O.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1160
AUTH = NEDKOV
DT = 02
KN = B40891205175
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378140
002 B40891205175
010 JOURNAL PAPER; EXPERIMENTAL.
100 AC SUSCEPTIBILITY OF MONOVALENT METAL SUBSTITUTED HIGH-T/SUB C/
100 SUPERCONDUCTING OXIDES.
200 NEDKOV, I.; ILIEV, I.; TINCHEV, S.; TASLAKOV, M.; KOJUCHAROV, V.
220 INST. OF ELECTRON., BULGARIAN ACAD. OF SCI., SOFIA, BULGARIA
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.324-5, REF.6
350 ISSN 0953-2048
400 THE AC MAGNETIC SUSCEPTIBILITY OF THE POLYCRYSTALLINE COMPOSITIONS
400 WITH FORMULA YBA/SUB 2/CU/SUB 3.5-X/M/SUB X/O/SUB 7/ AND BI/SUB
400 2/(CASR/SUB 2/M/SUB Y/)CU/SUB 2-Y/O/SUB 8/, WHERE X=0.7, Y=0.4 AND
400 M=LI, NA OR K, HAS BEEN STUDIED. INVESTIGATIONS SHOW AN INFLUENCE ON
400 THE SUSCEPTIBILITY IN M/SUP +/ SUBSTITUTED Y AND BI OXIDE SYSTEMS AND
400 OFFER A METHOD FOR CONTROL OF THE CU/SUP 3+//CU/SUP 2+/ RATIO.
500 BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC SUSCEPTIBILITY; STRONTIUM
500 COMPOUNDS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; AC MAGNETIC SUSCEPTIBILITY; BI/SUB
510 2/(CASR/SUB 2/LI/SUB Y/) CU/SUB 2-Y/O/SUB 8/; BI/SUB 2/(CASR/SUB
510 2/NA/SUB Y/) CU/SUB 2-Y/O/SUB 8/; BI/SUB 2/(CASR/SUB 2/K/SUB
510 Y/)CU/SUB 2-Y/O/SUB 8/; YBA/SUB 2/CU/SUB 3.5-X/LI/SUB X/O/SUB 7/;
510 YBA/SUB 2/CU/SUB 3.5-X/NA/SUB X/O/SUB 7/; YBA/SUB 2/CU/SUB
510 3.5-X/K/SUB X/O/SUB 7/.
550 BI2CASR2LICUO8/SS BI2/SS SR2/SS BI/SS CA/SS CU/SS LI/SS O8/SS SR/SS
550 O/SS; BI2CASR2NACUO8/SS BI2/SS SR2/SS BI/SS CA/SS CU/SS NA/SS O8/SS
550 SR/SS O/SS; BI2CASR2KCUO8/SS BI2/SS SR2/SS BI/SS CA/SS CU/SS O8/SS
550 SR/SS K/SS O/SS; YBA2CULIO7/SS BA2/SS BA/SS CU/SS LI/SS O7/SS O/SS
550 Y/SS; YBA2CUNAO7/SS BA2/SS BA/SS CU/SS NA/SS O7/SS O/SS Y/SS;
550 YBA2CUKO7/SS BA2/SS BA/SS CU/SS O7/SS K/SS O/SS Y/SS.
DOCUMENT= 1161
AUTH = KOHL
DT = 02
KN = B40891205176
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378141
002 B40891205176
010 JOURNAL PAPER; EXPERIMENTAL.
100 NON-RESONANT MICROWAVE ABSORPTION IN LOW MAGNETIC FIELDS IN SAMPLES
100 OF YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ AND BICASRCU/SUB 2/O/SUB 5.5/ AT 77
100 K.
200 KOHL, M.; ODEHNAL, M.; PLINTOVIC, M.; SAFRATA, S. / VACEK, K.
220 INST. OF PHYS., CZECHOSLOVAK ACAD. OF SCI., PRAGUE, CZECHOSLOVAKIA
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.326-8, REF.16
350 ISSN 0953-2048
400 NON-RESONANT MICROWAVE ABSORPTION IN YBA/SUB 2/CU/SUB 9/O/SUB 7-X/
400 AND BICASRCU/SUB 2/O/SUB 5.5/ SAMPLES WAS MEASURED BELOW T/SUB C/ IN
400 LOW-MAGNETIC FIELDS. THE DIFFERENT BEHAVIOUR OF BOTH SAMPLES HAS BEEN
400 OBSERVED IN DEPENDENCE ON THE 100 KHZ MODULATION AMPLITUDE. RESULTS
400 OBTAINED HERE WERE COMPARED WITH LOW-FIELD MAGNETISATION CURVES.
500 BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; PARAMAGNETIC RESONANCE; STRONTIUM
500 COMPOUNDS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; NONRESONANT MICROWAVE ABSORPTION;
510 EPR; LOW MAGNETIC FIELDS; YBA/SUB 2/CU/SUB 3/O/SUB 7-X/; BICASRCU/SUB
510 2/O/SUB 5.5/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; BICASRCU2O5.5/SS
550 O5.5/SS CU2/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1162
AUTH = KARASIK
DT = 02
KN = B40891205177
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378142
002 B40891205177
010 JOURNAL PAPER; EXPERIMENTAL.
100 AN INVESTIGATION OF THE SUPERCONDUCTING PROPERTIES OF THE SYSTEM
100 BI-SR-CA-CU-O.
200 KARASIK, V.R.; OMELIANOVSKY, O.E.; TOGONIDZE, T.G.
220 P.N. LEBEDEV PHYS. INST., ACAD. OF SCI., MOSCOW, USSR
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.329-32, REF.12
350 ISSN 0953-2048
400 THE CRITICAL CURRENT DENSITY OF SAMPLES OF THE SYSTEM BI-SR-CA-CU-O
400 WITH DIFFERENT NOMINAL COMPOSITIONS IS INVESTIGATED. THE HIGHEST
400 TEMPERATURE AT WHICH ZERO RESISTIVITY WAS ACHIEVED IS T/SUB C.OFF/
400 APPROXIMATELY=80 K FOR THE SAMPLE WITH NOMINAL COMPOSITION BISR/SUB
400 1.2/CA/SUB 0.8/CU/SUB 2/O/SUB Y/. THE MAXIMUM CRITICAL CURRENT
400 DENSITY VALUE IN GRAINS AT T=60 K AND H=2*10/SUP 3/ OE IS 8.6*10/SUP
400 5/ A CM/SUP -2/.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CRITICAL CURRENT DENSITY
500 (SUPERCONDUCTIVITY); HIGH-TEMPERATURE SUPERCONDUCTORS; STRONTIUM
500 COMPOUNDS; SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTORS; CRITICAL CURRENT DENSITY; ZERO
510 RESISTIVITY; BI-SR-CA-CU-O.
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1163
AUTH = KOLINSKY
DT = 02
KN = B40891205178
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378143
002 B40891205178
010 JOURNAL PAPER; EXPERIMENTAL.
100 SUBSTRATE-TEMPERATURE DEPENDENCE OF THIN FILMS OF BISRCACUO DEPOSITED
100 BY THE LASER ABLATION METHOD.
200 KOLINSKY, P.V.; MAY, P.; HARRISON, M.R.; MILLER, P.; JEDAMZIK, D.
220 GEC HIRST RES. CENTRE, WEMBLEY, UK
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.333-5, REF.5
350 ISSN 0953-2048
400 THE PROPERTIES OF FILMS OF THE SUPERCONDUCTING CERAMIC BISRCACUO
400 PRODUCED USING A FREE-LASING ND:YAG LASER OPERATED AT 1.604 MU M ARE
400 SHOWN TO EXHIBIT WIDE COMPOSITIONAL CHANGES DEPENDING ON THE
400 TEMPERATURE OF THE SUBSTRATE DURING DEPOSITION. TEMPERATURES ABOVE
400 500 DEGREES C RESULT IN BISMUTH-POOR FILMS, WHILST TEMPERATURES BELOW
400 300 DEGREES C GIVE BISMUTH-RICH FILMS. THE VARIATION IN COMPOSITION
400 LEADS TO RADICALLY ALTERED ELECTRICAL PROPERTIES. THE OPTIMUM
400 COMPOSITION IS OBTAINED AT 450 DEGREES C AND GIVES SUPERCONDUCTING
400 FILMS WITH ZERO RESISTANCE AT 80 K AND CRITICAL CURRENT DENSITIES OF
400 34 KA CM/SUP -2/ AT 4.2 K.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CRITICAL CURRENT DENSITY
500 (SUPERCONDUCTIVITY); HIGH-TEMPERATURE SUPERCONDUCTORS; LASER BEAM
500 APPLICATIONS; STRONTIUM COMPOUNDS; SUPERCONDUCTING THIN FILMS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; VAPOUR DEPOSITION.
510 HIGH TEMPERATURE SUPERCONDUCTORS; THIN FILMS; LASER ABLATION;
510 CERAMIC; FREE-LASING ND:YAG LASER; ZERO RESISTANCE; CRITICAL CURRENT
510 DENSITIES; BISRCACUO.
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1164
AUTH = LIN
DT = 02
KN = B40891205179
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378144
002 B40891205179
010 JOURNAL PAPER; EXPERIMENTAL.
100 EFFECT OF ANNEALING ON SUPERCONDUCTIVITIES AND PHASES OF SPUTTERED
100 BI-SR-CA-CU-O FILMS.
200 LIN, R.J.; LU, S.W.; WU, P.T.
220 MATER. RES. LAB., IND. TECHNOL. RES. INST., CHUTUNG, HSINCHU, TAIWAN
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.336-9, REF.13
350 ISSN 0953-2048
400 STRONGLY ORIENTED SUPERCONDUCTING FILMS ON A (100)MGO SINGLE CRYSTAL
400 WITH T/SUB C/(ONSET)=118 K AND T/SUB C/(ZERO)=80 K HAVE BEEN PREPARED
400 BY THE RF MAGNETRON SPUTTERING PROCESS AND TWO-STEP ANNEALING. THE
400 TARGET WAS PREPARED BY SPRAY DEPOSITION OF A NITRATE SOLUTION. FILMS
400 WITH SIMILAR X-RAY DIFFRACTION PATTERNS SHOW SIGNIFICANTLY DIFFERENT
400 CURVES OF RESISTANCE AGAINST TEMPERATURE. IN ADDITION, A LONG
400 ANNEALING TIME FAVOURS THE FORMATION OF THE HIGH-T/SUB C/ PHASE.
500 ANNEALING; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; SPUTTER DEPOSITION; STRONTIUM COMPOUNDS;
500 SUPERCONDUCTING THIN FILMS; SUPERCONDUCTING TRANSITION TEMPERATURE;
500 X-RAY DIFFRACTION EXAMINATION OF MATERIALS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; ANNEALING; FILMS; RF MAGNETRON
510 SPUTTERING; X-RAY DIFFRACTION; RESISTANCE; BI-SR-CA-CU-O.
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1165
AUTH = GUPTA
DT = 02
KN = B40891205180
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378145
002 B40891205180
010 JOURNAL PAPER; EXPERIMENTAL.
100 HIGH-TEMPERATURE SUPERCONDUCTION IN BISMUTH CUPRATE FILM.
200 GUPTA, R.P.; KHOKLE, W.S.; TRIPATHI, C.C.; PACHAURI, J.P. / RAO,
200 S.U.M.
220 CENTRAL ELECTRON. ENG. RES. INST., PILANI, INDIA
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.340-2, REF.3
350 ISSN 0953-2048
400 THE FABRICATION OF THICK SUPERCONDUCTING FILMS OF THE BI-SR-CA-CU-O
400 SYSTEM ON ALUMINA SUBSTRATE IS REPORTED. THE INVESTIGATION SHOWS A
400 STRONG DEPENDENCE OF THE SUPERCONDUCTING PROPERTIES ON ANNEALING
400 CONDITIONS. AN OPTIMAL TEMPERATURE-TIME COMBINATION IS REQUIRED TO
400 OBTAIN SUPERCONDUCTION IN THE FILM, WHICH LARGELY DEPENDS ON THE
400 AMBIENT TO WHICH THE FILM IS SUBJECTED FOR HEAT TREATMENT. THE BEST
400 RESULTS THE AUTHORS COULD ACHIEVE ARE T/SUB C/ (ONSET)=90 K AND T/SUB
400 C/ (ZERO) AT 75 K IN THICK FILMS ( APPROXIMATELY 50 MU M).
400 RESISTANCE-TEMPERATURE (R-T) CHARACTERISTICS, SEM SURFACE TOPOGRAPHY
400 AND ELEMENTAL COMPOSITION OF THE SUPERCONDUCTING FILMS ARE DESCRIBED.
500 ANNEALING; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; MATERIALS PREPARATION; SCANNING ELECTRON MICROSCOPE
500 EXAMINATION OF MATERIALS; STRONTIUM COMPOUNDS; SUPERCONDUCTING THIN
500 FILMS; SUPERCONDUCTING TRANSITION TEMPERATURE; SURFACE STRUCTURE.
510 HIGH TEMPERATURE SUPERCONDUCTORS; TRANSITION TEMPERATURE; RESISTANCE;
510 ANNEALING; THICK FILMS; SEM SURFACE TOPOGRAPHY; COMPOSITION;
510 BI-SR-CA-CU-O.
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1166
AUTH = MACKRODT
DT = 02
KN = B40891205181
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378146
002 B40891205181
010 JOURNAL PAPER; EXPERIMENTAL.
100 CALCULATED LATTICE STRUCTURE, STABILITY AND PROPERTIES OF THE SERIES
100 BI/SUB 2/X/SUB 2/CUO/SUB 6/ (X=CA, SR, BA), BI/SUB 2/X/SUB 2/YCU/SUB
100 2/O/SUB 8/ (X=CA, SR, BA; Y=MG, CA, SR, BA) AND BI/SUB 2/X/SUB
100 2/Y/SUB 2/CU/SUB 3/O/SUB 10/ (X=CA, SR, BA; Y=BA, SR, CA, MG).
200 MACKRODT, W.C.
220 ICI CHEM. ? POLYMERS LTD., RUNCORN, UK
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.343-8, REF.33
350 ISSN 0953-2048
400 ATOMISTIC LATTICE CALCULATIONS ARE REPORTED OF THE STRUCTURE,
400 STABILITY, PHONON DENSITY OF STATES AND ELASTIC PROPERTIES OF THE
400 SERIES BI/SUB 2/X/SUB 2/CUO/SUB 6/ (X=CA, SR, BA), BI/SUB 2/X/SUB
400 2/YCU/SUB 2/O/SUB 8/ (X=CA, SR, BA; Y=MG, CA, SR, BA) AND BI/SUB
400 2/X/SUB 2/Y/SUB 2/CU/SUB 3/O/SUB 10/ (X=CA, SR, BA; Y=BA, SR, CA,
400 MG). COMPARISONS ARE MADE WITH BI/SUB 2/SR/SUB 2/CUO/SUB 6/, BI/SUB
400 2/SR/SUB 2/CACU/SUB 2/O/SUB 8/ AND BI/SUB 2/SR/SUB 2/CA/SUB 2/CU/SUB
400 3/O/SUB 10/, WHICH ARE CLOSE TO RECENTLY DISCOVERED HIGH-T/SUB C/
400 PHASES.
500 BISMUTH COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 ELASTIC CONSTANTS; HIGH-TEMPERATURE SUPERCONDUCTORS; LATTICE PHONONS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; LATTICE STRUCTURE; STABILITY;
510 PHONON DENSITY OF STATES; ELASTIC PROPERTIES; BICACUO; BISRCUO;
510 BIBACUO.
550 BICACUO/SS BI/SS CA/SS CU/SS O/SS; BISRCUO/SS BI/SS CU/SS SR/SS O/SS;
550 BIBACUO/SS BA/SS BI/SS CU/SS O/SS; BI/SS CU/SS O/SS.
DOCUMENT= 1167
AUTH = HETTINGE
DT = 02
KN = B40891205182
LG = ENGL
SN = ISSN 0953-2048
YR = 89
000 3378147
002 B40891205182
010 JOURNAL PAPER; EXPERIMENTAL.
100 RESISTIVE TRANSITION OF TLBACACUO IN HIGH MAGNETIC FIELDS.
200 HETTINGER, J.D.; SWANSON, A.G.; BROOKS, J.S. / HUANG, Y.Z.; CHEN,
200 L.Q.; ZHONG-XIAN ZHAO
220 DEPT. OF PHYS., BOSTON UNIV., MA, USA
310 SUPERCOND. SCI. TECHNOL. (UK)
330 1989. VOL.1, NO.6, P.349-51, REF.13
350 ISSN 0953-2048
400 THE AUTHORS HAVE MEASURED THE RESISTANCE OF A POLYCRYSTALLINE SAMPLE
400 OF TL-BA-CA-CU-O AS A FUNCTION OF TEMPERATURE AND MAGNETIC FIELD.
400 ABOVE T/SUB C/, THEY SEE NO SYSTEMATIC CHANGE IN RESISTANCE AS A
400 MAGNETIC FIELD IS APPLIED. THE DEVIATION FROM LINEARITY (ONSET OF
400 PARACONDUCTIVITY) IN THE RESISTIVITY TRANSITION T/SUB C/ HAS BEEN
400 ANALYSED IN TERMS OF FLUCTUATIONS. APPLICATION OF A MAGNETIC FIELD
400 HAS ONLY A SMALL EFFECT ON THE PARACONDUCTIVITY. BELOW T/SUB C/, THE
400 RESISTIVITY TRANSITION HAS AN ACTIVATED BEHAVIOUR WITH ACTIVATION
400 ENERGIES VARYING FROM 1 EV AT 0 T TO 40 MEV AT 19 T. THIS BEHAVIOUR
400 MAY BE EXPLAINED WITHIN THE FRAMEWORK OF ANDERSON'S THEORY OF
400 THERMALLY ACTIVATED FLUX MOTION.
500 BARIUM COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; MAGNETIC FLUX; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; THALLIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; PARACONDUCTIVITY; RESISTIVITY
510 TRANSITION; ANDERSON'S THEORY; THERMALLY ACTIVATED FLUX MOTION;
510 TLBACACUO.
550 TLBACACUO/SS BA/SS CA/SS CU/SS TL/SS O/SS.
DOCUMENT= 1168
AUTH = MUNAKATA
DT = 02
KN = B40891205539
LG = JAPA
SN = ISSN 0914-5400
YR = 89
000 3378504
002 B40891205539
010 JOURNAL PAPER; EXPERIMENTAL.
100 EFFECTS OF N/SUB 2/O GAS ON ELECTRICAL PROPERTIES OF EU/SUB
100 1+X/BA/SUB 2-X/CU/SUB 3/O/SUB Y/.
200 MUNAKATA, F.; SHINOHARA, K.; YAMANAKA, M.
220 MATER. RES. LAB., NISSAN MOTOR CO. LTD., KANAGAWA, JAPAN
310 NIPPON SERAMIKKUSU KYOKAI GAKUJUTSU RONBUNSHI (JAPAN)
330 1989. VOL.97, NO.2, P.200-2, REF.6. (IN JAPANESE)
350 ISSN 0914-5400, CODEN NSKRE2
400 THE TEMPERATURE DEPENDENCE OF ELECTRICAL RESISTANCE OF EU/SUB
400 1+X/BA/SUB 2-X/CU/SUB 3/O/SUB Y/ (X=0.0, 0.2, AND 0.5) WAS MEASURED
400 IN N/SUB 2/O AND 5% N/SUB 2/O-N/SUB 2/. KINKS WERE OBSERVED IN THE
400 TEMPERATURE-RESISTANCE CURVES OF EUBA/SUB 2/CU/SUB 3/O/SUB Y/ IN
400 N/SUB 2/O AND 5% N/SUB 2/O-N/SUB 2/. THIS BEHAVIOR WAS CONSIDERED TO
400 BE RELATED TO THE ORDER-DISORDER TRANSITION OF OXYGEN VACANCIES
400 (OXYGEN IONS). SUBSTITUTION OF EU IONS FOR BA IONS AFFECTS THE
400 DECOMPOSITION OF N/SUB 2/O AND THE MIGRATION OF OXYGEN IONS, THAT IS
400 THE LOCAL REARRANGEMENT OF OXYGEN IONS IN EU/SUB 1+X/BA/SUB
400 2-X/CU/SUB 3/O/SUB Y/.
500 BARIUM COMPOUNDS; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE
500 SEMICONDUCTORS AND INSULATORS; EUROPIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; ORDER-DISORDER TRANSFORMATIONS; VACANCIES (CRYSTAL).
510 HIGH TEMPERATURE SUPERCONDUCTOR; SUBSTITUTION; TEMPERATURE
510 DEPENDENCE; ELECTRICAL RESISTANCE; ORDER-DISORDER TRANSITION;
510 VACANCIES; DECOMPOSITION; N/SUB 2/O GAS; EU/SUB 1+X/BA/SUB 2-X/CU/SUB
510 3/O/SUB Y/.
550 N2O/BIN N2/BIN N/BIN O/BIN; EUBACU3O/SS CU3/SS BA/SS CU/SS EU/SS
550 O/SS.
DOCUMENT= 1169
AUTH = TAKAHASH
DT = 02
KN = B40891205704
LG = ENGL
SN = ISSN 0021-4434
YR = 89
000 3378669
002 B40891205704
010 JOURNAL PAPER; EXPERIMENTAL.
100 EFFECT OF TI AND ZR ADDITIONS ON THE INTERNAL OXIDATION OF CU-SI
100 ALLOY.
200 TAKAHASHI, T. / HASHIMOTO, Y.; KOYAMA, K.
220 IND. RES. INST. OF HYOGO PREFECTURE, KOBE, JAPAN
310 MATER. TRANS. JIM (JAPAN)
330 FEB. 1989. VOL.30, NO.2, P.127-36, REF.23
350 ISSN 0021-4434, CODEN TJIMAA
400 THE DILUTE CU-SI, CU-SI-TI AND CU-SI-ZR ALLOYS WERE INTERNALLY
400 OXIDIZED IN THE TEMPERATURE RANGE OF 973-1323 K. THE CRYSTAL
400 STRUCTURES OF DISPERSED OXIDES IN THE INTERNALLY OXIDIZED ALLOYS WERE
400 IDENTIFIED BY X-RAY DIFFRACTOMETRY. THE MEASUREMENTS OF MEAN PARTICLE
400 SIZES, ANALYSIS OF DISPERSED PARTICLES AND THE OBSERVATION OF
400 PRECIPITATE MORPHOLOGY WERE CARRIED OUT WITH AN ANALYTICAL
400 TRANSMISSION ELECTRON MICROSCOPE. THE HARDNESS MEASUREMENTS WERE
400 PERFORMED USING A MICRO-VICKERS HARDNESS TESTER. THE OXIDE PARTICLES
400 IN THE INTERNALLY OXIDIZED CU-SI BINARY ALLOYS WERE INITIALLY
400 DENDRITIC AND SUBSEQUENTLY TRANSFORMED TO SPHERICAL IN PROCESS OF
400 TIME. BY ADDITION OF TI AND ZR INTO THE CU-SI ALLOY, THE DISPERSED
400 OXIDE PARTICLES BECAME MARKEDLY FINER. THE OXIDE PHASE IN THE
400 INTERNALLY OXIDIZED CU-SI ALLOYS IN THE TEMPERATURE RANGE OF 973-1073
400 K WAS AMORPHOUS SIO/SUB 2/, BUT AT 1173-1323 K ALPHA -CRISTOBALITE
400 WAS PRECIPITATED IN ADDITION TO AMORPHOUS SIO/SUB 2/.
500 ALLOYING ADDITIONS; COPPER ALLOYS; CRYSTAL MICROSTRUCTURE; DISPERSION
500 HARDENING; HARDNESS; SILICON ALLOYS; TITANIUM ALLOYS; TRANSMISSION
500 ELECTRON MICROSCOPE EXAMINATION OF MATERIALS; X-RAY DIFFRACTION
500 EXAMINATION OF MATERIALS; ZIRCONIUM ALLOYS.
510 INTERNAL OXIDATION; TEMPERATURE RANGE; CRYSTAL STRUCTURES; X-RAY
510 DIFFRACTOMETRY; MEAN PARTICLE SIZES; PRECIPITATE MORPHOLOGY;
510 ANALYTICAL TRANSMISSION ELECTRON MICROSCOPE; HARDNESS MEASUREMENTS;
510 MICRO-VICKERS HARDNESS TESTER; DENDRITIC; SPHERICAL; DISPERSED OXIDE
510 PARTICLES; AMORPHOUS SIO/SUB 2/; ALPHA -CRISTOBALITE; 973 TO 1323 K;
510 CU-SI-TI; CU-SI-ZR ALLOYS; INTERNALLY OXIDIZED CU-SI BINARY ALLOYS.
550 CUSITI/SS CU/SS SI/SS TI/SS; CUSIZR/SS CU/SS SI/SS ZR/SS; CUSI/BIN
550 CU/BIN SI/BIN.
560 TEMPERATURE 9.73 E+02 TO 1.323 E+03 K.
DOCUMENT= 1170
AUTH = NOGI
DT = 02
KN = B40891205705
LG = ENGL
SN = ISSN 0021-4434
YR = 89
000 3378670
002 B40891205705
010 JOURNAL PAPER; EXPERIMENTAL.
100 WETTABILITY OF SOLID OXIDES BY LIQUID PURE METALS.
200 NOGI, K.; OISHI, K.; OGINO, K.
220 DEPT. OF MATER. SCI. ? PROCESS., OSAKA UNIV., SUITA, JAPAN
310 MATER. TRANS. JIM (JAPAN)
330 FEB. 1989. VOL.30, NO.2, P.137-45, REF.43
350 ISSN 0021-4434, CODEN TJIMAA
400 THE WETTABILITIES OF SOLID OXIDES (AL/SUB 2/O/SUB 3/, MGO, CAO,
400 ZRO/SUB 2/, AND SIO/SUB 2/) BY LIQUID PURE METALS (SN, AG, AU, AND
400 CU) HAVE BEEN MEASURED OVER A WIDE TEMPERATURE RANGE BY THE SESSILE
400 DROP METHOD. SURFACE TENSIONS OF PURE LIQUID METALS CAN BE EXPRESSED
400 BY THE FOLLOWING EQUATIONS: GAMMA /SUB SN/=551-0.09(T(K)-505), GAMMA
400 /SUB AG/=910-0.17(T(K)-1234), GAMMA /SUB AU/=1105-0.28(T(K)-1336),
400 GAMMA /SUB CU/=1320-0.28(T(K)-1356). CONTACT ANGLES AND WORK OF
400 ADHESIONS BETWEEN LIQUID PURE METALS AND SOLID OXIDES WERE CLOSELY
400 RELATED TO THE STANDARD FREE ENERGY CHANGE OF FORMATION OF OXIDES.
400 VALUES OF CONTACT ANGLE AND WORK OF ADHESION CHANGED LINEARLY WITH
400 TEMPERATURE AND IN SOME SYSTEMS REFRACTED POINTS WERE OBSERVED AT THE
400 TEMPERATURES WHICH CORRESPONDED TO THE REFRACTED POINTS IN THE FREE
400 ENERGY-TEMPERATURE DIAGRAM.
500 ALUMINA; CALCIUM COMPOUNDS; CONTACT ANGLE; LIQUID METALS; MAGNESIUM
500 COMPOUNDS; SILICON COMPOUNDS; WETTING; ZIRCONIUM COMPOUNDS.
510 SOLID OXIDES; LIQUID PURE METALS; WETTABILITIES; SESSILE DROP METHOD;
510 WORK OF ADHESIONS; STANDARD FREE ENERGY CHANGE; CONTACT ANGLE;
510 REFRACTED POINTS; FREE ENERGY-TEMPERATURE DIAGRAM; AL/SUB 2/O/SUB 3/;
510 MGO; CAO; ZRO/SUB 2/; SIO/SUB 2/; SN; AG; AU; CU.
550 AL2O3/SUR AL2/SUR AL/SUR O3/SUR O/SUR AL2O3/BIN AL2/BIN AL/BIN O3/BIN
550 O/BIN; MGO/SUR MG/SUR O/SUR MGO/BIN MG/BIN O/BIN; CAO/SUR CA/SUR
550 O/SUR CAO/BIN CA/BIN O/BIN; ZRO2/SUR O2/SUR ZR/SUR O/SUR ZRO2/BIN
550 O2/BIN ZR/BIN O/BIN; SIO2/SUR O2/SUR SI/SUR O/SUR SIO2/BIN O2/BIN
550 SI/BIN O/BIN; SN/EL; AG/EL; AU/EL; CU/EL.
DOCUMENT= 1171
AUTH = SCHULLER
DT = 02
KN = B40891205708
LG = ENGL
SN = ISSN 0883-7694
YR = 89
000 3378673
002 B40891205708
010 JOURNAL PAPER; REVIEW, THEORETICAL.
100 STRUCTURE OF HIGH T/SUB C/ OXIDE SUPERCONDUCTORS.
200 SCHULLER, I.K.; JORGENSEN, J.D.
310 MRS BULL. (USA)
330 JAN. 1989. VOL.14, NO.1, P.27-30, REF.35
350 ISSN 0883-7694, CODEN MRSBEA
400 THE AUTHORS PRESENT A SURVEY OF THE STRUCTURES OF OXIDE
400 SUPERCONDUCTORS. THE COMMON FEATURE OF THESE STRUCTURES (WITH THE
400 EXCEPTION OF CUBIC BA/SUB 1-X/K/SUB X/BIO/SUB 3-Y/) IS THE PRESENCE
400 OF ONE OR MORE PLANES OF COPPER ATOMS WITH FOUR STRONGLY BONDED
400 OXYGEN ATOM NEIGHBORS IN A SQUARE PLANAR ARRANGEMENT AT A DISTANCE OF
400 APPROXIMATELY 1.90 AA ('CUO/SUB 2/ PLANES'). IN SOME STRUCTURES THESE
400 PLANES OCCUR IN GROUPS, WITH THE INDIVIDUAL PLANES INSIDE A GROUP
400 BEING SEPARATED BY ONE Y OR CA LAYER AND THE GROUPS BEING
400 INTERCALATED BY A VARIABLE NUMBER OF LAO, BAO, CUO, TLO AND/OR BIO
400 LAYERS. A NATURAL MODEL FOR SUPERCONDUCTIVITY WHICH ARISES FROM THESE
400 STRUCTURES IS THAT THE CONDUCTIVITY OCCURS PREDOMINANTLY IN THE
400 CUO/SUB 2/ PLANES, WHILE THE OTHER (INTERCALATED) LAYERS PROVIDE IN
400 SOME FASHION CARRIERS AND/OR THE COUPLING MECHANISM NECESSARY FOR THE
400 SUPERCONDUCTIVITY. THE AUTHORS CONCLUDE THAT STRUCTURE, METAL-SITE
400 DOPING OXYGEN STOICHIOMETRY, AND ORDERING ARE THE IMPORTANT
400 INGREDIENTS DETERMINING THE SUPERCONDUCTIVITY.
500 CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CRYSTAL STRUCTURE; CUO/SUB 2/
510 PLANES; O STOICHIOMETRY; METAL-SITE DOPING; BA/SUB 1-X/K/SUB
510 X/BIO/SUB 3-Y/; LA/SUB 2-X/BA/SUB X/CUO/SUB 4/; LA/SUB 2-X/SR/SUB
510 X/CUO/SUB 4/; LA/SUB 2-X/CA/SUB X/CUO/SUB 4/; TL-CA-BA-CU-O;
510 BI-CA-SR-CU-O.
550 BAKBIO/SS BA/SS BI/SS K/SS O/SS; LABACUO4/SS BA/SS CU/SS LA/SS O4/SS
550 O/SS; LASRCUO4/SS CU/SS LA/SS O4/SS SR/SS O/SS; LACACUO4/SS CA/SS
550 CU/SS LA/SS O4/SS O/SS; BA2/SS CU3/SS BA/SS CU/SS O/SS; TLCABACUO/SS
550 BA/SS CA/SS CU/SS TL/SS O/SS; BICASRCUO/SS BI/SS CA/SS CU/SS SR/SS
550 O/SS.
DOCUMENT= 1172
AUTH = FISK
DT = 02
KN = B40891205709
LG = ENGL
SN = ISSN 0883-7694
YR = 89
000 3378674
002 B40891205709
010 JOURNAL PAPER; REVIEW.
100 SUPERCONDUCTIVITY AND MAGNETISM IN THE LA/SUB 2/CUO/SUB 4/-BASED
100 COMPOUNDS.
200 FISK, Z.; CHEONG, S.-W.; JOHNSTON, D.C.
310 MRS BULL. (USA)
330 JAN. 1989. VOL.14, NO.1, P.33-6, REF.28
350 ISSN 0883-7694, CODEN MRSBEA
400 THE AUTHORS REVIEW ELECTRONIC TRANSPORT DATA, MAGNETIC DATA AND
400 SUPERCONDUCTIVITY INVESTIGATIONS IN LA/SUB 2/CUO/SUB 4/-BASED
400 COMPOUNDS. THE EFFECT OF LOWER VALENT ALKALINE EARTH AND ALKALI METAL
400 SUBSTITUTIONS IS TO PRODUCE CU/SUP 3+/ IONS, I.E. HOLE CARRIERS AND
400 EVENTUALLY METALLIC BEHAVIOUR. THE AUTHORS CONCLUDE THAT THE
400 FUNDAMENTAL QUESTION REGARDING THE MECHANISM OF SUPERCONDUCTIVITY IN
400 THE HIGH T/SUB C/ OXIDES REMAINS UNSOLVED.
500 ANTIFERROMAGNETIC PROPERTIES OF SUBSTANCES; ELECTRICAL CONDUCTIVITY
500 OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LANTHANUM COMPOUNDS; NEEL TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTOR; PHASE DIAGRAM; NEEL TEMPERATURE;
510 ANTIFERROMAGNETISM; MAGNETIC SUSCEPTIBILITY; LA/SUB 2/CUO/SUB
510 4/-BASED COMPOUNDS; REVIEW; ELECTRONIC TRANSPORT; HOLE CARRIERS;
510 LA/SUB 2/CUO/SUB 4/.
550 LA2CUO4/SS LA2/SS CU/SS LA/SS O4/SS O/SS; CU/SS LA/SS O4/SS O/SS.
DOCUMENT= 1173
AUTH = MARKERT
DT = 02
KN = B40891205710
LG = ENGL
SN = ISSN 0883-7694
YR = 89
000 3378675
002 B40891205710
010 JOURNAL PAPER; BIBLIOGRAPHY, REVIEW.
100 MAGNETISM, SUPERCONDUCTIVITY, AND CHEMICAL SUBSTITUTIONS IN YBA/SUB
100 2/CU/SUB 3/O/SUB 7- DELTA /.
200 MARKERT, J.T.; DUNLAP, B.D.; MAPLE, M.B.
310 MRS BULL. (USA)
330 JAN. 1989. VOL.14, NO.1, P.37-44, REF.103
350 ISSN 0883-7694, CODEN MRSBEA
400 THE ORIGIN AND NATURE OF THE HIGH T/SUB C/ SUPERCONDUCTIVITY OF THE
400 RBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / COMPOUNDS CONSTITUTES A
400 FORMIDABLE CHALLENGE TO EXPERIMENTALISTS AND THEORISTS ALIKE. ONE OF
400 THE MOST INTRIGUING POSSIBILITIES IS THAT A MAGNETIC MECHANISM,
400 RATHER THAN THE ELECTRON-PHONON INTERACTION, IS RESPONSIBLE FOR THE
400 FORMATION OF THE SUPERCONDUCTING ELECTRON PAIRS IN THE HIGH T/SUB C/
400 COPPER OXIDES. THE PRIMARY EVIDENCE FOR A MAGNETIC PAIRING MECHANISM
400 IS THE PROXIMITY OF ANTIFERROMAGNETISM AND SUPERCONDUCTIVITY AS THE
400 CONCENTRATION OF HOLES IN THE CONDUCTING CUO/SUB 2/ PLANES IS VARIED.
400 THE AUTHORS (1) DISCUSS THE TWO TYPES OF ANTIFERROMAGNETIC ORDER THAT
400 OCCUR IN THE RBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / COMPOUNDS, INVOLVING
400 CU/SUP 2+/ IONS IN THE FIRST CASE AND R/SUP 3+/ IONS IN THE SECOND,
400 (2) DESCRIBE SOME OF THE SUPERCONDUCTING PROPERTIES OF THE RBA/SUB
400 2/CU/SUB 3/O/SUB 7- DELTA / COMPOUNDS, AND (3) CONSIDER THE EFFECT OF
400 CHEMICAL SUBSTITUTIONS ON THE SUPERCONDUCTING PROPERTIES (IN
400 PARTICULAR T/SUB C/) OF THE RBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /
400 COMPOUNDS.
500 ANTIFERROMAGNETIC PROPERTIES OF SUBSTANCES; BARIUM COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; RARE EARTH COMPOUNDS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CRITICAL TEMPERATURE;
510 ANTIFERROMAGNETIC ORDER; RBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /;
510 CHEMICAL SUBSTITUTIONS; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 BA2/SS CU3/SS BA/SS CU/SS O/SS; YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS
550 O/SS Y/SS.
DOCUMENT= 1174
AUTH = SLEIGHT
DT = 02
KN = B40891205711
LG = ENGL
SN = ISSN 0883-7694
YR = 89
000 3378676
002 B40891205711
010 JOURNAL PAPER; REVIEW, THEORETICAL.
100 HIGH T/SUB C/ BISMUTH AND THALLIUM COPPER OXIDE SUPERCONDUCTORS.
200 SLEIGHT, A.W.; SUBRAMANIAN, M.A.; TORARDI, C.C.
310 MRS BULL. (USA)
330 JAN. 1989. VOL.14, NO.1, P.45-8, REF.29
350 ISSN 0883-7694, CODEN MRSBEA
400 IT IS NOW KNOWN THAT THERE EXISTS A VERY LARGE FAMILY OF
400 SUPERCONDUCTING COMPOUNDS OF THE TYPE (AO)/SUB M/M/SUB 2/CA/SUB
400 N-1/CU/SUB N/O/SUB 2N+2/. THE A CATION CAN BE TL, PB, BI OR MIXTURES
400 OF THESE ELEMENTS. THE VALUE OF M MAY BE ONE OR TWO BUT IS ONLY TWO
400 WHEN A IS BI. THE M CATION IS BA OR SR, AND SUBSTITUTION OF CA BY SR
400 IS FREQUENTLY OBSERVED. THE NUMBER OF CONSECUTIVELY STACKED CUO/SUB
400 2/ LAYERS IS INDICATED BY N. THE AUTHORS GIVE DETAIL OF THE
400 STRUCTURAL PROPERTIES OF THESE COMPOUNDS AND HOW THESE MIGHT
400 CORRELATE TO THE CRITICAL TEMPERATURE. THE BAND STRUCTURE OF THESE
400 COMPOUNDS IS ALSO CONSIDERED.
500 BAND STRUCTURE OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS; BISMUTH
500 COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; THALLIUM COMPOUNDS.
510 CRYSTAL STRUCTURE; HIGH TEMPERATURE SUPERCONDUCTOR; (AO)/SUB M/M/SUB
510 2/CA/SUB N-1/CU/SUB N/O/SUB 2N+2/; CRITICAL TEMPERATURE; BAND
510 STRUCTURE; TL-BA-CA-CU-O; BI-SR-CA-CU-O; TL-PB-SR-CA-CU-O;
510 TL-BI-SR-CA-CU-O.
550 TLBACACUO/SS BA/SS CA/SS CU/SS TL/SS O/SS; BISRCACUO/SS BI/SS CA/SS
550 CU/SS SR/SS O/SS; TLPBSRCACUO/SS CA/SS CU/SS PB/SS SR/SS TL/SS O/SS;
550 TLBISRCACUO/SS BI/SS CA/SS CU/SS SR/SS TL/SS O/SS.
DOCUMENT= 1175
AUTH = CAVA
DT = 02
KN = B40891205712
LG = ENGL
SN = ISSN 0883-7694
YR = 89
000 3378677
002 B40891205712
010 JOURNAL PAPER; REVIEW, EXPERIMENTAL.
100 SUPERCONDUCTIVITY AT HIGH TEMPERATURES WITHOUT COPPER: BA/SUB
100 1-X/K/SUB X/BIO/SUB 3/.
200 CAVA, R.J.; BATLOGG, B.
310 MRS BULL. (USA)
330 JAN. 1989. VOL.14, NO.1, P.49-52, REF.19
350 ISSN 0883-7694, CODEN MRSBEA
400 THE AUTHORS GIVE DETAILS OF THE SYNTHESIS AND CRYSTAL STRUCTURE OF
400 THIS COMPOUND MAKING COMPARISONS WITH THE PARENT COMPOUND BABIO/SUB
400 3/ AND RELATED COMPOUND BAPB/SUB 1-X/BI/SUB X/O/SUB 3/ WHICH IS ALSO
400 SUPERCONDUCTING. MAGNETIC SUSCEPTIBILITY RESULTS ARE PRESENTED FOR
400 BA/SUB 1-X/K/SUB X/BIO/SUB 3/ AND BAPB/SUB 1-X/BI/SUB X/O/SUB 3/.
400 HIGH T/SUB C/ IN BA/SUB 0.6/K/SUB 0.4/BIO/SUB 3/ OCCURS WITHOUT THE
400 BENEFIT OF A HIGH DENSITY OF STATES AT THE FERMI LEVEL. FOR THIS
400 COMPOSITION THE SOMMERFIELD PARAMETER GAMMA IS CALCULATED FROM
400 MAGNETIC MEASUREMENTS NEAR T/SUB C/ AND A PLOT OF GAMMA AGAINST T/SUB
400 C/ IS GIVEN TO COMPARE BA/SUB 0.6/K/SUB 0.4/BIO/SUB 3/ WITH OTHER
400 SUPERCONDUCTORS.
500 BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 DIAMAGNETIC PROPERTIES OF SUBSTANCES; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; MAGNETIC SUSCEPTIBILITY; POTASSIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; MAGNETIC SUSCEPTIBILITY;
510 DIAMAGNETISM; CRITICAL TEMPERATURE; SYNTHESIS; CRYSTAL STRUCTURE;
510 SOMMERFIELD PARAMETER; BABIO/SUB 3/; BAPB/SUB 1-X/BI/SUB X/O/SUB 3/;
510 BA/SUB 1-X/K/SUB X/BIO/SUB 3/.
550 BABIO3/SS BA/SS BI/SS O3/SS O/SS; BAPBBIO3/SS BA/SS BI/SS O3/SS PB/SS
550 O/SS; BAKBIO3/SS BA/SS BI/SS O3/SS K/SS O/SS.
DOCUMENT= 1176
AUTH = TARASCON
DT = 02
KN = B40891205713
LG = ENGL
SN = ISSN 0883-7694
YR = 89
000 3378678
002 B40891205713
010 JOURNAL PAPER; REVIEW.
100 OXYGEN STOICHIOMETRY AND THE HIGH T/SUB C/ SUPERCONDUCTING OXIDES.
200 TARASCON, J.-M.; BAGLEY, B.G.
310 MRS BULL. (USA)
330 JAN. 1989. VOL.14, NO.1, P.53-7, REF.29
350 ISSN 0883-7694, CODEN MRSBEA
400 IN THE HIGH T/SUB C/ CUPRATES THE FORMAL VALENCE STATE OF CU CAN BE
400 SIMPLY MODIFIED BY CHANGING THE OXYGEN CONTENT. THE AUTHORS DISCUSS
400 THE CHANGES AS OCCURRING IN THE FORMAL OXIDATION STATE OF THE CU, BUT
400 RECOGNIZE THAT A HOLE CHARGE STATE INTRODUCED, FOR EXAMPLE, BY
400 CONTINUED OXIDATION COULD BE ASSOCIATED WITH EITHER THE COPPER
400 (CU/SUP 2+/ TO CU/SUP 3+/) OR WITH THE OXYGEN (O/SUP 2-/ TO O/SUP
400 1-/) LEADING TO A NET (CU-O)/SUP +X/. INDEED SOME RECENT RESEARCH
400 INDICATES THAT THE HOLES ARE ASSOCIATED WITH THE OXYGEN. LA-SR-CU-O,
400 Y-BA-CU-O, AND BI-SR-CA-CU-O ARE DENOTED RESPECTIVELY AS THE 40 K, 90
400 K AND 85 K SYSTEMS. ALTHOUGH ALL ARE DISCUSSED, MOST ATTENTION
400 FOCUSES ON THE 90 K MATERIALS AS THIS IS THE SYSTEM MOST AFFECTED BY
400 OXYGEN CONTENT. A DISCUSSION OF THE EFFECTS OF OXYGEN STOICHIOMETRY
400 ON ALL PHYSICAL PROPERTIES IS NOT GIVEN, ONLY CERTAIN PROPERTIES
400 (MOSTLY RELATED TO THE SUPERCONDUCTING TRANSITION) ARE EMPHASIZED.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LATTICE CONSTANTS; STOICHIOMETRY;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; VALENCY.
510 O STOICHIOMETRY; CRITICAL TEMPERATURE; HIGH TEMPERATURE
510 SUPERCONDUCTOR; LATTICE CONSTANTS; BOND LENGTHS; HOLE CHARGE STATE;
510 LA-SR-CU-O; Y-BA-CU-O; BI-SR-CA-CU-O.
550 LASRCUO/SS CU/SS LA/SS SR/SS O/SS; YBACUO/SS BA/SS CU/SS O/SS Y/SS;
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1177
AUTH = LAIBOWIT
DT = 02
KN = B40891205714
LG = ENGL
SN = ISSN 0883-7694
YR = 89
000 3378679
002 B40891205714
010 JOURNAL PAPER; APPLICATIONS, REVIEW, EXPERIMENTAL.
100 HIGH T/SUB C/ SUPERCONDUCTING THIN FILMS (SQUID FABRICATION).
200 LAIBOWITZ, R.B.
310 MRS BULL. (USA)
330 JAN. 1989. VOL.14, NO.1, P.58-62, REF.42
350 ISSN 0883-7694, CODEN MRSBEA
400 EARLY EFFORTS AT THIN FILM FABRICATION WERE GENERALLY ACCOMPLISHED
400 USING MULTI-ELEMENT DEPOSITION TECHNIQUES BUT SUBSEQUENT DEVELOPMENT
400 HAS SEEN MANY VARIETIES OF FILM FABRICATION TECHNIQUES USED QUITE
400 SUCCESSFULLY TO FABRICATE HIGH-QUALITY FILMS. THE AUTHOR ILLUSTRATES
400 THESE DEVELOPMENTS BY DISCUSSING ELECTRON-BEAM AND SPUTTER DEPOSITION
400 TECHNIQUES, PARTICULARLY AS USED AT IBM. EARLY RESULTS USING THESE
400 TECHNIQUES HAVE LED TO FILMS WITH REPRODUCIBLE CRITICAL TEMPERATURES
400 AND HIGH CRITICAL CURRENT DENSITIES AND HAVE BEEN USED TO FABRICATE
400 SENSITIVE SQUIDS THAT OPERATE ABOVE 77 K. IN ORDER TO USE THESE FILMS
400 IN MOST ELECTRONICS APPLICATIONS, PATTERN PROCESSES HAVE BEEN
400 DEVELOPED AND LINEWIDTHS TO BELOW 2 MU M ARE CONSISTENTLY ACHIEVED.
400 INITIAL APPLICATIONS OF THESE FILMS INCLUDE SQUIDS, TRANSMISSION
400 LINES, AND TUNNEL JUNCTION STUDIES.
500 ELECTRON BEAM DEPOSITION; HIGH-TEMPERATURE SUPERCONDUCTORS; SPUTTER
500 DEPOSITION; SQUIDS; SUPERCONDUCTING JUNCTION DEVICES; SUPERCONDUCTING
500 THIN FILMS.
510 HIGH TEMPERATURE SUPERCONDUCTOR THIN FILMS; ELECTRON-BEAM DEPOSITION;
510 SQUID; TUNNEL JUNCTION DEVICES; THIN FILM FABRICATION; SPUTTER
510 DEPOSITION; IBM; PATTERN PROCESSES; LINEWIDTHS; TRANSMISSION LINES.
DOCUMENT= 1178
AUTH = NELLIS
DT = 02
KN = B40891205715
LG = ENGL
SN = ISSN 0883-7694
YR = 89
000 3378680
002 B40891205715
010 JOURNAL PAPER; REVIEW.
100 NOVEL PREPARATION METHODS FOR HIGH T/SUB C/ OXIDE SUPERCONDUCTORS.
200 NELLIS, W.J.; WOOLF, L.D.
310 MRS BULL. (USA)
330 JAN. 1989. VOL.14, NO.1, P.63-6, REF.37
350 ISSN 0883-7694, CODEN MRSBEA
400 HIGH T/SUB C/ OXIDE SUPERCONDUCTORS CAN BE PREPARED BY A VARIETY OF
400 NOVEL METALLURGICAL OR CERAMIC PROCESSING TECHNIQUES. FOR EXAMPLE,
400 FORMING METALLIC PRECURSORS OF YBA/SUB 2/CU/SUB 3/ OR REBA/SUB
400 2/CU/SUB 3/, WHERE RE IS A RARE EARTH ELEMENT, FOLLOWED BY OXIDATION
400 HAS YIELDED THE CORRESPONDING CERAMIC OXIDE IN PELLET, WIRE, AND THIN
400 FILM FORMS. CERAMIC FABRICATION TECHNIQUES SUCH AS DOCTOR-BLADE TAPE
400 CASTING AND SCREEN PRINTING HAVE BEEN UTILIZED TO SYNTHESIZE BOTH
400 TAPES AND THIN FILMS. IN ADDITION, IT IS LIKELY THAT NUMEROUS
400 LABORATORIES ARE DEVELOPING PROPRIETARY METHODS TO FABRICATE WIRE AND
400 OTHER FORMS BUT HAVE NOT PUBLISHED THESE RESULTS. THE AUTHORS REVIEW
400 SOME OF THE METHODS REPORTED SO FAR FOR PREPARING HIGH T/SUB C/
400 CERAMIC SUPERCONDUCTORS, AND DISCUSS ONE EXAMPLE OF A PROPRIETARY
400 METHOD BEING DEVELOPED AT ONE OF THE AUTHOR'S (LDW) LABORATORIES.
500 CERAMICS; DENSIFICATION; HIGH-TEMPERATURE SUPERCONDUCTORS; MATERIALS
500 PREPARATION.
510 FABRICATION; HIGH TEMPERATURE SUPERCONDUCTOR; METALLURGICAL
510 PROCESSING; PELLETS; THIN FILMS; SCREEN PRINTING; MELT-TEXTURED
510 GROWTH; SHOCK COMPACTION; WIRE FABRICATION; REVIEW; CERAMIC
510 PROCESSING; METALLIC PRECURSORS; OXIDATION; TAPES; PROPRIETARY
510 METHODS.
DOCUMENT= 1179
AUTH = EMERY
DT = 02
KN = B40891205716
LG = ENGL
SN = ISSN 0883-7694
YR = 89
000 3378681
002 B40891205716
010 JOURNAL PAPER; THEORETICAL.
100 PERSPECTIVES ON THE THEORY OF THE NEW HIGH T/SUB C/ SUPERCONDUCTING
100 OXIDES.
200 EMERY, V.J.
310 MRS BULL. (USA)
330 JAN. 1989. VOL.14, NO.1, P.67-71, REF.39
350 ISSN 0883-7694, CODEN MRSBEA
400 THE AUTHOR REVIEWS SOME OF THE MAIN TRENDS IN THE THEORY OF HIGH
400 T/SUB C/ SUPERCONDUCTIVITY. ELECTRONIC STRUCTURE, MAGNETISM, THE
400 SUPERCONDUCTION MECHANISM AND MANY-BODY THEORY ARE DISCUSSED.
500 BAND STRUCTURE OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC PROPERTIES OF SUBSTANCES;
500 MANY-BODY PROBLEMS; REVIEWS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ELECTRONIC STRUCTURE; MAGNETIC
510 PROPERTIES; REVIEW; MANY-BODY THEORY.
DOCUMENT= 1180
AUTH = REICH
DT = 02
KN = B40891205736
LG = ENGL
SN = ISSN 0028-0836
YR = 89
000 3378701
002 B40891205736
010 JOURNAL PAPER; APPLICATIONS, NEW DEVELOPMENT, EXPERIMENTAL.
100 SEPARATION OF PARAMAGNETIC AND DIAMAGNETIC MOLECULES USING HIGH-T/SUB
100 C/ SUPERCONDUCTING CERAMICS.
200 REICH, S. / CABASSO, I.
220 DEPT. OF MATER. RES., WEIZMANN INST. OF SCI., REHOVOT, ISRAEL
310 NATURE (UK)
330 23 MARCH 1989. VOL.338, NO.6213, P.330-2, REF.7
350 ISSN 0028-0836, CODEN NATUAS
400 WITH THE ADVENT OF HIGH-TEMPERATURE SUPERCONDUCTIVITY, THE SEARCH IS
400 ON FOR APPLICATIONS OF THESE MATERIALS. THE AUTHORS OUTLINE A NEW
400 METHOD FOR THE SEPARATION OF PARAMAGNETIC AND DIAMAGNETIC MOLECULES
400 USING THE REPULSIVE INTERACTION BETWEEN A MAGNETIC DIPOLE AND A
400 MICRO-CAVITY IN A CERAMIC MATERIAL WHICH IS IN THE SUPERCONDUCTING
400 STATE. THEY PRESENT EXPERIMENTS OF THE PERMEATION OF AIR THROUGH
400 YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / AND THROUGH BI/SUB 1.8/PB/SUB
400 0.2/CA/SUB 2/SR/SUB 2/CU/SUB 3/O/SUB X/ CERAMIC PELLETS. THESE
400 EXPERIMENTS SHOW THE PREFERENTIAL PERMEABILITY OF NITROGEN COMPARED
400 WITH THAT OF OXYGEN IN THE DIAMAGNETIC STATE OF THE SUPERCONDUCTORS
400 BELOW THE CRITICAL TRANSITION TEMPERATURE, T/SUB C/. THIS EFFECT IS
400 QUENCHED BY THE APPLICATION OF A LARGE ENOUGH EXTERNAL MAGNETIC
400 FIELD. AS FAR AS THEY KNOW IT IS THE FIRST APPLICATION OF THE
400 POROSITY OF THE CERAMIC SUPERCONDUCTORS.
500 CERAMICS; HIGH-TEMPERATURE SUPERCONDUCTORS; PERMEABILITY; POROUS
500 MATERIALS; SEPARATION.
510 PARAMAGNETIC MOLECULES; MAGNETIC FIELD QUENCHING; HIGH TEMPERATURE
510 SUPERCONDUCTORS; DIAMAGNETIC MOLECULES; SEPARATION; MICRO-CAVITY;
510 PERMEATION; AIR; POROSITY; CERAMIC SUPERCONDUCTORS; YBA/SUB 2/CU/SUB
510 3/O/SUB 7- DELTA /; BI/SUB 1.8/PB/SUB 0.2/CA/SUB 2/SR/SUB 2/CU/SUB
510 3/O/SUB X/; N/SUB 2/; O/SUB 2/.
550 N2/EL N/EL; O2/EL O/EL; YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS
550 Y/SS; BI1.8PB0.2CA2SR2CU3O/SS BI1.8/SS PB0.2/SS CA2/SS CU3/SS SR2/SS
550 BI/SS CA/SS CU/SS PB/SS SR/SS O/SS.
DOCUMENT= 1181
AUTH = AKIBA
DT = 02
KN = B40891205794
LG = JAPA
SN = ISSN 0369-8009
YR = 89
000 3378759
002 B40891205794
010 JOURNAL PAPER; EXPERIMENTAL.
100 ELECTROMAGNETIC MEMORY EFFECT IN SUPERCONDUCTING Y-BA-CU-O SYSTEM.
200 AKIBA, Y.; TITIROONGRUANG, W.; KUROSU, T.; IIDA, M.; NAKAMURA, T.
220 DEPT. OF ELECTRON., FAC. OF ENG., TOKAI UNIV., HIRATSUKA, JAPAN
310 OYO BUTURI (JAPAN)
330 JAN. 1989. VOL.58, NO.1, P.151-60, REF.3. (IN JAPANESE)
350 ISSN 0369-8009, CODEN OYBSA9
400 AN ELECTROMAGNETIC MEMORY EFFECT IN THE Y-BA-CU-O SYSTEM IS STUDIED.
400 IN THE MEASUREMENT OF CURRENT-VOLTAGE CHARACTERISTICS, A VOLTAGE DROP
400 ACROSS THE SUPERCONDUCTING SAMPLE IS OBSERVED ON APPLYING AN EXTERNAL
400 MAGNETIC FIELD. THE VOLTAGE DROP CONTINUES TO APPEAR AFTER THE
400 REMOVAL OF THE MAGNETIC FIELD. THIS PHENOMENON IS CONSIDERED AS A
400 NONVOLATILE MEMORY EFFECT. THE VOLTAGE DROP INCREASES WITH INCREASE
400 IN APPLIED MAGNETIC FLUX, BUT IT BECOMES CONSTANT AT ABOUT 10/SUP -2/
400 T. THE APPEARANCE OF THE VOLTAGE DROP IS ASCRIBED TO THE TRAPPING OF
400 MAGNETIC FLUX. DEPENDING ON THE DIRECTION OF APPLIED MAGNETIC FLUX
400 LESS THAN 2*10/SUP -3/ T, THE VOLTAGE DROP IN THE MEMORIZED SAMPLE
400 INCREASES OR DECREASES. THE FACT THAT THE MATERIAL USED IS POROUS AND
400 CONTAINS MANY GRAIN BOUNDARIES SUGGESTS A JUNGLEGYM-LIKE PATH IN A
400 CURRENT FLOW MODEL. THE MECHANISM OF THE MEMORY EFFECT CAN BE
400 EXPLAINED BY APPLYING THIS MODEL.
500 BARIUM COMPOUNDS; CRYOELECTRIC STORES; FLUX PINNING; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; MAGNETIC FLUX TRAPPING; POROUS
510 MATERIAL; ELECTROMAGNETIC MEMORY EFFECT; CURRENT-VOLTAGE
510 CHARACTERISTICS; VOLTAGE DROP; EXTERNAL MAGNETIC FIELD; NONVOLATILE
510 MEMORY EFFECT; GRAIN BOUNDARIES; JUNGLEGYM-LIKE PATH; CURRENT FLOW
510 MODEL; MECHANISM; Y-BA-CU-O.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1182
AUTH = WONG
DT = 02
KN = B40891205953
LG = ENGL
SN = ISSN 0375-9601
YR = 89
000 3378918
002 B40891205953
010 JOURNAL PAPER; THEORETICAL.
100 THEORETICAL DIFFERENCES IN FRACTIONAL CHARGE FLUX QUANTIZATION
100 BETWEEN THE ANION MODEL AND THE EXCITONIC ENHANCEMENT MODEL FOR HIGH
100 T/SUB C/ SUPERCONDUCTIVITY.
200 WONG, K.W. / CHING, W.Y.
220 DEPT. OF PHYS. ? ASTRON., KANSAS UNIV., LAWRENCE, KS, USA
310 PHYS. LETT. A (NETHERLANDS)
330 27 MARCH 1989. VOL.136, NO.3, P.167-70, REF.15
350 ISSN 0375-9601, CODEN PYLAAG
400 THE THEORETICAL ORIGINS OF FRACTIONAL CHARGE FLUX QUANTIZATION IN THE
400 ANION MODEL AND EXCITONIC ENHANCEMENT MODEL ARE DISCUSSED.
400 EXPERIMENTAL VERIFICATIONS ARE SUGGESTED.
500 EXCITONS; HIGH-TEMPERATURE SUPERCONDUCTORS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; FRACTIONAL CHARGE FLUX
510 QUANTIZATION; ANION MODEL; EXCITONIC ENHANCEMENT MODEL; HIGH T/SUB C/
510 SUPERCONDUCTIVITY.
DOCUMENT= 1183
AUTH = IVANCHEN
DT = 02
KN = B40891205954
LG = ENGL
SN = ISSN 0375-9601
YR = 89
000 3378919
002 B40891205954
010 JOURNAL PAPER; THEORETICAL.
100 CRITICAL BEHAVIOUR OF ORTHORHOMBIC HIGH T/SUB C/ SUPERCONDUCTING
100 SYSTEMS WITH D-PAIRING.
200 IVANCHENKO, YU.M.; LISYANSKII, A.A.; FILIPPOV, A.E.
220 PHYSICO-TECH. INST., ACAD. OF SCI., DONETSK, UKRAINIAN SSR, USSR
310 PHYS. LETT. A (NETHERLANDS)
330 27 MARCH 1989. VOL.136, NO.3, P.172-3, REF.12
350 ISSN 0375-9601, CODEN PYLAAG
400 THE PREDICTION OF POSSIBLE SUPERCONDUCTIVITY TRANSITION SPLITTING IN
400 ORTHORHOMBIC HIGH T/SUB C/ SUPERCONDUCTING SYSTEMS BASED ON THE
400 LANDAU THEORY IS TESTED BY THE RENORMALIZATION GROUP TECHNIQUE. IT IS
400 SHOWN THAT AT SMALL ORTHORHOMBICITY DELTA THIS SPLITTING IS ABSENT
400 AND APPEARS ONLY AT SOME DELTA /SUB MIN/.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; RENORMALISATION.
510 HIGH TEMPERATURE SUPERCONDUCTORS; CRITICAL BEHAVIOUR; ORTHORHOMBIC
510 HIGH T/SUB C/ SUPERCONDUCTING SYSTEMS; D-PAIRING; SUPERCONDUCTIVITY
510 TRANSITION SPLITTING; LANDAU THEORY; RENORMALIZATION GROUP TECHNIQUE.
DOCUMENT= 1184
AUTH = CHOI
DT = 02
KN = B40891206002
LG = ENGL
SN = ISSN 0031-9007
YR = 89
000 3378967
002 B40891206002
010 JOURNAL PAPER; THEORETICAL.
100 THEORETICAL STUDY OF A SUPERCONDUCTING-GLASS MODEL.
200 CHOI, H.; JOSE, J.V.
220 DEPT. OF PHYS., NORTHEASTERN UNIV., BOSTON, MA, USA
310 PHYS. REV. LETT. (USA)
330 16 JAN. 1989. VOL.62, NO.3, P.320-3, REF.25
350 ISSN 0031-9007, CODEN PRLTAO
400 THE NATURE OF THE METASTABLE MAGNETIC PROPERTIES OF A RANDOM
400 JOSEPHSON-JUNCTION ARRAY IN THE PRESENCE OF A CONSTANT TRANSVERSE
400 MAGNETIC FIELD IS STUDIED EXTENSIVELY BY MONTE CARLO SIMULATIONS. THE
400 QUENCHED MAGNETIZATION AND HELICITY MODULUS ARE CALCULATED AS A
400 FUNCTION OF TEMPERATURE, FIELD, AMOUNTS OF DISORDER, DIMENSIONALITY,
400 AND TIME. THE CALCULATED QUANTITIES ARE FOUND TO BE STRONGLY
400 THERMAL-HISTORY DEPENDENT, SIMILAR TO THE MAGNETIC PROPERTIES FOUND
400 IN HIGH-TEMPERATURE OXIDE SUPERCONDUCTORS. THE AUTHORS ALSO SUGGEST
400 TO TEST OF THIS PAPER IN ARTIFICIALLY MADE ARRAYS OF RANDOM JOSEPHSON
400 JUNCTIONS.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; JOSEPHSON EFFECT; MAGNETISATION;
500 MONTE CARLO METHODS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING-GLASS MODEL;
510 METASTABLE MAGNETIC PROPERTIES; RANDOM JOSEPHSON-JUNCTION ARRAY;
510 CONSTANT TRANSVERSE MAGNETIC FIELD; MONTE CARLO SIMULATIONS; QUENCHED
510 MAGNETIZATION; HELICITY MODULUS; THERMAL-HISTORY DEPENDENT;
510 HIGH-TEMPERATURE OXIDE SUPERCONDUCTORS.
DOCUMENT= 1185
AUTH = TYC
DT = 02
KN = B40891206071
LG = ENGL
SN = ISSN 0031-9007
YR = 89
000 3379036
002 B40891206071
010 JOURNAL PAPER; THEORETICAL.
100 DYNAMIC PROPERTIES OF A TWO-DIMENSIONAL HEISENBERG ANTIFERROMAGNET AT
100 LOW TEMPERATURES.
200 TYC, S.; HALPERIN, B.I. / CHAKRAVARTY, S.
220 JEFFERSON LAB. OF PHYS., HARVARD UNIV., CAMBRIDGE, MA, USA
310 PHYS. REV. LETT. (USA)
330 13 FEB. 1989. VOL.62, NO.7, P.835-8, REF.9
350 ISSN 0031-9007, CODEN PRLTAO
400 BY USING A COMBINATION OF HYDRODYNAMICS, SCALING, AND
400 RENORMALIZATION-GROUP ANALYSIS, AND A FIT TO THE SIMULATIONS OF A
400 CLASSICAL ROTOR MODEL, THE AUTHORS CAN PREDICT THE FORM OF THE
400 DYNAMIC STRUCTURE FACTOR S(K, OMEGA ) OF A TWO-DIMENSIONAL QUANTUM
400 HEISENBERG ANTIFERROMAGNET AT LOW TEMPERATURES, IF THE
400 ZERO-TEMPERATURE SPIN-STIFFNESS CONSTANT RHO /SUB S/ AND MAGNETIC
400 SUSCEPTIBILITY CHI /SUB PERPENDICULAR TO //SUP 0/ ARE KNOWN. THESE
400 RESULTS SHOULD BE APPLICABLE TO INELASTIC NEUTRON SCATTERING IN
400 STOICHIOMETRIC LA/SUB 2/CUO/SUB 4/ ABOVE ITS NEEL TEMPERATURE, WITH
400 ONLY RHO /SUB S/ AS AN ADJUSTABLE PARAMETER.
500 ANTIFERROMAGNETISM; HEISENBERG MODEL; RENORMALISATION.
510 DYNAMIC PROPERTIES; HIGH TEMPERATURE SUPERCONDUCTORS; TWO-DIMENSIONAL
510 HEISENBERG ANTIFERROMAGNET; LOW TEMPERATURES; HYDRODYNAMICS; SCALING;
510 RENORMALIZATION-GROUP ANALYSIS; CLASSICAL ROTOR MODEL; DYNAMIC
510 STRUCTURE FACTOR; ZERO-TEMPERATURE SPIN-STIFFNESS CONSTANT; MAGNETIC
510 SUSCEPTIBILITY; INELASTIC NEUTRON SCATTERING; NEEL TEMPERATURE;
510 LA/SUB 2/CUO/SUB 4/.
550 LA2CUO4/SS LA2/SS CU/SS LA/SS O4/SS O/SS.
DOCUMENT= 1186
AUTH = EVARESTO
DT = 02
KN = B40891206130
LG = ENGL
SN = ISSN 0370-1972
YR = 89
000 3379095
002 B40891206130
010 JOURNAL PAPER; EXPERIMENTAL.
100 BAND COREPRESENTATIONS OF MAGNETIC SPACE GROUPS.
200 EVARESTOV, R.A. / SMIRNOV, V.P.; EGOROV, S.A.
220 DEPT. OF QUANTUM CHEM., LENINGRAD STATE UNIV., USSR
310 PHYS. STATUS SOLIDI B (EAST GERMANY)
330 1 JAN. 1989. VOL.151, NO.1, P.275-82, REF.22
350 ISSN 0370-1972, CODEN PSSBBD
400 THE BAND COREPRESENTATIONS OF THE MAGNETIC SPACE GROUPS ARE
400 INTRODUCED; THE PROCEDURE OF THEIR GENERATION IS CONSIDERED. THE BAND
400 COREPRESENTATIONS ARE ESSENTIAL FOR THE SYMMETRY ANALYSIS OF PHONONS
400 AND MAGNONS IN MAGNETIC CRYSTALS AND FOR THE STUDY OF THE
400 MAGNON-PHONON HYBRIDIZATION. THE MAGNETIC STRUCTURES OF CUFES/SUB 2/
400 AND LA/SUB 2/CUO/SUB 4/ CRYSTALS ARE ANALYZED. IN THE
400 ANTIFERROMAGNETIC PHASE THESE CRYSTALS ARE DESCRIBED BY SHUBNIKOV
400 SPACE GROUPS OF DIFFERENT TYPES. THE BAND COREPRESENTATIONS FOR EACH
400 OF THESE GROUPS ARE TABULATED.
500 ANTIFERROMAGNETIC PROPERTIES OF SUBSTANCES; BAND MODEL OF MAGNETISM;
500 COPPER COMPOUNDS; LANTHANUM COMPOUNDS; MAGNETIC STRUCTURE;
500 PHONON-MAGNON INTERACTIONS.
510 MAGNETIC SPACE GROUPS; BAND COREPRESENTATIONS; SYMMETRY ANALYSIS;
510 PHONONS; MAGNONS; MAGNETIC CRYSTALS; MAGNON-PHONON HYBRIDIZATION;
510 MAGNETIC STRUCTURES; ANTIFERROMAGNETIC PHASE; SHUBNIKOV SPACE GROUPS;
510 CUFES/SUB 2/; LA/SUB 2/CUO/SUB 4/.
550 CUFES2/SS CU/SS FE/SS S2/SS S/SS; LA2CUO4/SS LA2/SS CU/SS LA/SS O4/SS
550 O/SS.
DOCUMENT= 1187
AUTH = PEKALA
DT = 02
KN = B40891206141
LG = ENGL
SN = ISSN 0370-1972
YR = 89
000 3379106
002 B40891206141
010 JOURNAL PAPER; EXPERIMENTAL.
100 NORMAL STATE THERMOELECTRIC POWER OF BI-SR-CA-CU-O SUPERCONDUCTORS.
200 PEKALA, M.; PEKALA, K.; PAJACZKOWSKA, A.
220 INST. OF PHYS., WARSAW TECH. UNIV., POLAND
310 PHYS. STATUS SOLIDI B (EAST GERMANY)
330 1 MARCH 1989. VOL.152, NO.1, P.K1-4, REF.14
350 ISSN 0370-1972, CODEN PSSBBD
400 THE PRESENT WORK WAS UNDERTAKEN IN ORDER TO GET A PRELIMINARY INSIGHT
400 INTO A NORMAL STATE ELECTRONIC TRANSPORT IN THE QUINARY BI-SR-CA-CU-O
400 SYSTEMS. THE THERMOELECTRIC POWER (TEP) METHOD WAS CHOSEN SINCE IT
400 OFFERS A HIGHLY SENSITIVE AND CONTACT INDEPENDENT PROBE TO STUDY THE
400 ELECTRONIC TRANSPORT IN THE SINTERED POLYCRYSTALLINE MATERIALS AND
400 ENABLES AN UNAMBIGUOUS DETERMINATION OF A SUPERCONDUCTING TRANSITION
400 BELOW WHICH THE TEP VOLTAGE DISAPPEARS.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; STRONTIUM COMPOUNDS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; THERMOELECTRIC EFFECTS IN SEMICONDUCTORS AND INSULATORS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; NORMAL STATE ELECTRONIC TRANSPORT;
510 THERMOELECTRIC POWER; SINTERED POLYCRYSTALLINE MATERIALS;
510 SUPERCONDUCTING TRANSITION; BI-SR-CA-CU-O SYSTEMS.
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1188
AUTH = HERRMANN
DT = 02
KN = B40891206142
LG = ENGL
SN = ISSN 0370-1972
YR = 89
000 3379107
002 B40891206142
010 JOURNAL PAPER; EXPERIMENTAL.
100 NORMAL STATE THERMOELECTRIC POWER OF BI-SR-CA-CU-O HIGH-T/SUB C/
100 SUPERCONDUCTOR.
200 HERRMANN, R.; PREPPERNAU, U.; RELLIN, C.; KRAPF, A.; DWELK, H.
220 SEKTION PHYS., HUMBOLDT-UNIV., BERLIN, EAST GERMANY
310 PHYS. STATUS SOLIDI B (EAST GERMANY)
330 1 MARCH 1989. VOL.152, NO.1, P.K5-8, REF.7
350 ISSN 0370-1972, CODEN PSSBBD
400 THE AUTHORS REPORT NORMAL STATE THERMOELECTRIC POWER MEASUREMENTS ON
400 THE SYSTEM BI-SR-CA-CU-O. OUTSTANDING FEATURES OF THE TEMPERATURE
400 DEPENDENCE OF THE THERMOPOWER ARE TWO SHARP JUMPS. ONE IS SITUATED AT
400 APPROXIMATELY 106 K AND THE OTHER AT APPROXIMATELY 80 K. DURING THE
400 LATTER, THE THERMOELECTRIC POWER OF THE SAMPLE TENDS TO ZERO BUT DOES
400 NOT COMPLETELY DISAPPEAR. THIS TEMPERATURE DEPENDENT BEHAVIOUR IS
400 INTERPRETED AS INDICATING A SUPERPOSITION OF AT LEAST TWO
400 SUPERCONDUCTING PHASES WITH DIFFERENT CRITICAL TEMPERATURES T/SUB C/.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; STRONTIUM COMPOUNDS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; THERMOELECTRIC EFFECTS IN SEMICONDUCTORS AND INSULATORS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; NORMAL STATE THERMOELECTRIC POWER;
510 CRITICAL TEMPERATURES; 80 K; 106 K; BI-SR-CA-CU-O.
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
560 TEMPERATURE 8.0 E+01 K; TEMPERATURE 1.06 E+02 K.
DOCUMENT= 1189
AUTH = GUSKOS
DT = 02
KN = B40891206143
LG = ENGL
SN = ISSN 0370-1972
YR = 89
000 3379108
002 B40891206143
010 JOURNAL PAPER; EXPERIMENTAL.
100 ON THE POSSIBILITY OF THE EXISTENCE OF CU/SUP 3+/ IONS IN HIGH-T/SUB
100 C/ SUPERCONDUCTING SAMPLES OF YBA/SUB 2/CU/SUB 3/O/SUB X/.
200 GUSKOS, N.; LEVENTOURI, T.; TRIKALINOS, C.; CALAMIOTOU, M.;
200 PARASKEVAS, S.M.; KURIATA, J.; SADLOWSKI, L.
220 ATHENS UNIV., GREECE
310 PHYS. STATUS SOLIDI B (EAST GERMANY)
330 1 MARCH 1989. VOL.152, NO.1, P.K9-12, REF.10
350 ISSN 0370-1972, CODEN PSSBBD
400 IT HAS BEEN SUGGESTED THAT HOPPING CU/SUP 3+/ IONS MAY BE INVOLVED IN
400 THE SUPERCONDUCTIVITY OF HIGH T/SUB C/ SUPERCONDUCTORS. IN ORDER TO
400 CHECK THIS PREDICTION, THE AUTHORS PREPARED TWO SAMPLES OF THE
400 Y-BA-CU-O SYSTEM (ONE SUPERCONDUCTING AND THE OTHER NOT) FOR EPR
400 MEASUREMENTS. THEY SUGGEST THAT THEIR RESULTS INDICATE CLEARLY THE
400 INVOLVEMENT OF THE FORMATION OF THE CU/SUP 3+/ IONS IN THE
400 SUPERCONDUCTIVITY OF THE Y-BA-CU-O SAMPLE.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; PARAMAGNETIC
500 RESONANCE OF IRON GROUP IONS AND IMPURITIES; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CU/SUP 3+/ IONS; EPR; YBA/SUB
510 2/CU/SUB 3/O/SUB X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1190
AUTH = LEMCKE
DT = 02
KN = B40891206235
LG = ENGL
SN = ISSN 0032-678X
YR = 89
000 3379200
002 B40891206235
010 JOURNAL PAPER; EXPERIMENTAL.
100 METALLOGRAPHICAL PREPARATION OF HIGH TEMPERATURE SUPERCONDUCTING
100 OXIDE MATERIALS.
200 LEMCKE, M.; ADLER, B.
220 FAC. VACUUMSCHMELZE GMBH, HANAU, WEST GERMANY
310 PRAKT. METALLOGR. (WEST GERMANY)
330 FEB. 1989. VOL.26, NO.2, P.53-8, REF.6. (IN ENGLISH GERMAN)
350 ISSN 0032-678X, CODEN PMTLA5
400 THE CHARACTERISATION OF THE MICROSTRUCTURE IS AN IMPORTANT FACTOR IN
400 UNDERSTANDING THE COMPLEX RELATIONSHIPS BETWEEN THE MICROSTRUCTURE
400 AND THE SUPERCONDUCTING PROPERTIES OF THE NEW HIGH TEMPERATURE
400 SUPERCONDUCTING OXIDE MATERIALS. WITH THE AID OF A NUMBER OF
400 EXAMPLES, THE TECHNIQUES OF PREPARATION AND THEIR USE IN PRACTICE IN
400 THE LIGHT MICROSCOPIC ANALYSIS OF THE MICROSTRUCTURE OF SINTERED
400 CERAMIC AND COMPOSITE WIRE SPECIMENS ARE ILLUSTRATED.
500 CERAMICS; CRYSTAL MICROSTRUCTURE; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 MATERIALS PREPARATION.
510 HIGH TEMPERATURE SUPERCONDUCTORS; METALLOGRAPHIC PREPARATION; OXIDE
510 MATERIALS; MICROSTRUCTURE; LIGHT MICROSCOPIC ANALYSIS; SINTERED
510 CERAMIC; COMPOSITE WIRE.
DOCUMENT= 1191
AUTH = RAVI
DT = 02
KN = B40891206243
LG = ENGL
SN = ISSN 0304-4289
YR = 88
000 3379208
002 B40891206243
010 JOURNAL PAPER; THEORETICAL.
100 LOW FIELD ANOMALY IN MAGNETIZATION CURVES.
200 RAVI KUMAR, G.; CHADDAH, P.
220 DIV. OF NUCL. PHYS., BHABHA ATOMIC RES. CENTRE, BOMBAY, INDIA
310 PRAMANA (INDIA)
330 DEC. 1988. VOL.31, NO.6, P.505-12, REF.14
350 ISSN 0304-4289, CODEN PRAMCI
400 THE AUTHORS PRESENT A CALCULATION OF THE ISOTHERMAL MAGNETIZATION
400 HYSTERESIS CURVES APPROPRIATE TO HIGH T/SUB C/ SUPERCONDUCTORS. THEY
400 DISCUSS THE NATURE OF THE LOW FIELD ANOMALY AS ONE GOES FROM THIS
400 STRONG PINNING CASE TO THE WEAK PINNING CASE. THEY SHOW THAT THE
400 SHAPE OF THE EQUILIBRIUM (THERMODYNAMIC) MAGNETIZATION CURVE IS
400 RECOVERED IN THE LIMIT OF J/SUB C/ APPROACHING ZERO.
500 FLUX PINNING; HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC HYSTERESIS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; ISOTHERMAL MAGNETIZATION
510 HYSTERESIS CURVES; HIGH T/SUB C/ SUPERCONDUCTORS; LOW FIELD ANOMALY;
510 STRONG PINNING CASE; WEAK PINNING CASE.
DOCUMENT= 1192
AUTH = WOLSKY
DT = 02
KN = B40891206407
LG = ENGL
SN = ISSN 0036-8733
YR = 89
000 3379372
002 B40891206407
010 JOURNAL PAPER; REVIEW, THEORETICAL, EXPERIMENTAL.
100 THE NEW SUPERCONDUCTORS: PROSPECTS FOR APPLICATIONS.
200 WOLSKY, A.M.; GIESE, R.F.; DANIELS, J.
220 ARGONNE NAT. LAB., IL, USA
310 SCI. AM. (USA)
330 FEB. 1989. VOL.260, NO.2, P.44-52, REF.0
350 ISSN 0036-8733, CODEN SCAMAC
400 THE AUTHORS CONSIDER THE FUTURE PROSPECTS FOR SUPERCONDUCTING
400 DEVICES. THEY DISCUSS SUPERMAGNETS, GENERATORS AND POWER LINES,
400 ELECTRICAL ENERGY STORAGE, LEVITATING TRAINS, INDUSTRIAL
400 APPLICATIONS, SUPERCONDUCTING COMPUTERS AND SQUIDS. THE THEORETICAL
400 LIMITS OF SUPERCONDUCTING PROPERTIES ARE STUDIED, ALONG WITH POSSIBLE
400 IMPROVEMENTS IN MATERIALS PROCESSING TECHNIQUES USED FOR
400 SUPERCONDUCTING MATERIALS.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING DEVICES.
510 HIGH TEMPERATURE SUPERCONDUCTORS; SUPERMAGNETS; GENERATORS; POWER
510 LINES; ELECTRICAL ENERGY STORAGE; LEVITATING TRAINS; INDUSTRIAL
510 APPLICATIONS; SUPERCONDUCTING COMPUTERS; SQUIDS; THEORETICAL LIMITS;
510 MATERIALS PROCESSING.
DOCUMENT= 1193
AUTH = XIA
DT = 02
KN = B40891206431
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379396
002 B40891206431
010 JOURNAL PAPER; EXPERIMENTAL.
100 PECULIAR BEHAVIOR OF HALL EFFECT ON SINGLE-PHASE BI/SUB 3/PBCA/SUB
100 3/SR/SUB 3/CU/SUB 4/O/SUB Y/.
200 XIA JIANSHENG; FANG MINGHU; HE ZHENHUI; WANG SHUNXI; CAO LIEZHAO;
200 ZHANG QIRUI / CHEN ZUYAO; CHEN XIANHUI; QIAN YITAI
220 DEPT. OF PHYS., UNIV. OF SCI. ? TECHNOL. OF CHINA, HEFEI, CHINA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.129-31, REF.12
350 ISSN 0038-1098, CODEN SSCOA4
400 THE TEMPERATURE DEPENDENCE OF THE HALL COEFFICIENT BETWEEN 50 AND 250
400 K IS MEASURED BY A STANDARD TECHNIQUE IN SINGLE PHASE BI/SUB
400 3/PBCA/SUB 3/SR/SUB 3/CU/SUB 4/O/SUB Y/. THE RELATION N(T)=N/SUB
400 0/(1+AT) IS WELL SATISFIED IN THE NORMAL STATE. THE CARRIER DENSITY N
400 IS ABOUT 3.09*10/SUP 21/ CM/SUP -3/ AT 250 K. THE POSITIVE VALUE OF
400 THE HALL COEFFICIENT INDICATES THAT THE MATERIAL DOMINATELY CONDUCTS
400 VIA HOLES. A LARGE ANOMALY OF R/SUB H/ IS OBSERVED BETWEEN 113 AND 90
400 K, THIS ANOMALY IS ASSOCIATED WITH THE MICROSTRUCTURE OF SAMPLE AND
400 ANALYSED IN TERMS OF A SIMPLE MODEL.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CARRIER DENSITY; HALL EFFECT;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LEAD COMPOUNDS; STRONTIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; HALL EFFECT; SINGLE-PHASE;
510 TEMPERATURE DEPENDENCE; NORMAL STATE; CARRIER DENSITY; ANOMALY;
510 MICROSTRUCTURE; 50 TO 250 K; BI/SUB 3/PBCA/SUB 3/SR/SUB 3/CU/SUB
510 4/O/SUB Y/.
550 BI3PBCA3SR3CU4O/SS BI3/SS CA3/SS CU4/SS SR3/SS BI/SS CA/SS CU/SS
550 PB/SS SR/SS O/SS.
560 TEMPERATURE 5.0 E+01 TO 2.5 E+02 K.
DOCUMENT= 1194
AUTH = CHEN
DT = 02
KN = B40891206432
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379397
002 B40891206432
010 JOURNAL PAPER; EXPERIMENTAL.
100 SUPERCONDUCTIVITY IN THE (BI,PB)-CA-SR-BA-CU-O SYSTEM.
200 CHEN ZUYAO; XIA JIANSHEN; CHEN JIAN; CHEN XIANHUI; QIAN YITAI; FAN
200 MINGHU; FAN CHENGGAO; YANG LI; ZHANG QIRUI
220 UNIV. OF SCI. ? TECHNOL. OF CHINA, HEFEI, CHINA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.133-5, REF.9
350 ISSN 0038-1098, CODEN SSCOA4
400 IN THE (BI,PB)-CA-SR-BA-CU-O SYSTEM, A RATHER LARGE ORTHORHOMBIC CELL
400 WITH A=5.4 A, B=26.9 A AND C=30.7 A HAVE BEEN FOUND. THE AC
400 SUSCEPTIBILITY MEASUREMENT SHOWS THAT THERE EXISTS ONLY ONE
400 SUPERCONDUCTING TRANSITION AT 110 K, THE ZERO-RESISTANCE TEMPERATURE
400 IS AS HIGH AS 106 K.
500 BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CRYSTAL
500 ATOMIC STRUCTURE OF INORGANIC COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LEAD COMPOUNDS; MAGNETIC SUSCEPTIBILITY; STRONTIUM
500 COMPOUNDS; SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CRITICAL TEMPERATURE; CRYSTAL
510 STRUCTURE; ORTHORHOMBIC CELL; AC SUSCEPTIBILITY; SUPERCONDUCTING
510 TRANSITION; ZERO-RESISTANCE TEMPERATURE; 110 K; 106 K;
510 (BIPB)-CA-SR-BA-CU-O.
550 BIPBCASRBACUO/SS BA/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS.
560 TEMPERATURE 1.1 E+02 K; TEMPERATURE 1.06 E+02 K.
DOCUMENT= 1195
AUTH = WILHELM
DT = 02
KN = B40891206433
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379398
002 B40891206433
010 JOURNAL PAPER; EXPERIMENTAL.
100 PREPARATION AND PROPERTIES OF SUPERCONDUCTING (T/SUB C/=114 K)
100 PB-DOPED BI-SR-CA-CU OXIDE.
200 WILHELM, M. / EIBL, O.
220 RES. LABS., SIEMENS AG, ERLANGEN, WEST GERMANY
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.137-40, REF.6
350 ISSN 0038-1098, CODEN SSCOA4
400 NOMINAL SUBSTITUTION OF PB FOR BI IN CERAMIC BI-SR-CA-CU OXIDE LEADS
400 TO A PHASE WITH A SUPERCONDUCTING TRANSITION AT T/SUB C/=114 K. THIS
400 NEW PHASE HAS LATTICE PARAMETERS A APPROXIMATELY=B=0.54 NM, C=3.78 NM
400 AND A STRUCTURAL MODULATION WITH WAVE VECTOR PARALLEL TO THE (010)
400 DIRECTION (Q/SUP -1/=4.7 NM). DEFECT FREE ZONES OF THIS PHASE ARE
400 LARGER, I.E. A FEW HUNDRED NANOMETERS, THAN IN UNDOPED BI/SUB
400 2/SR/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB 10+ DELTA /. PRELIMINARY RESULTS
400 ABOUT ELECTRICAL PROPERTIES, CHEMICAL COMPOSITION AND STRUCTURE OF
400 THIS NEW PHASE ARE PRESENTED.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CERAMICS; CRYSTAL ATOMIC
500 STRUCTURE OF INORGANIC COMPOUNDS; CRYSTAL MICROSTRUCTURE;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LEAD COMPOUNDS; POWDER TECHNOLOGY;
500 STRONTIUM COMPOUNDS; SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTOR; PREPARATION; CRYSTAL STRUCTURE;
510 MICROSTRUCTURE; CERAMIC; SUPERCONDUCTING TRANSITION; LATTICE
510 PARAMETERS; STRUCTURAL MODULATION; ELECTRICAL PROPERTIES; CHEMICAL
510 COMPOSITION; 114 K; BI-PB-SR-CA-CU-O.
550 BIPBSRCACUO/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS.
560 TEMPERATURE 1.14 E+02 K.
DOCUMENT= 1196
AUTH = XIA
DT = 02
KN = B40891206434
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379399
002 B40891206434
010 JOURNAL PAPER; EXPERIMENTAL.
100 THE LOW TEMPERATURE MOSSBAUER SPECTRA OF YBA/SUB 2/CU/SUB 2.88/FE/SUB
100 0.12/O/SUB 7-X/.
200 XIA, S.K.; ZHAO, Z.B.; WANG, C.R.; MA, R.Z.; CAO, G.H.; PING, J.Y.
220 DEPT. OF MATER. PHYS., BEIJING UNIV. OF SCI. ? TECHNOL., CHINA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.141-4, REF.17
350 ISSN 0038-1098, CODEN SSCOA4
400 THE OCCUPIED POSITION OF FE IN THE SUPERCONDUCTING PHASE OF FE-DOPED
400 YBA/SUB 2/CU/SUB 2.88/O/SUB 7-X/ WAS ESTIMATED BY POINT CHARGE MODEL.
400 THE MOSSBAUER SPECTRA WERE MEASURED IN THE TEMPERATURE RANGE FROM 78
400 K TO 273 K. LATTICE SOFTENINGS WERE FOUND NEAR 110 AND 220 K. THE
400 OBSERVED VARIATIONS OF HYPERFINE PARAMETERS CAN BE CONSIDERED TO BE
400 RELATED TO THE LATTICE SOFTENING NEAR 110 K. IT IS SUGGESTED THAT THE
400 LATTICE SOFTENING NEAR 110 K IS RELATED TO THE PEIERLS INSTABILITY OF
400 THE ONE-DIMENSIONAL CU(1)-O CHAINS.
500 BARIUM COMPOUNDS; CRYSTAL HYPERFINE FIELD INTERACTIONS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; MOSSBAUER EFFECT; PEIERLS
500 INSTABILITY; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; LATTICE SOFTENINGS; 1D CU-O CHAINS;
510 LOW TEMPERATURE MOSSBAUER SPECTRA; POINT CHARGE MODEL; HYPERFINE
510 PARAMETERS; PEIERLS INSTABILITY; 78 TO 273 K; YBA/SUB 2/CU/SUB
510 2.88/FE/SUB 0.12/O/SUB 7-X/.
550 YBA2CU2.88FE0.12O/SS CU2.88/SS FE0.12/SS BA2/SS BA/SS CU/SS FE/SS
550 O/SS Y/SS.
560 TEMPERATURE 7.8 E+01 TO 2.73 E+02 K.
DOCUMENT= 1197
AUTH = MARKERT
DT = 02
KN = B40891206435
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379400
002 B40891206435
010 JOURNAL PAPER; EXPERIMENTAL.
100 HIGH TEMPERATURE SUPERCONDUCTIVITY IN TH-DOPED ND/SUB 2/CUO/SUB 4-Y/.
200 MARKERT, J.T.; MAPLE, M.B.
220 DEPT. OF PHYS., CALIFORNIA UNIV., SAN DIEGO, LA JOLLA, CA, USA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.145-7, REF.7
350 ISSN 0038-1098, CODEN SSCOA4
400 THE AUTHORS HAVE DISCOVERED SUPERCONDUCTIVITY WITH AN ONSET AT
400 APPROXIMATELY 20 K IN THE ND/SUB 2-X/TH/SUB X/CUO/SUB 4-Y/ SYSTEM AT
400 X=0.15. THE SUPERCONDUCTIVITY APPEARS TO BE ASSOCIATED WITH ELECTRONS
400 IN THE CUO/SUB 2/ PLANES DONATED BY TETRAVALENT TH WHICH SUBSTITUTES
400 FOR TRIVALENT ND. THEY HAVE ALSO VERIFIED THE OCCURRENCE OF
400 SUPERCONDUCTIVITY IN THE ND/SUB 2-X/CE/SUB X/CUO/SUB 4-Y/ SYSTEM,
400 RECENTLY REPORTED BY TOKURA ET AL., WHERE THE SUPERCONDUCTIVITY IS
400 APPARENTLY DUE TO ELECTRONS DONATED BY TETRAVALENT, OR INTERMEDIATE
400 VALENT (BETWEEN +3 AND +4), CE WHICH SUBSTITUTES FOR THE TRIVALENT ND
400 ION. THESE RESULTS SUGGEST THAT HIGH T/SUB C/ SUPERCONDUCTIVITY IN
400 THE LAYERED COPPER OXIDE COMPOUNDS INVOLVING ELECTRONS IN THE CUO/SUB
400 2/ PLANES IS A GENERAL PHENOMENON.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; NEODYMIUM COMPOUNDS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; THORIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; CUO/SUB 2/ PLANES; CUO/SUB 2/
510 PLANES; 20 K; ND/SUB 2-X/TH/SUB X/CUO/SUB 4-Y/; ND/SUB 2-X/CE/SUB
510 X/CUO/SUB 4-Y/.
550 NDTHCUO/SS CU/SS ND/SS TH/SS O/SS; NDCECUO/SS CE/SS CU/SS ND/SS O/SS.
560 TEMPERATURE 2.0 E+01 K.
DOCUMENT= 1198
AUTH = SINGH
DT = 02
KN = B40891206436
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379401
002 B40891206436
010 JOURNAL PAPER; THEORETICAL.
100 A POSSIBLE MECHANISM FOR HIGH-TEMPERATURE SUPERCONDUCTIVITY:
100 APPLICATION TO BI AND TI COMPOUNDS.
200 SINGH, M. / SINHA, K.P.
220 DEPT. OF PHYS., UNIV. OF WESTERN ONTARIO, LONDON, ONT., CANADA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.149-51, REF.17
350 ISSN 0038-1098, CODEN SSCOA4
400 THE AUTHORS APPLIED THEIR PREVIOUS THEORY OF HIGH TEMPERATURE
400 SUPERCONDUCTIVITY TO BI AND TL COMPOUNDS IN THIS PAPER. THE THEORY
400 INVOLVES THE ROLE OF ELECTRON PAIRS IN THE SPIN SINGLET OF SPECIES
400 X/SUP UP ARROW DOWN ARROW /(BI/SUP 3+/(6S/SUP 2/), TL(6S/SUP 2/)
400 ETC.) AND THEIR VIRTUAL EXCITED STATE X/SUP 0/(BI/SUP 5+/(6S/SUP 0/),
400 TL/SUP 3+/(6S/SUP 0/), ETC.) IN THE PAIRING INTERACTION OF
400 QUASIHOLES. BI AND TL SPECIES PROVIDE ADDITIONAL CHANNELS OF KIND
400 (X/SUP UP ARROW DOWN ARROW / TO OR FROM X/SUP 0/) OWING TO THE CHARGE
400 FLUCTUATIONS. THEY TREATED THE TWO STATES OF THESE SPECIES LIKE A
400 TWO-LEVEL BOSE SYSTEM. THE AUTHORS USED THE PSEUDOSPIN FORMALISM TO
400 CALCULATE THE EXPRESSION FOR THE CRITICAL TEMPERATURE IN THIS PAPER.
400 THEY ALSO CALCULATED NUMERICALLY THE VALUE OF T/SUB C/ FOR BI AND TL
400 COMPOUNDS AND FOUND A GOOD AGREEMENT BETWEEN THEORY AND EXPERIMENT.
500 BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; STRONTIUM COMPOUNDS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; THALLIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CRITICAL TEMPERATURE; MECHANISM;
510 HIGH-TEMPERATURE SUPERCONDUCTIVITY; ELECTRON PAIRS; SPIN SINGLET;
510 VIRTUAL EXCITED STATE; PAIRING INTERACTION; QUASIHOLES; CHARGE
510 FLUCTUATIONS; TWO-LEVEL BOSE SYSTEM; PSEUDOSPIN FORMALISM; CRITICAL
510 TEMPERATURE; TLBACACUO; BISRCACUO.
550 TLBACACUO/SS BA/SS CA/SS CU/SS TL/SS O/SS; BISRCACUO/SS BI/SS CA/SS
550 CU/SS SR/SS O/SS.
DOCUMENT= 1199
AUTH = ELDRIDGE
DT = 02
KN = B40891206437
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379402
002 B40891206437
010 JOURNAL PAPER; THEORETICAL.
100 CALCULATED INFRARED FREQUENCY SHIFTS WHEN YTTRIUM IS REPLACED WITH
100 SAMARIUM IN YBA/SUB 2/CU/SUB 3/O/SUB 7/.
200 ELDRIDGE, J.E.; BATES, F.E.
220 DEPT. OF PHYS., BRITISH COLUMBIA UNIV., VANCOUVER, BC, CANADA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.153-7, REF.20
350 ISSN 0038-1098, CODEN SSCOA4
400 THE AUTHORS PRESENT RESULTS OF NORMAL-COORDINATE CALCULATIONS OF THE
400 ZERO-WAVEVECTOR INFRARED-ACTIVE UNGERADE MODES OF THE ORTHORHOMBIC
400 SUPERCONDUCTOR SMBA/SUB 2/CU/SUB 3/O/SUB 7/. THE FREQUENCY SHIFTS
400 FROM THOSE CALCULATED FOR YBA/SUB 2/CU/SUB 3/O/SUB 7/ ARE A RESULT
400 NOT ONLY OF THE MASS CHANGE BUT ALSO OF THE DIFFERENT STRUCTURES AND
400 FORCE CONSTANTS. THESE LATTER WERE OBTAINED FROM AN EMPIRICAL
400 RELATIONSHIP INVOLVING ELECTRONEGATIVITY AND INTERATOMIC DISTANCE.
400 THE SHIFTS WERE COMPARED WITH THOSE OBSERVED FOR THE CORRESPONDING
400 MODES IN THE SEMICONDUCTING TETRAGONAL COMPOUNDS, FOR WHICH MORE
400 EXTENSIVE AND ACCURATE DATA ARE AVAILABLE. GOOD OVERALL AGREEMENT IS
400 OBTAINED.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; INFRARED SPECTRA OF INORGANIC
500 SOLIDS; LATTICE DYNAMICS; SAMARIUM COMPOUNDS; SPECTRAL LINE SHIFT.
510 HIGH TEMPERATURE SUPERCONDUCTOR; INFRARED FREQUENCY SHIFTS;
510 NORMAL-COORDINATE CALCULATIONS; ZERO-WAVEVECTOR INFRARED-ACTIVE
510 UNGERADE MODES; ORTHORHOMBIC SUPERCONDUCTOR; MASS CHANGE; FORCE
510 CONSTANTS; ELECTRONEGATIVITY; INTERATOMIC DISTANCE; SMBA/SUB 2/CU/SUB
510 3/O/SUB 7/.
550 SMBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS SM/SS O/SS.
DOCUMENT= 1200
AUTH = KONSTANT
DT = 02
KN = B40891206438
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379403
002 B40891206438
010 JOURNAL PAPER; EXPERIMENTAL.
100 STRUCTURAL SINGULARITIES IN THE VICINITY OF SUPERCONDUCTIVE
100 TRANSITION IN YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / MATERIAL.
200 KONSTANTINOVIC, J.; DJORDJEVIC, Z. / PARETTE, G.; MENELLE, A.
220 LAB. OF SOLID STATE PHYS., BORIS KIDRIC INST. OF NUCL. SCI.,
220 BELGRADE, YUGOSLAVIA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.159-62, REF.15
350 ISSN 0038-1098, CODEN SSCOA4
400 THE AUTHORS PRESENT EXPERIMENTAL EVIDENCE FOR THE EXISTENCE OF
400 SINGULAR BEHAVIOUR OF THE CRYSTAL LATTICE OF YBA/SUB 2/CU/SUB 3/O/SUB
400 7- DELTA / SUPERCONDUCTING MATERIAL. THE SINGULARITIES WERE OBSERVED
400 IN THE INTENSITY OF THE (001), (010) AND (100) NEUTRON REFLECTIONS
400 BOTH BELOW AND ABOVE THE NORMAL TO SUPERCONDUCTIVE TRANSITION POINT,
400 INDICATING EXISTENCE OF PHASE SEPARATIONS INDUCED BY REORDERING OF
400 OXYGEN IONS IN THE BASAL PLANES OF THE LATTICE. THE RESULTS ARE IN
400 AGREEMENT WITH SOME RECENT THEORETICAL PREDICTIONS.
500 BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; NEUTRON DIFFRACTION EXAMINATION OF
500 MATERIALS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; STRUCTURAL SINGULARITIES;
510 SUPERCONDUCTIVE TRANSITION; CRYSTAL LATTICE; NEUTRON REFLECTIONS;
510 PHASE SEPARATIONS; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1201
AUTH = KONSTANT
DT = 02
KN = B40891206439
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379404
002 B40891206439
010 JOURNAL PAPER; EXPERIMENTAL.
100 STRUCTURAL TRANSFORMATIONS OF THE YBA/SUB 2/CU/SUB 3/O/SUB 6.84/
100 CRYSTAL LATTICE IN THE TEMPERATURE INTERVAL 9 K TO 300 K.
200 KONSTANTINOVIC, J. / PARETTE, G.; DJORDJEVIC, Z.; MENELLE, A.
220 LAB. OF SOLID STATE PHYS., BORIS KIDRIC INST. OF NUCL. SCI.,
220 BELGRADE, YUGOSLAVIA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.163-6, REF.5
350 ISSN 0038-1098, CODEN SSCOA4
400 REFINED NEUTRON DIFFRACTION MEASUREMENTS OF ATOMIC POSITIONS WITHIN
400 THE LATTICE OF YBA/SUB 2/CU/SUB 3/O/SUB 6.84/ SUPERCONDUCTIVE
400 MATERIAL REVEALED THAT THE UNIT CELL DOES NOT CONTRACT UNIFORMLY WITH
400 REDUCING TEMPERATURE. INSTEAD MOST OF THE C-AXIS SHRINKAGE OCCURS IN
400 THE REGION AROUND THE YTTRIUM ATOMS IN THE CENTRAL PART OF THE UNIT
400 CELL. ALSO, VOLUME OF THE PYRAMID OF OXYGEN ATOMS ENCLOSING THE CU(2)
400 ION WITH REDUCING TEMPERATURE SHRINKS AT A RATE ALMOST THREE TIMES
400 HIGHER THAN THE VOLUME OF THE WHOLE UNIT CELL. AT THE SAME TIME,
400 BARIUM ATOMS EXHIBIT A CYCLE SHIFT WITH THEIR RELATIVE SEPARATION
400 FROM THE CU(1) PLANES BEING FIRST REDUCED IN THE INTERVAL BETWEEN 250
400 K AND 150 K AND THEN INCREASED BACK ALMOST TO THE ORIGINAL VALUE
400 BETWEEN 150 K AND 80 K. IF ANALYSED IN THE CONTEXT OF POSSIBLE
400 INFLUENCE ON THE ELECTRONIC STATES OF THE MATERIAL, THE ABOVE
400 STRUCTURAL TRANSFORMATIONS MIGHT GIVE A CLUE FOR THE EXPLANATION OF
400 THE APPEARANCE OF THE HIGH TEMPERATURE SUPERCONDUCTIVE TRANSITION.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; NEUTRON
500 DIFFRACTION EXAMINATION OF MATERIALS; SOLID-STATE PHASE
500 TRANSFORMATIONS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; STRUCTURAL TRANSFORMATIONS; NEUTRON
510 DIFFRACTION; ATOMIC POSITIONS; UNIT CELL; C-AXIS SHRINKAGE; 9 TO 300
510 K; YBA/SUB 2/CU/SUB 3/O/SUB 6.84/ CRYSTAL LATTICE.
550 YBA2CU3O6.84/SS O6.84/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 9.0 E+00 TO 3.0 E+02 K.
DOCUMENT= 1202
AUTH = JIANG-TS
DT = 02
KN = B40891206440
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379405
002 B40891206440
010 JOURNAL PAPER; EXPERIMENTAL.
100 LOW-TEMPERATURE EPR OF SOME CUPRIC COMPOUNDS IN THE Y-BA-CU-O SYSTEM.
200 JIANG-TSU YU; JONG GEN HWANG; CHRONG-CHU TSAI / LII, K.H.
220 INST. OF PHYS., NAT. TAIWAN NORMAL UNIV., TAIPEI, TAIWAN
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.167-71, REF.16
350 ISSN 0038-1098, CODEN SSCOA4
400 THE EPR SPECTRUM OF BACUO/SUB 2/, Y/SUB 2/CU/SUB 2/O/SUB 5/, Y/SUB
400 2/BACUO/SUB 5/ AND AL/SUB 2/CUO/SUB 4/ AT TEMPERATURES BETWEEN 3.6 K
400 AND 300 K ARE REPORTED, WHICH CAN BE USED AS SIGNATURES TO IDENTIFY
400 THE PRESENCE OF THESE COMPOUNDS AS TRACE IMPURITIES IN THE Y-BA-CU-O
400 HIGH-T/SUB C/ SUPERCONDUCTORS.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; IMPURITIES;
500 PARAMAGNETIC RESONANCE OF IRON GROUP IONS AND IMPURITIES; YTTRIUM
500 COMPOUNDS.
510 LOW TEMPERATURE EPR; HIGH TEMPERATURE SUPERCONDUCTORS; TRACE
510 IMPURITIES; HIGH-T/SUB C/ SUPERCONDUCTORS; 3.6 TO 300 K; Y-BA-CU-O;
510 BACUO/SUB 2/; Y/SUB 2/CU/SUB 2/O/SUB 5/; Y/SUB 2/BACUO/SUB 5/; AL/SUB
510 2/CUO/SUB 4/.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS; BACUO2/SS BA/SS CU/SS O2/SS O/SS;
550 Y2CU2O5/SS CU2/SS CU/SS O5/SS Y2/SS O/SS Y/SS; Y2BACUO5/SS BA/SS
550 CU/SS O5/SS Y2/SS O/SS Y/SS; AL2CUO4/SS AL2/SS AL/SS CU/SS O4/SS
550 O/SS.
560 TEMPERATURE 3.6 E+00 TO 3.0 E+02 K.
DOCUMENT= 1203
AUTH = OWENS
DT = 02
KN = B40891206441
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3379406
002 B40891206441
010 JOURNAL PAPER; THEORETICAL.
100 PARAMAGNETIC RESONANCE EVIDENCE FOR ONE DIMENSIONAL ANTIFERROMAGNETIC
100 ORDERING FLUCTUATIONS IN THE SUPERCONDUCTING PHASE OF YBA/SUB
100 2/CU/SUB 3/O/SUB 6+X/.
200 OWENS, F.J.
220 ENERGETIC MATER. LAB., ARDEC, DOVER, NJ, USA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.2, P.173-5, REF.17
350 ISSN 0038-1098, CODEN SSCOA4
400 IT IS SHOWN THAT THE LARGE ANOMALOUS G SHIFT AND LINE BROADENING OF
400 THE EPR SPECTRUM OF CU/SUP 2+/ WITH LOWERING TEMPERATURE IN THE
400 SUPERCONDUCTING PHASE OF YBA/SUB 2/CU/SUB 3/O/SUB 6+X/ IS CONSISTENT
400 WITH THE ONSET OF ONE DIMENSIONAL ANTIFERROMAGNETIC SHORT RANGE
400 ORDERING FLUCTUATIONS OF THE CU/SUP 2+/ SPINS IN THE CHAINS ALONG THE
400 B AXIS OF THE ORTHORHOMBIC UNIT CELL. THE MAGNITUDE AND DIRECTION OF
400 THE G SHIFT CAN BE ACCOUNTED FOR BY THE THEORY OF NAGATA AND TAZUKE
400 (1972) FOR THE EFFECT OF SPIN FLUCTUATIONS ON THE EPR SPECTRUM OF A
400 PARAMAGNETIC ION IN A ONE DIMENSIONAL CLASSICAL HEISENBERG SPIN
400 SYSTEM.
500 BARIUM COMPOUNDS; EPR LINE BREADTH; FLUCTUATIONS IN SUPERCONDUCTORS;
500 G-FACTOR; HEISENBERG MODEL; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 PARAMAGNETIC RESONANCE OF IRON GROUP IONS AND IMPURITIES; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ONE DIMENSIONAL ANTIFERROMAGNETIC
510 ORDERING FLUCTUATIONS; SUPERCONDUCTING PHASE; G SHIFT; LINE
510 BROADENING; EPR SPECTRUM; CU/SUP 2+/; ORTHORHOMBIC UNIT CELL; ONE
510 DIMENSIONAL CLASSICAL HEISENBERG SPIN SYSTEM; YBA/SUB 2/CU/SUB
510 3/O/SUB 6+X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1204
AUTH = KOPELEVI
DT = 02
KN = B40891206534
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3379499
002 B40891206534
010 JOURNAL PAPER; EXPERIMENTAL.
100 CRITICAL PARAMETERS OF THE SUPERCONDUCTOR YBA/SUB 2/CU/SUB 3/O/SUB 7-
100 DELTA /.
200 KOPELEVICH, YA.V.; LEMANOV, V.V.; SONIN, E.B.; SYRNIKOV, P.P.
220 A.F. IOFFE PHYSICOTECH. INST., LENINGRAD, USSR
310 FIZ. TVERD. TELA (USSR)
330 AUG. 1988. VOL.30, NO.8, P.2432-6, REF.8
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). AUG. 1988. VOL.30,
331 NO.8, P.1402-4. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 THE TEMPERATURE DEPENDENCE OF THE RESISTANCE, THE VOLT-AMPERE
400 CHARACTERISTIC, THE CRITICAL MAGNETIC FIELD AND CURRENT OF CERAMIC
400 YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / SAMPLES WERE INVESTIGATED. THE
400 DEPENDENCE OF THE CRITICAL CURRENT ON THE SAMPLE THICKNESS FURNISHES
400 EVIDENCE THAT THE SUPERCONDUCTING CURRENT IS DISTRIBUTED THROUGHOUT
400 THE SPECIMEN CROSS SECTION. THE LOW VALUES OF THE CRITICAL CURRENT
400 DENSITY ARE EXPLAINED BY THE PRESENCE OF MULTIPLE WEAK LINKS, CAUSING
400 THE SUPERCONDUCTOR TO GO INTO A MIXED STATE IN MAGNETIC FIELDS THAT
400 ARE SMALLER THAN THAT OF THE EARTH.
500 BARIUM COMPOUNDS; CRITICAL CURRENT DENSITY (SUPERCONDUCTIVITY);
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING CRITICAL FIELD;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; TEMPERATURE DEPENDENCE; RESISTANCE;
510 VOLT-AMPERE CHARACTERISTIC; CRITICAL MAGNETIC FIELD; CRITICAL
510 CURRENT; CRITICAL CURRENT DENSITY; MULTIPLE WEAK LINKS; MIXED STATE;
510 CERAMIC YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1205
AUTH = BARABANO
DT = 02
KN = B40891206535
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3379500
002 B40891206535
010 JOURNAL PAPER; THEORETICAL.
100 THEORY OF THE GROUND STATE AND OF ELEMENTARY EXCITATIONS IN
100 TWO-DIMENSIONAL HUBBARD MODEL.
200 BARABANOV, A.F.; MAKSIMOV, L.A.; MIKHEENKOV, A.V.
220 L.F. VERESHCHAGIN INST. OF HIGH-PRESSURE PHYS., ACAD. OF SCI.,
220 TROITSK, USSR
310 FIZ. TVERD. TELA (USSR)
330 AUG. 1988. VOL.30, NO.8, P.2518-20, REF.10
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). AUG. 1988. VOL.30,
331 NO.8, P.1449-50. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 HIGH TEMPERATURE SUPERCONDUCTIVITY MAY BE DESCRIBED THEORETICALLY ON
400 THE BASIS OF THE HUBBARD MODEL FOR A SQUARE LATTICE. THE AUTHORS
400 DEVELOP THE RESONATING VALENCE BOND METHOD FOR THE NONDEGENERATE
400 HUBBARD MODEL BY CONSTRUCTING RESONANCE STATES FOR SQUARE BLOCKS
400 CONSISTING OF FOUR SITES.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; HUBBARD MODEL.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; GROUND STATE; ELEMENTARY
510 EXCITATIONS; SQUARE LATTICE; RESONATING VALENCE BOND; NONDEGENERATE
510 HUBBARD MODEL.
DOCUMENT= 1206
AUTH = GOLOVASH
DT = 02
KN = B40891206536
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3379501
002 B40891206536
010 JOURNAL PAPER; EXPERIMENTAL.
100 EFFECT OF EXPOSURE TO NITROGEN VAPOR ON THE TRANSITION TEMPERATURE OF
100 THE SUPERCONDUCTOR YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
200 GOLOVASHKIN, A.I.; LEVCHENKO, I.S.; MOTULEVICH, G.P.; POLUKHINA, L.M.
220 P.N. LEBEDEV PHYS. INST., ACAD. OF SCI., MOSCOW, USSR
310 FIZ. TVERD. TELA (USSR)
330 AUG. 1988. VOL.30, NO.8, P.2520-3, REF.3
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). AUG. 1988. VOL.30,
331 NO.8, P.1451-2. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 ONE OF THE MAIN PROBLEMS CONCERNING THE APPLICATION OF THE NEW
400 HIGH-TEMPERATURE SUPERCONDUCTORS IS THE PROBLEM OF THEIR STABILITY.
400 THE AUTHORS HAVE STUDIED THE INSTABILITY ARISING FROM EXPOSURE OF THE
400 SUPERCONDUCTOR YBA/SUB 2/.CU/SUB 3/O/SUB 7- DELTA / TO NITROGEN VAPOR
400 AT DIFFERENT TEMPERATURES. THE AUTHORS OBSERVED AN ENHANCEMENT EFFECT
400 IN THE TRANSITION TEMPERATURE T/SUB C/ UPON HEATING THE SAMPLES IN
400 N/SUB 2/ VAPOUR AT T>155 K. THEY ATTRIBUTE THE EFFECT TO THE
400 FORMATION OF AN ANOMALOUS STRUCTURE OF OXYGEN VACANCIES IN YBA/SUB
400 2/CU/SUB 3/O/SUB 7- DELTA /.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING
500 TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; O VACANCIES; INSTABILITY; TRANSITION
510 TEMPERATURE; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /; N/SUB 2/ VAPOUR.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; N2/EL N/EL.
DOCUMENT= 1207
AUTH = GLAZKOV
DT = 02
KN = B40891206537
LG = ENGL
SN = ISSN 0044-4510
YR = 88
000 3379502
002 B40891206537
010 JOURNAL PAPER; EXPERIMENTAL.
100 CRYSTAL STRUCTURE OF THE SUPERCONDUCTING COMPOUND LABA/SUB 2/CU/SUB
100 3/O/SUB 7/.
200 GLAZKOV, V.P.; ZIBROV, I.P.; IRODOVA, A.V.; SOMENKOV, V.A.; STISHOV,
200 S.M.; SHAPIRO, A.YA.; SHIL'SHTEIN, S.SH.
220 KURCHATOV ATOMIC ENERGY INST. ? CRYSTALLOGR. INST., ACAD. OF SCI.,
220 USSR
310 ZH. EKSP. TEOR. FIZ. (USSR)
330 JULY 1988. VOL.94, NO.7, P.298-300, REF.11
331 ENGLISH TRANSLATION: SOV. PHYS.-JETP (USA). JULY 1988. VOL.67, NO.7,
331 P.1465-6. CODEN SPHJAR. ISSN 0038-5646
350 ISSN 0044-4510, CODEN ZETFA7
400 NEUTRON DIFFRACTION IS USED TO DETERMINE THE CRYSTAL STRUCTURE OF THE
400 SUPERCONDUCTING OXIDE LABA/SUB 2/CU/SUB 3/O/SUB 7/ (SPACE GROUP D/SUB
400 4H//SUP 1/). THE STRUCTURES OF LABA/SUB 2/CU/SUB 3/O/SUB 7/ AND
400 LABA/SUB 2/CU/SUB 3/O/SUB 7-Y/ ARE COMPARED. THE CONNECTION BETWEEN
400 THE STRUCTURE PROPERTIES AND THE SUPERCONDUCTIVITY OF THE OXIDES
400 RBA/SUB 2/CU/SUB 3/O/SUB X/ IS DISCUSSED.
500 BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM COMPOUNDS; NEUTRON
500 DIFFRACTION EXAMINATION OF MATERIALS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; NEUTRON DIFFRACTION; CRYSTAL
510 STRUCTURE; LABA/SUB 2/CU/SUB 3/O/SUB 7-Y/; LABA/SUB 2/CU/SUB 3/O/SUB
510 7/.
550 LABA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS LA/SS O7/SS O/SS.
DOCUMENT= 1208
AUTH = BULAEVSK
DT = 02
KN = B40891206538
LG = ENGL
SN = ISSN 0044-4510
YR = 88
000 3379503
002 B40891206538
010 JOURNAL PAPER; THEORETICAL.
100 MACROSCOPIC THEORY OF SUPERCONDUCTORS WITH SMALL COHERENCE LENGTH.
200 BULAEVSKII, L.N.; GINZBURG, V.L.; SOBYANIN, A.A.
220 P.N. LEBEDEV PHYS. INST., ACAD. OF SCI., USSR
310 ZH. EKSP. TEOR. FIZ. (USSR)
330 JULY 1988. VOL.94, NO.7, P.355-75, REF.44
331 ENGLISH TRANSLATION: SOV. PHYS.-JETP (USA). JULY 1988. VOL.67, NO.7,
331 P.1499-510. CODEN SPHJAR. ISSN 0038-5646
350 ISSN 0044-4510, CODEN ZETFA7
400 ONE OF THE MAIN DISTINGUISHING FEATURES OF THE NOW KNOWN CLASS OF
400 HIGH-TEMPERATURE SUPERCONDUCTORS (HTS) IS THAT THE SUPERCONDUCTING
400 COHERENCE LENGTH XI /SUB 0/ EXTRAPOLATED TO ZERO TEMPERATURE IS SMALL
400 (IN CONTRAST TO ORDINARY SUPERCONDUCTORS, FOR WHICH IT IS COMPARABLE
400 TO THE AVERAGE INTERATOMIC OR INTERELECTRONIC DISTANCE D). THIS
400 CIRCUMSTANCE FOREORDAINS THE IMPORTANCE OF TAKING INTO ACCOUNT, FOR
400 HTS, THE FLUCTUATIONS OF THE ORDER PARAMETER, NAMELY THE MACROSCOPIC
400 WAVE FUNCTION PSI = ETA EXP (I PHI ). A SECOND IMPORTANT FEATURE OF
400 THE INVESTIGATED HTS IS THE QUITE STRONG ANISOTROPY OF THEIR
400 PRINCIPAL SUPERCONDUCTING CHARACTERISTICS. THE PROPERTIES OF
400 ANISOTROPIC SUPERCONDUCTORS WITH SMALL RATIO XI /SUB 0//D ARE
400 DISCUSSED HERE FROM THREE STANDPOINTS: (1) FROM THE STANDPOINT OF THE
400 USUAL MACROSCOPIC GINZBURG-LANDAU OR THE PSI THEORY OF
400 SUPERCONDUCTIVITY, IN WHICH THERMAL FLUCTUATIONS OF PSI ARE NOT TAKEN
400 INTO ACCOUNT; (2) IN THE FRAMEWORK THE SAME THEORY, WITH ACCOUNT
400 TAKEN OF SMALL FLUCTUATION CORRECTIONS; (3) ON THE BASIS OF THE
400 GENERALIZED MACROSCOPIC PSI THEORY OF SUPERCONDUCTIVITY, INTENDED FOR
400 USE IN THE CRITICAL REGION NEAR T/SUB C/ AND IN THE ANALOG OF THE
400 GENERALIZED PSI THEORY OF SUPERFLUIDITY OF HELIUM II NEAR THE PSI
400 POINT. CONSIDERED IN ADDITION IS THE CASE OF VERY STRONGLY
400 ANISOTROPIC (LAYERED) SUPERCONDUCTORS FOR THE DESCRIPTION OF THE
400 SUPERCONDUCTING PROPERTIES OF WHICH BY THE MACROSCOPIC APPROACH IT IS
400 NECESSARY TO CHANGE FROM LOCAL DIFFERENTIAL EQUATIONS TO
400 DIFFERENTIAL-DIFFERENCE EQUATIONS. IN ALL CASES, BASIC EQUATIONS ARE
400 GIVEN FOR THE MOST IMPORTANT OBSERVED CHARACTERISTICS OF
400 SUPERCONDUCTORS IN TERMS OF A SMALL NUMBER OF PHENOMENOLOGICAL
400 PARAMETERS OF THE THEORY. THE THEORETICAL RESULTS ARE COMPARED WITH
400 AVAILABLE EXPERIMENTAL DATA FOR YBA/SUB 2/CU/SUB 2/O/SUB 7-X/ SINGLE
400 CRYSTALS.
500 COHERENCE LENGTH; FLUCTUATIONS IN SUPERCONDUCTORS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS.
510 HIGH-TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING COHERENCE LENGTH;
510 ORDER PARAMETER; MACROSCOPIC WAVE FUNCTION; THERMAL FLUCTUATIONS;
510 CRITICAL REGION; YBA/SUB 2/CU/SUB 2/O/SUB 7-X/.
550 YBA2CU2O/SS BA2/SS CU2/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1209
AUTH = LIMONOV
DT = 02
KN = B40891206645
LG = ENGL
SN = ISSN 0320-0108
YR = 88
000 3379610
002 B40891206645
010 JOURNAL PAPER; EXPERIMENTAL.
100 RAMAN SCATTERING IN SINGLE-PHASE YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /
100 CERAMIC.
200 LIMONOV, M.F.; MARKOV, YU.F.; POLLERT, E.; TRISKA, A.
220 A.F. IOFFE PHYSICOTECH. INST., ACAD. OF SCI., LENINGRAD, USSR
310 PIS'MA ZH. TEKH. FIZ. (USSR)
330 JULY 1988. VOL.14, NO.13-14, P.1235-8, REF.7
331 ENGLISH TRANSLATION: SOV. TECH. PHYS. LETT. (USA). JULY 1988. VOL.14,
331 NO.7, P.541-2. CODEN STPLD2. ISSN 0360-120X
350 ISSN 0320-0108, CODEN PZTFDD
400 THE AUTHORS STUDY THE RAMAN SPECTRA OF CERAMICS OF THE COMPOSITION
400 YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /, WHERE DELTA APPROXIMATELY 0.37.
400 THE CERAMICS WERE SYNTHESIZED BY SINTERING Y/SUB 2/O/SUB 3/, CUO, AND
400 BACO/SUB 3/ IN AN OXYGEN ATMOSPHERE FOR 70 H AT T=1220 K. THE
400 COMPOUNDS WHICH RESULTED EXHIBITED A SHARP SUPERCONDUCTING TRANSITION
400 (OF TEMPERATURE WIDTH DELTA T<1 K) AT T/SUB C/=92 K. THE PHASE
400 TRANSITION FROM THE HIGH-TEMPERATURE TETRAGONAL PHASE TO THE
400 ORTHORHOMBIC PHASE, D/SUB 4H/ TO D/SUB 2H/, OCCURRED IN THE
400 TEMPERATURE RANGE 830-890 K AND WAS STUDIED BY AN X-RAY STRUCTURAL
400 METHOD. FROM X-RAY DATA AND NEUTRON-DIFFRACTION EXPERIMENTS, THE
400 LATTICE CONSTANTS, THE COORDINATES OF THE ATOMS, AND THE DISTRIBUTION
400 OF ATOMS AMONG OXYGEN POSITIONS HAVE BEEN DETERMINED.
500 BARIUM COMPOUNDS; CERAMICS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC
500 COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; NEUTRON DIFFRACTION
500 EXAMINATION OF MATERIALS; RAMAN SPECTRA OF INORGANIC SOLIDS;
500 SOLID-STATE PHASE TRANSFORMATIONS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; X-RAY DIFFRACTION; RAMAN SPECTRA;
510 CERAMICS; SUPERCONDUCTING TRANSITION; PHASE TRANSITION; TETRAGONAL
510 PHASE; ORTHORHOMBIC PHASE; NEUTRON-DIFFRACTION; LATTICE CONSTANTS; 92
510 K; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 9.2 E+01 K.
DOCUMENT= 1210
AUTH = VESNIN
DT = 02
KN = B40891206646
LG = ENGL
SN = ISSN 0320-0108
YR = 88
000 3379611
002 B40891206646
010 JOURNAL PAPER; EXPERIMENTAL.
100 PARAMAGNETIC RESONANCE IN HIGH-TEMPERATURE SUPERCONDUCTORS (AT WEAK
100 MAGNETIC FIELDS).
200 VESNIN, YU.I.; ISTOMIN, V.E.; KOSTSOV, E.G.
220 INST. OF AUTOM. ? ELECTROMETRY, ACAD. OF SCI., NOVOSIBIRSK, USSR
310 PIS'MA ZH. TEKH. FIZ. (USSR)
330 JULY 1988. VOL.14, NO.13-14, P.1241-5, REF.13
331 ENGLISH TRANSLATION: SOV. TECH. PHYS. LETT. (USA). JULY 1988. VOL.14,
331 NO.7, P.544-5. CODEN STPLD2. ISSN 0360-120X
350 ISSN 0320-0108, CODEN PZTFDD
400 IT HAS BEEN ESTABLISHED PREVIOUSLY THAT IN Y-BA-CU-O AND EU-BA-CU-O
400 SUPERCONDUCTORS AT TEMPERATURES T=77-93 K IN WEAK MAGNETIC FIELDS A
400 PARAMAGNETIC ABSORPTION LINE IS OBSERVED, HAVING THE DYSON SHAPE
400 TYPICAL OF FREE CHARGE CARRIERS AND HAVING AN INTENSITY WHICH
400 CORRELATES WITH THE BEHAVIOR OF THE RESISTANCE OF THE SAMPLE AS T IS
400 CHANGED. A SIMILAR ABSORPTION LINE HAS BEEN DESCRIBED IN SEVERAL
400 OTHER PAPERS, BUT ITS APPEARANCE HAS BEEN LINKED WITH EITHER
400 JOSEPHSON JUNCTIONS OR A MANIFESTATION OF PARAELECTRIC RESONANCE. THE
400 AUTHORS STUDY THE BASIC CHARACTERISTICS OF THIS PART OF THE
400 PARAMAGNETIC-RESONANCE SPECTRUM OF YBA/SUB 2/CU/SUB 3/O/SUB Y/
400 CERAMICS.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; PARAMAGNETIC
500 RESONANCE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; WEAK MAGNETIC FIELDS; ABSORPTION
510 LINE; RESISTANCE; PARAMAGNETIC-RESONANCE SPECTRUM; YBA/SUB 2/CU/SUB
510 3/O/SUB Y/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1211
AUTH = GOLOVASH
DT = 02
KN = B40891206647
LG = ENGL
SN = ISSN 0320-0108
YR = 88
000 3379612
002 B40891206647
010 JOURNAL PAPER; EXPERIMENTAL.
100 JOSEPHSON EFFECT IN THIN FILMS OF HIGH-TEMPERATURE SUPERCONDUCTORS AT
100 T=77 K.
200 GOLOVASHKIN, A.I.; GUDKOV, A.L.; KRASNOSVOBODTSEV, S.I.; KUZ'MIN,
200 L.S.; LIKHAREV, K.K.; MASLENNIKOV, YU.V.; PASHKIN, YU.A.; PECHEN',
200 E.V.; SNIGIREV, O.V.
310 PIS'MA ZH. TEKH. FIZ. (USSR)
330 JULY 1988. VOL.14, NO.13-14, P.1256-60, REF.7
331 ENGLISH TRANSLATION: SOV. TECH. PHYS. LETT. (USA). JULY 1988. VOL.14,
331 NO.7, P.549-50. CODEN STPLD2. ISSN 0360-120X
350 ISSN 0320-0108, CODEN PZTFDD
400 THE AUTHORS SHOW THAT BY USING THIN FILMS OF HIGH-TEMPERATURE
400 SUPERCONDUCTORS WITH RELATIVELY HIGH VALUES OF THE CRITICAL CURRENT
400 DENSITY AND EMPLOYING ORDINARY METHODS OF DIRECT LITHOGRAPHY ONE CAN
400 FABRICATE JOSEPHSON JUNCTIONS WITH RELATIVELY LARGE VALUES OF V/SUB
400 C/ (UP TO AT LEAST 0.1 MV AT V=77 K). SUCH JUNCTIONS CAN BE USED TO
400 ADVANTAGE IN DEVICES WITH A LOW DEGREE OF INTEGRATION, INCLUDING
400 SQUIDS AND MICROWAVE RECEIVERS.
500 BARIUM COMPOUNDS; CRITICAL CURRENT DENSITY (SUPERCONDUCTIVITY);
500 HIGH-TEMPERATURE SUPERCONDUCTORS; JOSEPHSON EFFECT; SUPERCONDUCTING
500 THIN FILMS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; THIN FILMS; CRITICAL CURRENT
510 DENSITY; LITHOGRAPHY; JOSEPHSON JUNCTIONS; SQUIDS; MICROWAVE
510 RECEIVERS; 77 K; YBA/SUB 2/CU/SUB 3/O/SUB X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 7.7 E+01 K.
DOCUMENT= 1212
AUTH = ALFEEV
DT = 02
KN = B40891206648
LG = ENGL
SN = ISSN 0320-0108
YR = 88
000 3379613
002 B40891206648
010 JOURNAL PAPER; EXPERIMENTAL.
100 DETECTION OF THERMAL RADIATIONS BY BOLOMETRIC ELEMENTS USING THIN
100 FILMS OF Y-BA-CU-O HIGH-TEMPERATURE SUPERCONDUCTORS ON SRTIO/SUB 3/
100 SUBSTRATES AT LIQUID-NITROGEN TEMPERATURES.
200 ALFEEV, V.N.; ALEKSANDROV, A.S.; GLUKHOV, N.S.; GALKIN, S.G.; IVANOV,
200 A.A.; KULAKOV, A.V.; LICHAGIN, YU.V.; MALYUK, A.A.; PISKUNOV, V.B.;
200 PROTASOV, E.A.; KHRYAPOV, V.T.; YURKOV, A.N.
220 ENG.-PHYS. INST., MOSCOW, USSR
310 PIS'MA ZH. TEKH. FIZ. (USSR)
330 JULY 1988. VOL.14, NO.13-14, P.1268-71, REF.5
331 ENGLISH TRANSLATION: SOV. TECH. PHYS. LETT. (USA). JULY 1988. VOL.14,
331 NO.7, P.554-5. CODEN STPLD2. ISSN 0360-120X
350 ISSN 0320-0108, CODEN PZTFDD
400 IT HAS BEEN SHOWN EXPERIMENTALLY FOR THE FIRST TIME THAT
400 HIGH-TEMPERATURE THIN FILMS OF Y-BA-CU-O ON SRTIO/SUB 3/ SUBSTRATES
400 CAN BE USED TO FABRICATE INTEGRATED FILM BOLOMETRIC DETECTORS FOR
400 OPERATION AT LIQUID-NITROGEN TEMPERATURES.
500 BARIUM COMPOUNDS; BOLOMETERS; ELECTRIC SENSING DEVICES;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING THIN FILMS; THERMAL
500 VARIABLES MEASUREMENT; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; THERMAL RADIATIONS; BOLOMETRIC
510 ELEMENTS; THIN FILMS; BOLOMETRIC DETECTORS; Y-BA-CU-O.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1213
AUTH = MASTEROV
DT = 02
KN = B40891206649
LG = ENGL
SN = ISSN 0320-0108
YR = 88
000 3379614
002 B40891206649
010 JOURNAL PAPER; EXPERIMENTAL.
100 QUANTUM PROPERTIES OF AN ELECTROMAGNETIC EFFECT IN Y-BA-CU-O (1:2:3)
100 CERAMICS.
200 MASTEROV, V.F.; KOZYREV, S.V.; SHTEL'MAKH, K.F.; FEDOROV, A.V.
310 PIS'MA ZH. TEKH. FIZ. (USSR)
330 JULY 1988. VOL.14, NO.13-14, P.1277-80, REF.5
331 ENGLISH TRANSLATION: SOV. TECH. PHYS. LETT. (USA). JULY 1988. VOL.14,
331 NO.7, P.558-9. CODEN STPLD2. ISSN 0360-120X
350 ISSN 0320-0108, CODEN PZTFDD
400 THE AUTHORS REPORT A STUDY OF THE BEHAVIOR OF THE MICROWAVE
400 ABSORPTION (F APPROXIMATELY 9.5 GHZ) IN A WEAK MAGNETIC FIELD (THE
400 EARTH'S FIELD) AS A FUNCTION OF THE MICROWAVE POWER LEVEL AND THE
400 AMPLITUDE OF THE MODULATING MAGNETIC FIELD (F/SUB M/=100 KHZ) IN
400 CERAMIC SAMPLES OF Y-BA-CU-O (1:2:3).
500 BARIUM COMPOUNDS; CERAMICS; ELECTROMAGNETIC WAVE ABSORPTION;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; QUANTUM PROPERTIES; CERAMICS;
510 MICROWAVE ABSORPTION; 9.5 GHZ; Y-BA-CU-O.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
560 FREQUENCY 9.5 E+09 HZ.
DOCUMENT= 1214
AUTH = AL'TOV
DT = 02
KN = B40891206650
LG = ENGL
SN = ISSN 0320-0108
YR = 88
000 3379615
002 B40891206650
010 JOURNAL PAPER; THEORETICAL.
100 THERMAL INSTABILITY OF STABILIZED HIGH-T/SUB C/ SUPERCONDUCTORS.
200 AL'TOV, V.A.; AKHMETOV, A.A.; SYCHEV, V.V.
220 ALL-UNION SCI.-RES. INST. OF THE METROL. SERVICE, MOSCOW, USSR
310 PIS'MA ZH. TEKH. FIZ. (USSR)
330 JULY 1988. VOL.14, NO.13-14, P.1307-11, REF.10
331 ENGLISH TRANSLATION: SOV. TECH. PHYS. LETT. (USA). JULY 1988. VOL.14,
331 NO.7, P.570-2. CODEN STPLD2. ISSN 0360-120X
350 ISSN 0320-0108, CODEN PZTFDD
400 THE AUTHORS EXAMINE THE EVOLUTION OF A HEAT PULSE IN A SUPERCONDUCTOR
400 IN IDEAL THERMAL AND ELECTRICAL CONTACT WITH A NORMAL METAL AND
400 CARRYING A CURRENT. THEY HAVE CARRIED OUT A NUMERICAL SOLUTION OF THE
400 TIME DEPENDENT ONE DIMENSIONAL HEAT CONDUCTION EQUATION. THEY THEN
400 DETERMINE THE TEMPERATURE OF DESTRUCTION AND RESTORATION OF
400 SUPERCONDUCTIVITY.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES.
510 HIGH TEMPERATURE SUPERCONDUCTORS; THERMAL INSTABILITY; HEAT PULSE;
510 NUMERICAL SOLUTION; TIME DEPENDENT ONE DIMENSIONAL HEAT CONDUCTION.
DOCUMENT= 1215
AUTH = HATAFUKU
DT = 02
KN = B40891206831
LG = ENGL
SN = ISSN 0085-2325
YR = 88
000 3379796
002 B40891206831
010 JOURNAL PAPER; EXPERIMENTAL.
100 OBSERVATION ON PERSISTENT CURRENT IN THE HIGH T/SUB C/ SUPERCONDUCTOR
100 Y/SUB 1/BA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
200 HATAFUKU, H.; TAMURA, S.; ABE, K.; SAKANOUE, Y.; SASAKI, T.;
200 TAKAHASHI, S.
220 FAC. OF ENG., IWATE UNIV., MORIOKA, JAPAN
310 TECHNOL. REP. IWATE UNIV. (JAPAN)
330 1988. VOL.22, P.13-15, REF.1
350 ISSN 0085-2325, CODEN TIWUAT
400 PERSISTENT CURRENT WAS OBSERVED IN THE Y/SUB 1/BA/SUB 2/CU/SUB
400 3/O/SUB 7- DELTA / SUPERCONDUCTOR. NO DETERIORATION IN CURRENT WAS
400 OBSERVED FOR 50 DAYS WHEN THE SAMPLE HAD BEEN HELD AT THE LIQUID
400 NITROGEN TEMPERATURE.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; PERSISTENT CURRENT; 77 K; 50 D;
510 Y/SUB 1/BA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 Y1BA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS Y1/SS O/SS Y/SS.
560 TEMPERATURE 7.7 E+01 K; TIME 4.3 E+06 S.
DOCUMENT= 1216
AUTH = KOPRIO
DT = 06
KN = B40891206948
LG = ENGL
SN = ISSN 0042-207X
YR = 88
000 3379913
002 B40891206948
010 CONFERENCE PAPER; APPLICATIONS, EXPERIMENTAL.
100 QUADRUPOLE MASS SPECTROMETER MONITORED AND CONTROLLED THIN FILM
100 DEPOSITION PROCESSES UNDER ULTRAHIGH VACUUM CONDITIONS.
200 KOPRIO, J.A.; PETER, G.; FISCHER, H.
220 BALZERS AG, BALZERS, LIECHTENSTEIN
300 1ST EUROPEAN VACUUM CONFERENCE: EVC-1, VACUUM 88.
305 SALFORD, UK. 11-15 APRIL 1988. INT. UNION VACUUM SCI, TECH. ?
305 APPLICATIONS. BRITISH VACUUM COUNCIL.
310 VACUUM (UK)
330 1988. VOL.38, NO.8-10, P.783-6, REF.11
350 ISSN 0042-207X, CODEN VACUAV
400 APPLICATIONS FOR ULTRAHIGH VACUUM DEPOSITION PROCESSES ARE DISCUSSED
400 IN GENERAL TERMS. THE REQUIREMENTS FOR A RATE SENSOR MATCHING THESE
400 PROCESSES ARE LISTED AND THE ADVANTAGES OF THE QUADRUPOLE MASS
400 SPECTROMETER DISCUSSED. SPECIFIC EXAMPLES ILLUSTRATE SOME
400 CHARACTERISTICS OF QUADRUPOLE CONTROLLED EVAPORATION PROCESSES FOR
400 MATERIALS SUCH AS IN, NB, GE AND CU, USING SINGLE THERMAL OR ELECTRON
400 BEAM SOURCES AND SOME CO-DEPOSITION EXPERIMENTS WITH DIFFERENT
400 EVAPORATION SOURCE COMBINATIONS. APPLICATION OF THE CONCEPT OF
400 REACTIVE CO-EVAPORATION EXPERIMENTS OF THE HIGH TEMPERATURE
400 SUPERCONDUCTOR CONSTITUENTS Y, BA, CU AT AN O/SUB 2/ PRESSURE OF
400 5*10/SUP -5/ MBAR IS ILLUSTRATED.
500 COPPER; ELECTRON BEAM DEPOSITION; GERMANIUM; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; INDIUM; MASS SPECTROMETER APPLICATIONS; NIOBIUM;
500 SUPERCONDUCTING THIN FILMS; VACUUM CONTROL; VACUUM DEPOSITION.
510 CONTROLLED THIN FILM DEPOSITION; ULTRAHIGH VACUUM DEPOSITION
510 PROCESSES; RATE SENSOR; QUADRUPOLE MASS SPECTROMETER; QUADRUPOLE
510 CONTROLLED EVAPORATION PROCESSES; EVAPORATION SOURCE COMBINATIONS;
510 REACTIVE CO-EVAPORATION EXPERIMENTS; IN; NB; GE; CU; Y; BA; O/SUB 2/.
550 IN/EL; NB/EL; GE/EL; CU/EL; Y/EL; BA/EL; O2/EL O/EL.
DOCUMENT= 1217
AUTH = GUO-QIAN
DT = 06
KN = B40891206973
LG = ENGL
SN = ISSN 0042-207X
YR = 89
000 3379938
002 B40891206973
010 CONFERENCE PAPER; EXPERIMENTAL.
100 HYDROGEN IMPLANTATION OF THE HIGH T/SUB C/ SUPERCONDUCTOR YBA/SUB
100 2/CU/SUB 3/O/SUB 7/.
200 GUO-QIANG PANG; HANG-HE ZHANG; ZHENG YU; LIE OU; JIN-CAI HU;
200 GUANG-HOU WANG
220 DEPT. OF PHYS., NANJING UNIV., CHINA
300 ION BEAM INTERACTIONS WITH MATTER: INTERNATIONAL SYMPOSIUM ON
300 APPLICATIONS OF ION BEAMS PRODUCED BY SMALL ACCELERATORS.
305 JINAN, CHINA. 20-24 OCT. 1987. HIGH VOLTAGE ENG. EUROPA BV.
310 VACUUM (UK)
330 1989. VOL.39, NO.2-4, P.285-6, REF.2
350 ISSN 0042-207X, CODEN VACUAV
400 HIGH T/SUB C/ YBA/SUB 2/CU/SUB 3/O/SUB 7/ MATERIALS HAVE BEEN
400 IMPLANTED WITH 200 KEV PROTONS. THE RESULTS ARE: (1) THE T/SUB C/
400 INCREASED FROM 86.7 TO 89.8 K AND (2) THE DENSITY ALSO INCREASED, AS
400 SHOWN IN X-RAY DIFFRACTION AND SCANNING ELECTRON MICROSCOPE STUDIES.
500 BARIUM COMPOUNDS; DENSITY OF SOLIDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; HYDROGEN; ION IMPLANTATION; SCANNING ELECTRON
500 MICROSCOPE EXAMINATION OF MATERIALS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; X-RAY DIFFRACTION EXAMINATION OF MATERIALS; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; DENSITY; ION IMPLANTATION; PROTON
510 IMPLANTATION; CRITICAL TEMPERATURE; H IMPLANTATION; SEM; X-RAY
510 DIFFRACTION; 200 KEV; YBA/SUB 2/CU/SUB 3/O/SUB 7/:H.
550 YBA2CU3O7:H/SS YBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS H/SS O/SS
550 Y/SS H/EL H/DOP.
560 ELECTRON VOLT ENERGY 2.0 E+05 EV.
DOCUMENT= 1218
AUTH = LATHROP
DT = 06
KN = B40891207337
LG = ENGL
YR = 88
000 3380302
002 B40891207337
010 CONFERENCE PAPER; PRACTICAL, EXPERIMENTAL.
100 HIGH TRANSITION TEMPERATURE SUPERCONDUCTING THIN FILMS: IN-SITU
100 GROWTH, PROCESSING AND PROPERTIES.
200 LATHROP, D.K.; RUSSEK, S.E.; TANABE, K.; BUHRMAN, R.A.
220 SCH. OF APPL. ? ENG. PHYS., CORNELL UNIV., ITHACA, NY, USA
300 INTERNATIONAL ELECTRON DEVICES MEETING. TECHNICAL DIGEST (IEEE CAT.
300 NO.88CH2528-8).
305 SAN FRANCISCO, CA, USA. 11-14 DEC. 1988. IEEE.
310 USA
330 NEW YORK, NY, USA: IEEE, 1988. 902P., P.278-81, REF.3
400 A HIGH-PRESSURE REACTIVE EVAPORATION PROCESS AND A HIGH-PRESSURE
400 REACTIVE SPUTTERING PROCESS HAVE BEEN DEVELOPED FOR THE GROWTH OF
400 HIGH-QUALITY THIN FILMS OF YBA/SUB 2/CU/SUB 3/O/SUB 7/. BOTH
400 TECHNIQUES, WHEN USED WITH HEATED SUBSTRATES, ARE EFFECTIVE IN THE
400 FORMATION OF THE 123 PHASE IN SITU DURING THE FILM GROWTH. WITH
400 REACTIVE EVAPORATION ONLY A COOLDOWN ANNEAL IN A HIGHER PRESSURE
400 OXYGEN AMBIENT IS NECESSARY TO OBTAIN GOOD SUPERCONDUCTING
400 PROPERTIES. FOR THE REACTIVE SPUTTERING PROCESS, A BRIEF, POSTGROWTH,
400 RAPID THERMAL ANNEAL IS REQUIRED FOR BEST RESULTS. FULLY EPITAXIAL
400 GROWTH HAS BEEN ACHIEVED WITH SINGLE-CRYSTAL MGO SUBSTRATES. THE
400 RESULTANT FILMS, WHICH CAN BE QUITE SMOOTH AND UNIFORM, HAVE BEEN
400 PATTERNED TO MICRON AND SUBMICRON DIMENSIONS, AND THE TRANSPORT
400 PROPERTIES OF THESE MICROSTRUCTURES HAVE BEEN EXAMINED. RESULTS ARE
400 PRESENTED ON CRITICAL CURRENTS AND JOSEPHSON WEAK LINKS.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNESIUM COMPOUNDS; SPUTTER
500 DEPOSITION; SUPERCONDUCTING EPITAXIAL LAYERS; SUPERCONDUCTING THIN
500 FILMS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; PREPARATION; HTS; IN-SITU GROWTH;
510 PROCESSING; PROPERTIES; HIGH-PRESSURE REACTIVE EVAPORATION PROCESS;
510 HIGH-PRESSURE REACTIVE SPUTTERING PROCESS; HEATED SUBSTRATES; 123
510 PHASE; COOLDOWN ANNEAL; RAPID THERMAL ANNEAL; EPITAXIAL GROWTH;
510 MICROSTRUCTURES; CRITICAL CURRENTS; JOSEPHSON WEAK LINKS; YBA/SUB
510 2/CU/SUB 3/O/SUB 7/; YBA/SUB 2/CU/SUB 3/O/SUB 2/-MGO; SINGLE CRYSTAL
510 MGO SUBSTRATE.
550 YBA2CU3O2-MGO/INT YBA2CU3O2/INT BA2/INT CU3/INT MGO/INT BA/INT CU/INT
550 MG/INT O2/INT O/INT Y/INT YBA2CU3O2/SS BA2/SS CU3/SS BA/SS CU/SS
550 O2/SS O/SS Y/SS MGO/BIN MG/BIN O/BIN; MGO/SUR MG/SUR O/SUR MGO/BIN
550 MG/BIN O/BIN; YBA2CU3O7/SS BA2/SS BA/SS O7/SS U3/SS C/SS O/SS U/SS
550 Y/SS.
DOCUMENT= 1219
AUTH = YOSHIDA
DT = 06
KN = B40891207338
LG = ENGL
YR = 88
000 3380303
002 B40891207338
010 CONFERENCE PAPER; NEW DEVELOPMENT, PRACTICAL, EXPERIMENTAL.
100 MONOLITHIC DEVICE FABRICATION USING HIGH-T/SUB C/ SUPERCONDUCTOR.
200 YOSHIDA, A.; TAMURA, H.; HASUO, S.
220 FUJITSU LAB. LTD., ATSUGI, JAPAN
300 INTERNATIONAL ELECTRON DEVICES MEETING. TECHNICAL DIGEST (IEEE CAT.
300 NO.88CH2528-8).
305 SAN FRANCISCO, CA, USA. 11-14 DEC. 1988. IEEE.
310 USA
330 NEW YORK, NY, USA: IEEE, 1988. 902P., P.282-5, REF.8
400 A SELECTIVE PLASMA OXIDATION TECHNIQUE WAS DEVELOPED TO FABRICATE
400 MONOLITHIC HIGH-T/SUB C/ SUPERCONDUCTING DEVICES. THE TECHNIQUE
400 CONSISTED OF DEOXYGENATION OF BA/SUB 2/YCU/SUB 3/O/SUB 7-X/ FILMS AND
400 SUBSEQUENT SELECTIVE FILM OXIDATION. PLANAR
400 SUPERCONDUCTOR-NORMAL-SUPERCONDUCTOR (SNS) DIODES WERE THEN
400 FABRICATED FROM HIGH-T/SUB C/ BA-Y-CU-O THIN FILMS. REGIONS SERVING
400 AS SUPERCONDUCTING ELECTRODES IN THE SNS DIODE WERE EMBEDDED IN THE
400 DEOXYGENATED FILM. THE PLANAR SNS DIODES EXHIBITED BCS
400 (BORDEN-COOPER-SCHRIEFFER)-LIKE GAP STRUCTURES IN THEIR
400 CONDUCTANCE-VOLTAGE CHARACTERISTICS BELOW 50 K.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; INTEGRATED
500 CIRCUIT TECHNOLOGY; OXIDATION; SUPERCONDUCTING JUNCTION DEVICES;
500 SUPERCONDUCTING THIN FILMS; YTTRIUM COMPOUNDS.
510 MONOLITHIC DEVICE FABRICATION; HIGH TEMPERATURE SUPERCONDUCTORS;
510 SUPERCONDUCTOR NORMAL-SUPERCONDUCTOR DIODES; BORDEN-COOPER-SCHRIEFFER
510 GAPS; HIGH-T/SUB C/ SUPERCONDUCTOR; SELECTIVE PLASMA OXIDATION
510 TECHNIQUE; DEOXYGENATION; SELECTIVE FILM OXIDATION; SUPERCONDUCTING
510 ELECTRODES; SNS DIODE; DEOXYGENATED FILM; CONDUCTANCE-VOLTAGE
510 CHARACTERISTICS; 10 TO 50 K; BA/SUB 2/YCU/SUB 3/O/SUB 7-X/ FILMS.
550 BA2YCU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 1.0 E+01 TO 5.0 E+01 K.
DOCUMENT= 1220
AUTH = REUDINK
DT = 06
KN = B40891207503
LG = ENGL
YR = 88
000 3380468
002 B40891207503
010 CONFERENCE PAPER; REVIEW.
100 IMPACT OF HIGH-TEMPERATURE SUPERCONDUCTORS IN AEROSPACE APPLICATIONS.
200 REUDINK, D.O.
220 BOEING ELECTRON. CO., SEATTLE, WA, USA
300 1988 IEEE AEROSPACE APPLICATIONS CONFERENCE DIGEST (IEEE CAT.
300 NO.88TH0200-6).
305 PARK CITY, UT, USA. 7-12 FEB. 1988. IEEE.
310 USA
330 NEW YORK, NY, USA: IEEE, 1988. 240P., P.15/1-6, REF.5
400 THE SUPERCONDUCTING PHENOMENON IS BRIEFLY EXPLAINED. THE HISTORICAL
400 BACKGROUND TO SUPERCONDUCTIVITY RESEARCH IS PRESENTED, AND THE
400 DISCOVERY OF HIGH-TEMPERATURE SUPERCONDUCTORS IS DESCRIBED. POSSIBLE
400 APPLICATION OF SUPERCONDUCTORS IN THE AEROSPACE FIELD IS DISCUSSED.
400 PROBLEMS CONNECTED WITH THE USE OF SUPERCONDUCTORS ARE BRIEFLY
400 DISCUSSED, WITH EMPHASIS ON FAILURES AT THE INTERCONNECT POINT.
500 AEROSPACE; HIGH-TEMPERATURE SUPERCONDUCTORS.
510 HIGH-TEMPERATURE SUPERCONDUCTORS; AEROSPACE APPLICATIONS.
DOCUMENT= 1221
AUTH = WEYAND
DT = 06
KN = B40891207869
LG = ENGL
YR = 88
000 3380834
002 B40891207869
010 CONFERENCE PAPER; NEW DEVELOPMENT, PRACTICAL, EXPERIMENTAL.
100 AN NMR MARGINAL OSCILLATOR FOR MEASURING MAGNETIC FIELDS BELOW 50 MT.
200 WEYAND, K.
220 PHYS.-TECH. BUNDESANSTALT, BRAUNSCHWEIG, WEST GERMANY
300 CPEM '88 DIGEST. 1988 CONFERENCE ON PRECISION ELECTROMAGNETIC
300 MEASUREMENTS.
305 TSUKUBA, JAPAN. 7-10 JUNE 1988. IEEE. URSI. NBS. AGENCY IND. SCI. ?
305 TECHNOL., MIN. INT. TRADE ? IND.. SCI. COUNCIL JAPAN. IUPAP. ET AL.
310 JAPAN
320 SUEMATSU, Y.
330 TOKYO, JAPAN: SOC. INSTRUM. ? CONTROL ENG, 1988. XXI+430P., P.65,
330 REF.6
400 IN ORDER TO MEASURE OR CONTROL MAGNETIC FIELDS IN THE FLUX DENSITY
400 RANGE FROM 50 MT DOWN TO 1 MT BY MEANS OF A
400 NUCLEAR-MAGNETIC-RESONANCE (NMR) TECHNIQUE, A NOVEL MARGINAL
400 OSCILLATOR HAS BEEN DEVELOPED. BY OBSERVING PROTON RESONANCE IN AN
400 AQUEOUS CUSO/SUB 4/ SOLUTION OF ABOUT 2-CM/SUP 3/ SAMPLE VOLUME, IT
400 WAS POSSIBLE TO OBTAIN A SIGNAL-TO-NOISE RATIO OF 50 DB IN A FIELD
400 WITH A FLUX DENSITY OF 15 MT, LEADING TO A RESOLUTION OF 5 MT.
500 COPPER COMPOUNDS; MAGNETIC FIELD MEASUREMENT; NUCLEAR MAGNETIC
500 RESONANCE SPECTROSCOPY; OSCILLATORS; PROTON MAGNETIC RESONANCE.
510 MAGNETIC FIELD MEASUREMENT; NMR MARGINAL OSCILLATOR;
510 NUCLEAR-MAGNETIC-RESONANCE; PROTON RESONANCE; SIGNAL-TO-NOISE RATIO;
510 CUSO/SUB 4/ SOLUTION.
550 CUSO4/SS SO4/SS CU/SS O4/SS O/SS S/SS.
DOCUMENT= 1222
AUTH = NAKANE
DT = 06
KN = B40891207978
LG = ENGL
YR = 88
000 3380943
002 B40891207978
010 CONFERENCE PAPER; PRACTICAL, EXPERIMENTAL.
100 A METHOD FOR SIMULTANEOUSLY MEASURING RESISTIVITY AND THE MEISSNER
100 EFFECT OF A SUPERCONDUCTOR USED WITH A SOLENOID COIL.
200 NAKANE, H.
220 SCI. UNIV. OF TOKYO, JAPAN
300 CPEM '88 DIGEST. 1988 CONFERENCE ON PRECISION ELECTROMAGNETIC
300 MEASUREMENTS.
305 TSUKUBA, JAPAN. 7-10 JUNE 1988. IEEE. URSI. NBS. AGENCY IND. SCI. ?
305 TECHNOL., MIN. INT. TRADE ? IND.. SCI. COUNCIL JAPAN. IUPAP. ET AL.
310 JAPAN
320 SUEMATSU, Y.
330 TOKYO, JAPAN: SOC. INSTRUM. ? CONTROL ENG, 1988. XXI+430P., P.371-2,
330 REF.2
400 A METHOD FOR MEASURING THE RELATIONS AMONG THE PERMEABILITY,
400 RESISTIVITY, AND RADIUS OF A CYLINDRICAL CONDUCTOR FROM THE
400 DISPARITIES IN REACTANCE AND RESISTANCE BETWEEN A CIRCULAR SOLENOID
400 COIL WITH A CYLINDRICAL CONDUCTOR AND A SIMILAR COIL WITHOUT THE
400 CONDUCTOR WAS TESTED. THE RESISTIVITY OF A COPPER SPECIMEN MEASURED
400 BY THIS METHOD CORRELATED WELL WITH VALUES MEASURED BY THE DC
400 FOUR-PROBE METHOD. AN EXPERIMENT WITH A HIGH-T/SUB C/ SUPERCONDUCTOR
400 INDICATES THAT THE RESISTIVITY AND PERMEABILITY OF THE CONDUCTOR CAN
400 BE MEASURED WITH REMARKABLE ACCURACY.
500 COPPER; DIAMETER MEASUREMENT; ELECTRICAL CONDUCTIVITY MEASUREMENT;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; MEISSNER EFFECT; SOLENOIDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; MEISSNER EFFECT; PERMEABILITY;
510 RESISTIVITY; RADIUS; CIRCULAR SOLENOID COIL; CYLINDRICAL CONDUCTOR;
510 HIGH-T/SUB C/ SUPERCONDUCTOR; CU.
550 CU/EL.
DOCUMENT= 1223
AUTH = TANAKA
DT = 02
KN = B40891300129
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381287
002 B40891300129
010 JOURNAL PAPER; EXPERIMENTAL.
100 PB-DOPED BI-SR-CA-CU-O THIN FILMS.
200 TANAKA, A.; MACHI, T.; KAMEHARA, N.; NIWA, K.
220 FUJITSU LABS. LTD., KANAGAWA, JAPAN
310 APPL. PHYS. LETT. (USA)
330 3 APRIL 1989. VOL.54, NO.14, P.1362-4, REF.8
350 ISSN 0003-6951, CODEN APPLAB
400 THE AUTHORS PREPARED PB-DOPED BI-SR-CA-CU-O THIN FILMS BY
400 RF-MAGNETRON SPUTTERING WITH MULTIPLE TARGETS. A BI/SUB 2/O/SUB 3/
400 TARGET COMPENSATED FOR LACK OF BI AND A PBO TARGET WAS USED TO DOPE
400 PB INTO FILMS IN SUFFICIENT QUANTITY. IN THIN FILMS, PB EVAPORATES
400 EASILY DURING SINTERING. THEY PREPARED HEAVILY PB-DOPED FILMS AND
400 THEY EXHIBITED ZERO RESISTANCE AT 94.5 K WITH SINTERING AS SHORT AS
400 10 MIN. AFTER 1 H OF SINTERING, MORE THAN HALF OF THE PB EVAPORATED
400 AND THE FILM SHOWED A SHARP TRANSITION TO ITS SUPERCONDUCTING STATE.
400 T/SUB CE/ WAS 106.5 K. PB DOPING PROMOTES HIGH T/SUB C/ PHASE
400 FORMATION; HOWEVER, THE HIGH T/SUB C/ PHASE DOES NOT ALWAYS HAVE TO
400 CONTAIN PB.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LEAD; SINTERING; SPUTTER DEPOSITION; SPUTTERED
500 COATINGS; STRONTIUM COMPOUNDS; SUPERCONDUCTING THIN FILMS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; THIN FILMS; RF-MAGNETRON
510 SPUTTERING; MULTIPLE TARGETS; SINTERING; HEAVILY PB-DOPED FILMS; ZERO
510 RESISTANCE; SHARP TRANSITION; HIGH T/SUB C/ PHASE FORMATION; 94.5 K;
510 106.5 K; BISRCACUO:PB.
550 BISRCACUO:PB/SS BISRCACUO/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS PB/EL
550 PB/DOP.
560 TEMPERATURE 9.45 E+01 K; TEMPERATURE 1.065 E+02 K.
DOCUMENT= 1224
AUTH = GARZON
DT = 02
KN = B40891300130
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381288
002 B40891300130
010 JOURNAL PAPER; EXPERIMENTAL.
100 CHARACTERIZATION OF Y-BA-CU-O SUPERCONDUCTING THIN FILMS PREPARED BY
100 COEVAPORATION OF Y, CU, AND BAF/SUB 2/.
200 GARZON, F.H.; BEERY, J.G.; BROWN, D.R.; SHERMAN, R.J.; RAISTRICK,
200 I.D.
220 LOS ALAMOS NAT. LAB., NM, USA
310 APPL. PHYS. LETT. (USA)
330 3 APRIL 1989. VOL.54, NO.14, P.1365-7, REF.12
350 ISSN 0003-6951, CODEN APPLAB
400 THE AUTHORS HAVE STUDIED THE EFFECT OF VARYING THE POSTDEPOSITION
400 ANNEAL CONDITIONS ON THE PROPERTIES OF THIN FILMS OF YBA/SUB 2/CU/SUB
400 3/O/SUB 7/ PREPARED BY COEVAPORATION FROM Y, CU, AND BAF/SUB 2/. THE
400 TEMPERATURE OF THIS PROCESSING STEP DETERMINES BOTH THE
400 MICROSTRUCTURE OF THE FILMS AND THE CONSTITUENT PHASES. AT LOW
400 TEMPERATURES, BAF/SUB 2/ IS INCOMPLETELY REACTED AND THE PREDOMINANT
400 SUPERCONDUCTING PHASE IS Y/SUB 2/BA/SUB 4/CU/SUB 8/O/SUB 20-X/. AT
400 HIGHER TEMPERATURES, THE EQUILIBRIUM DISTRIBUTION OF PHASES, WHICH
400 INCLUDES YBA/SUB 2/CU/SUB 3/O/SUB 7/, IS FORMED. AS THE TEMPERATURE
400 IS RAISED, THE TEXTURE OF THE FILMS ALSO CHANGES. THE THERMODYNAMICS
400 OF THE FORMATION REACTION AND OF THE REACTION BETWEEN YBA/SUB
400 2/CU/SUB 3/O/SUB 7/ AND VARIOUS SUBSTRATE MATERIALS IS DISCUSSED.
500 ANNEALING; BARIUM COMPOUNDS; CRYSTAL MICROSTRUCTURE; HEAT OF
500 FORMATION; HIGH-TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING THIN
500 FILMS; TEXTURE; VAPOUR DEPOSITED COATINGS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; TEMPERATURE DEPENDENCE;
510 SUPERCONDUCTING THIN FILMS; POSTDEPOSITION ANNEAL CONDITIONS;
510 COEVAPORATION; MICROSTRUCTURE; CONSTITUENT PHASES; EQUILIBRIUM
510 DISTRIBUTION; TEXTURE; THERMODYNAMICS; FORMATION REACTION; SUBSTRATE
510 MATERIALS; Y; CU; YBA/SUB 2/CU/SUB 3/O/SUB 7/; BAF/SUB 2/;
510 Y-CU-BAF/SUB 2/.
550 YCUBAF2/SS BA/SS CU/SS F2/SS F/SS Y/SS; Y/EL; CU/EL; YBA2CU3O7/SS
550 BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS; BAF2/BIN BA/BIN F2/BIN
550 F/BIN.
DOCUMENT= 1225
AUTH = MIURA
DT = 02
KN = B40891300131
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381289
002 B40891300131
010 JOURNAL PAPER; EXPERIMENTAL.
100 AS-GROWN CRYSTALLIZED THIN FILM OF BI-SR-CA-CU-O AND ITS
100 LOW-TEMPERATURE ANNEALING EFFECT.
200 MIURA, S.; NAKAI, A.; SHIMAKAWA, Y.; YOSHITAKE, T.; MIYASAKA, Y.;
200 SHOHATA, N. / SATOH, T.
220 FUNDAMENTAL RES. LABS., NEC CORP., KAWASAKI, JAPAN
310 APPL. PHYS. LETT. (USA)
330 10 APRIL 1989. VOL.54, NO.15, P.1474-6, REF.10
350 ISSN 0003-6951, CODEN APPLAB
400 THE AS-GROWN CRYSTALLIZED FILMS OF LOW T/SUB C/ PHASE (T/SUB C/
400 APPROXIMATELY 80 K) IN A BI-SR-CA-CU-O SYSTEM WERE PREPARED BY RF
400 MAGNETRON SPUTTERING AND WERE ANNEALED IN ARGON OR OXYGEN ATMOSPHERE
400 BELOW 500 DEGREES C. SUPERCONDUCTING PROPERTIES AND THE C-AXIS
400 LATTICE CONSTANT VARIED ACCORDING TO THE ANNEALING TEMPERATURE AND
400 ATMOSPHERE. THESE RESULTS SUGGEST THAT THE OXYGEN CONTENT IN THE FILM
400 IS VARIED BY LOW-TEMPERATURE ANNEALING AND THAT THE VARIATION OF
400 OXYGEN CONTENT AFFECTS THE SUPERCONDUCTING AND STRUCTURAL PROPERTIES.
400 BY COOLING THE SAMPLE IN THE CHAMBER IN 760 TORR OXYGEN, THE AS-GROWN
400 FILM WITH T/SUB C/ END AT 74 K WAS OBTAINED.
500 ANNEALING; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LATTICE CONSTANTS; SPUTTERED COATINGS;
500 STOICHIOMETRY; STRONTIUM COMPOUNDS; SUPERCONDUCTING THIN FILMS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; O CONTENT DEPENDENCE; THIN FILM;
510 LOW-TEMPERATURE ANNEALING EFFECT; AS-GROWN CRYSTALLIZED FILMS; LOW
510 T/SUB C/ PHASE; RF MAGNETRON SPUTTERING; C-AXIS LATTICE CONSTANT;
510 ANNEALING TEMPERATURE; STRUCTURAL PROPERTIES; 80 K; 74 K; 500 DEGC;
510 BI-SR-CA-CU-O; O/SUB 2/ ATMOSPHERE; AR ATMOSPHERE.
550 O2/EL O/EL; AR/EL; BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
560 TEMPERATURE 8.0 E+01 K; TEMPERATURE 7.4 E+01 K; TEMPERATURE 7.73 E+02
560 K.
DOCUMENT= 1226
AUTH = MORELAND
DT = 02
KN = B40891300132
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381290
002 B40891300132
010 JOURNAL PAPER; EXPERIMENTAL.
100 EVIDENCE FOR THE SUPERCONDUCTING PROXIMITY EFFECT IN JUNCTIONS
100 BETWEEN THE SURFACES OF YBA/SUB 2/CU/SUB 3/O/SUB X/ THIN FILMS.
200 MORELAND, J.; ONO, R.H.; BEALL, J.A.; MADDEN, M. / NELSON, A.J.
220 NAT. INST. OF STAND. ? TECHNOL., BOULDER, CO, USA
310 APPL. PHYS. LETT. (USA)
330 10 APRIL 1989. VOL.54, NO.15, P.1477-9, REF.12
350 ISSN 0003-6951, CODEN APPLAB
400 THE AUTHORS HAVE USED THE SQUEEZABLE ELECTRON TUNNELING JUNCTION
400 TECHNIQUE FOR TESTING THE ELECTRICAL PROPERTIES OF THE SURFACES OF
400 YBA/SUB 2/CU/SUB 3/O/SUB X/ (YBCO) THIN-FILM ELECTRODES. AS DEPOSITED
400 AND ANNEALED, THE SURFACES OF THE ELECTRODES WERE INSULATING AT 4 K.
400 SEVERAL METHODS WERE USED TO IMPROVE THE ELECTRICAL PROPERTIES OF THE
400 ELECTRODES' SURFACES INCLUDING RAPID THERMAL ANNEALING, OXYGEN
400 SPUTTER ETCHING, AND THIN AG COATING TREATMENTS. THE GREATEST
400 IMPROVEMENT OCCURRED AFTER A DEPOSITION OF A 5 NM AG COATING AND
400 SUBSEQUENT RAPID THERMAL ANNEAL OF ONE SET OF YBCO FILMS. UNDER THESE
400 CONDITIONS IT WAS POSSIBLE TO MAKE A SUPERCONDUCTING JOSEPHSON POINT
400 CONTACT BETWEEN THE SURFACES OF THE ELECTRODES. THEY THINK THAT THE
400 AG ACTS AS A NORMAL-METAL PROXIMITY LAYER EFFECTIVELY SHUNTING THE
400 DEGRADED ELECTRODES' SURFACES.
500 ANNEALING; BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 PROXIMITY EFFECT; SILVER; SPUTTER ETCHING; SUPERCONDUCTING THIN
500 FILMS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; SUPERCONDUCTING PROXIMITY EFFECT;
510 SQUEEZABLE ELECTRON TUNNELING JUNCTION TECHNIQUE; ELECTRICAL
510 PROPERTIES; THIN-FILM ELECTRODES; RAPID THERMAL ANNEALING; SPUTTER
510 ETCHING; SUPERCONDUCTING JOSEPHSON POINT CONTACT; YBA/SUB 2/CU/SUB
510 3/O/SUB X/ THIN FILMS; THIN AG COATING TREATMENTS; YBACUO-AG.
550 YBACUO-AG/INT YBACUO/INT AG/INT BA/INT CU/INT O/INT Y/INT YBACUO/SS
550 BA/SS CU/SS O/SS Y/SS AG/EL; YBA2CU3O/SUR BA2/SUR CU3/SUR BA/SUR
550 CU/SUR O/SUR Y/SUR YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS;
550 AG/EL.
DOCUMENT= 1227
AUTH = WANG
DT = 02
KN = B40891300133
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381291
002 B40891300133
010 JOURNAL PAPER; EXPERIMENTAL.
100 ORIENTED THIN FILMS OF YBACU(F)O WITH HIGH T/SUB C/ AND J/SUB C/
100 PREPARED BY ELECTRON BEAM MULTILAYER EVAPORATION.
200 WANG, X.K.; SHENG, K.C.; LEE, S.J.; SHEN, Y.H.; SONG, S.N.; LI, D.X.;
200 CHANG, R.P.H.; KETTERSON, J.B.
220 MATER. RES. CENTER, NORTHWESTERN UNIV., EVANSTON, IL, USA
310 APPL. PHYS. LETT. (USA)
330 17 APRIL 1989. VOL.54, NO.16, P.1573-5, REF.15
350 ISSN 0003-6951, CODEN APPLAB
400 THIN FILMS OF YBACU(F)O WERE DEPOSITED ON SRTIO/SUB 3/(100)
400 SUBSTRATES BY MULTILAYER DEPOSITION FROM THREE ELECTRON GUNS
400 CONTAINING Y, BAF/SUB 2/, AND CU UNDER A PRESSURE OF 5*10/SUP -5/
400 TORR OF O/SUB 2/. THE FILMS WERE LATER ANNEALED IN A SEPARATE CHAMBER
400 UNDER A FLOWING O/SUB 2/-H/SUB 2/O ATMOSPHERE. X-RAY DIFFRACTION
400 STUDIES REVEAL THAT THE RESULTING STRUCTURE IS HIGHLY ORIENTED WITH
400 THE A AXIS PERPENDICULAR TO THE SUBSTRATE. SCANNING ELECTRON
400 MICROGRAPHS SHOW A MORPHOLOGY CONSISTING OF AN ARRAY OF ORTHOGONAL,
400 INTERCONNECTING BARS WITH WELL-DEVELOPED JUNCTIONS. HIGH-RESOLUTION
400 ELECTRON MICROSCOPY AND ELECTRON DIFFRACTION PATTERNS SHOW THAT THESE
400 JUNCTIONS ARE ATOMICALLY ABRUPT AND THAT THE ASSOCIATED C AXES ARE
400 MUTUALLY PERPENDICULAR. THESE EPITAXIAL FILMS SHOW A SHARP RESISTIVE
400 TRANSITION WITH T/SUB C/(R=0) AS HIGH AS 90 K. THE ZERO FIELD
400 CRITICAL CURRENT DENSITY, DETERMINED FROM MAGNETIZATION MEASUREMENTS,
400 IS 2.9*10/SUP 6/ A/CM/SUP 2/ AT 4.2 K AND 5.0*10/SUP 4/ A/CM/SUP 2/
400 AT 77 K.
500 BARIUM COMPOUNDS; CRITICAL CURRENT DENSITY (SUPERCONDUCTIVITY);
500 ELECTRON BEAM DEPOSITION; ELECTRON DIFFRACTION EXAMINATION OF
500 MATERIALS; ELECTRON MICROSCOPE EXAMINATION OF MATERIALS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETISATION; SCANNING ELECTRON
500 MICROSCOPE EXAMINATION OF MATERIALS; SUPERCONDUCTING EPITAXIAL
500 LAYERS; SUPERCONDUCTING TRANSITION TEMPERATURE; X-RAY DIFFRACTION
500 EXAMINATION OF MATERIALS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ORIENTED THIN FILMS; SEM; ANNEALING;
510 ELECTRON BEAM MULTILAYER EVAPORATION; SRTIO/SUB 3/(100) SUBSTRATES;
510 X-RAY DIFFRACTION; MORPHOLOGY; ELECTRON MICROSCOPY; ELECTRON
510 DIFFRACTION; EPITAXIAL FILMS; SHARP RESISTIVE TRANSITION; ZERO FIELD
510 CRITICAL CURRENT DENSITY; MAGNETIZATION; 90 K; 77 K; 4.2 K;
510 YBACU(F)O; SRTIO/SUB 3/.
550 SRTIO3/SUR TIO3/SUR O3/SUR SR/SUR TI/SUR O/SUR SRTIO3/SS TIO3/SS
550 O3/SS SR/SS TI/SS O/SS; YBACUFO/SS BA/SS CU/SS F/SS O/SS Y/SS.
560 TEMPERATURE 9.0 E+01 K; TEMPERATURE 7.7 E+01 K; TEMPERATURE 4.2 E+00
560 K.
DOCUMENT= 1228
AUTH = ESCUDERO
DT = 02
KN = B40891300134
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381292
002 B40891300134
010 JOURNAL PAPER; EXPERIMENTAL.
100 ISOLATION OF THE 110 K SUPERCONDUCTING PHASE OF BI-PB-SR-CA-CU-O
100 COMPOUNDS.
200 ESCUDERO, R.; CHAVIRA, E.; RIOS-JARA, D.
220 INST. DE INVESTIGACIONES EN MATER., UNIV. NACIONAL AUTONOMA DE
220 MEXICO, MEXICO CITY, MEXICO
310 APPL. PHYS. LETT. (USA)
330 17 APRIL 1989. VOL.54, NO.16, P.1576-8, REF.20
350 ISSN 0003-6951, CODEN APPLAB
400 THE AUTHORS HAVE PREPARED 90% SINGLE-PHASE BULK SAMPLES OF THE 110 K
400 SUPERCONDUCTING PHASE OF THE BISR-CA-CU-O COMPOUNDS WITH DIFFERENT PB
400 AMOUNTS. CRITICAL SUPERCONDUCTING TEMPERATURES (ZERO RESISTANCE) OF
400 UP TO 109 K WERE MEASURED IN THE BULK SAMPLES. X-RAY POWDER
400 DIFFRACTION PATTERNS OF THE ALMOST ISOLATED 110 K PHASE ARE
400 PRESENTED. COMPUTER-SIMULATED DIFFRACTOGRAMS WERE OBTAINED, WHICH ARE
400 IN GENERAL AGREEMENT WITH THE MEASURED ONES. A DISCUSSION OF THE ROLE
400 OF PB IN THE STABILITY OF THE 110 K PHASE IN THIS COMPOUND IS
400 PRESENTED.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LEAD COMPOUNDS; STRONTIUM COMPOUNDS; SUPERCONDUCTING
500 TRANSITION TEMPERATURE; X-RAY DIFFRACTION EXAMINATION OF MATERIALS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CRITICAL SUPERCONDUCTING
510 TEMPERATURES; COMPUTER SIMULATED DIFFRACTOGRAMS; X-RAY POWDER
510 DIFFRACTION PATTERNS; STABILITY; 110 K; BI-PB-SR-CA-CU-O.
550 BIPBSRCACUO/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS.
560 TEMPERATURE 1.1 E+02 K.
DOCUMENT= 1229
AUTH = CHEN
DT = 02
KN = B40891300135
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381293
002 B40891300135
010 JOURNAL PAPER; EXPERIMENTAL.
100 SUPERLATTICE MODULATION AND EPITAXY OF TL/SUB 2/BA/SUB 2/CA/SUB
100 2/CU/SUB 3/O/SUB 10/ THIN FILMS GROWN ON MGO AND SRTIO/SUB 3/
100 SUBSTRATES.
200 CHEN, C.H.; HONG, M.; WERDER, D.J.; KWO, J.; LIOU, S.H.; BACON, D.D.
220 AT?T BELL LABS., MURRAY HILL, NJ, USA
310 APPL. PHYS. LETT. (USA)
330 17 APRIL 1989. VOL.54, NO.16, P.1579-81, REF.13
350 ISSN 0003-6951, CODEN APPLAB
400 THE AUTHORS COMPARE THE SUPERLATTICE MODULATION, MICROSTRUCTURE, AND
400 EPITAXY OF TL/SUB 2/BA/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB 10/ THIN FILMS
400 GROWN ON MGO (100) AND SRTIO/SUB 3/ (100) SUBSTRATES BY DC DIODE
400 SPUTTERING. FILMS GROWN ON MGO WERE FOUND TO BE QUITE CLEAN WITH THE
400 C AXIS PERPENDICULAR TO THE SUBSTRATE. HOWEVER, NO IN-PLANE
400 ORIENTATIONAL RELATIONSHIP TO THE SUBSTRATE WAS FOUND. FILMS GROWN ON
400 SRTIO/SUB 3/, ON THE OTHER HAND, SHOWED VERY GOOD EPITAXY TO THE
400 SUBSTRATE DESPITE THE PRESENCE OF SECOND PHASES. FILMS GROWN ON MGO
400 ALSO EXHIBITED A LONGER COHERENCE LENGTH OF THE SUPERLATTICE
400 MODULATION THAN THOSE GROWN ON SRTIO/SUB 3/ UNDER IDENTICAL
400 CONDITIONS.
500 BARIUM COMPOUNDS; CALCIUM COMPOUNDS; CRYSTAL MICROSTRUCTURE;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SPUTTERED COATINGS; SUPERCONDUCTING
500 EPITAXIAL LAYERS; SUPERLATTICES; THALLIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; THIN FILMS; SUPERLATTICE MODULATION;
510 MICROSTRUCTURE; EPITAXY; DC DIODE SPUTTERING; ORIENTATIONAL
510 RELATIONSHIP; COHERENCE LENGTH; TL/SUB 2/BA/SUB 2/CA/SUB 2/CU/SUB
510 3/O/SUB 10/; SRTIO/SUB 3/ SUBSTRATES; MGO SUBSTRATES.
550 MGO/SUR MG/SUR O/SUR MGO/BIN MG/BIN O/BIN; TL2BA2CA2CU3O10/SS BA2/SS
550 CA2/SS CU3/SS O10/SS TL2/SS BA/SS CA/SS CU/SS TL/SS O/SS; SRTIO3/SUR
550 TIO3/SUR O3/SUR SR/SUR TI/SUR O/SUR SRTIO3/SS TIO3/SS O3/SS SR/SS
550 TI/SS O/SS.
DOCUMENT= 1230
AUTH = MIMURA
DT = 02
KN = B40891300136
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381294
002 B40891300136
010 JOURNAL PAPER; EXPERIMENTAL.
100 IMPROVEMENT OF THE CRITICAL CURRENT DENSITY IN THE SILVER SHEATHED
100 BI-PB-SR-CA-CU-O SUPERCONDUCTING TAPE.
200 MIMURA, M.; KUMAKURA, H.; TOGANO, K.; MAEDA, H.
220 NAT. RES. INST. FOR METALS, IBARAKI, JAPAN
310 APPL. PHYS. LETT. (USA)
330 17 APRIL 1989. VOL.54, NO.16, P.1582-4, REF.15
350 ISSN 0003-6951, CODEN APPLAB
400 THE CRITICAL CURRENT DENSITY (J/SUB C/) AT 77 K AND IN 0 T OF MORE
400 THAN 3000 A/CM/SUP 2/ HAS BEEN OBTAINED IN THE SILVER SHEATHED
400 BI-PB-SR-CA-CU-O TAPE FABRICATED BY THE COMBINATION PROCESS OF
400 SINTERING AND INTERMEDIATE COLD WORKING. THE DECREASE OF THE J/SUB C/
400 WITH INCREASING MAGNETIC FIELD IS MUCH SMALLER IN THE TAPE PREPARED
400 BY THIS PROCESS THAN THAT PREPARED BY SINTERING ONLY. THE IMPROVEMENT
400 OF THE J/SUB C/ IS ATTRIBUTED TO THE IMPROVEMENT OF THE COUPLING
400 BETWEEN THE GRAINS OF THE HIGH T/SUB C/ PHASE. THE PROCESS ENHANCES
400 THE FORMATION OF THE HIGH T/SUB C/ PHASE AND PRODUCES A HIGHLY
400 ORIENTED GRAIN STRUCTURE. THESE ARE CONSIDERED TO BE RESPONSIBLE FOR
400 THE LARGE IMPROVEMENT OF THE COUPLING.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CRITICAL CURRENT DENSITY
500 (SUPERCONDUCTIVITY); HIGH-TEMPERATURE SUPERCONDUCTORS; LEAD
500 COMPOUNDS; SILVER; STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; AG SHEATHED SUPERCONDUCTING TAPE;
510 CRITICAL CURRENT DENSITY; SINTERING; INTERMEDIATE COLD WORKING;
510 HIGHLY ORIENTED GRAIN STRUCTURE; 77 K; BIPBSRCACUO-AG.
550 BIPBSRCACUO-AG/INT BIPBSRCACUO/INT AG/INT BI/INT CA/INT CU/INT PB/INT
550 SR/INT O/INT BIPBSRCACUO/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS AG/EL.
560 TEMPERATURE 7.7 E+01 K.
DOCUMENT= 1231
AUTH = HINKS
DT = 02
KN = B40891300137
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381295
002 B40891300137
010 JOURNAL PAPER; EXPERIMENTAL.
100 SYNTHESIS OF HIGH-DENSITY BA/SUB 1-X/K/SUB X/BIO/SUB 3/
100 SUPERCONDUCTING SAMPLES.
200 HINKS, D.G.; MITCHELL, A.W.; ZHENG, Y.; RICHARDS, D.R.; DABROWSKI, B.
220 ARGONNE NAT. LAB., IL, USA
310 APPL. PHYS. LETT. (USA)
330 17 APRIL 1989. VOL.54, NO.16, P.1585-7, REF.7
350 ISSN 0003-6951, CODEN APPLAB
400 A SYNTHESIS PROCEDURE FOR PRODUCING HIGH-DENSITY BA/SUB 1-X/K/SUB
400 X/BIO/SUB 3/ HAS BEEN DEVELOPED. A NOVEL MELT-PROCESSING TECHNIQUE IS
400 DESCRIBED WHICH YIELDS STRONG, NEAR 100% DENSE SUPERCONDUCTING
400 MATERIAL. THIS MATERIAL IS MUCH MORE AMENABLE TO EXPERIMENTAL STUDY
400 THAN THE POWDER SAMPLES PRODUCED BY THE PREVIOUS SYNTHESIS METHODS.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; MATERIALS
500 PREPARATION; POTASSIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; HIGH-DENSITY; SYNTHESIS PROCEDURE;
510 MELT-PROCESSING TECHNIQUE; BA/SUB 1-X/K/SUB X/BIO/SUB 3/
510 SUPERCONDUCTING SAMPLES.
550 BAKBIO3/SS BA/SS BI/SS O3/SS K/SS O/SS.
DOCUMENT= 1232
AUTH = NONG
DT = 02
KN = B40891300138
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381296
002 B40891300138
010 JOURNAL PAPER; EXPERIMENTAL.
100 EFFECT OF ATMOSPHERE ON THE FORMATION OF LOW T/SUB C/ AND HIGH T/SUB
100 C/ PHASES IN BIPB-SR-CA-CU-O SUPERCONDUCTORS.
200 NONG M. HWANG; GUN W. BAHNG; HAN G. MOON; JONG C. PARK
220 KOREA STAND. RES. INST., CH'UNGNAM, SOUTH KOREA
310 APPL. PHYS. LETT. (USA)
330 17 APRIL 1989. VOL.54, NO.16, P.1588-90, REF.11
350 ISSN 0003-6951, CODEN APPLAB
400 TWO KINDS OF SINTERING ATMOSPHERE, N/SUB 2/ AND AIR, WERE USED TO
400 STUDY THE EFFECT OF ATMOSPHERE ON THE FORMATION OF THE LOW T/SUB C/
400 PHASE AND THE HIGH T/SUB C/ PHASE. THE ANNEALING TEMPERATURES WERE
400 810 DEGREES C IN N/SUB 2/ AND 850 DEGREES C IN AIR. THE RESISTIVITY
400 MEASUREMENTS AND THE X-RAY DIFFRACTION ANALYSIS SHOWED THAT WHILE THE
400 FRACTION OF THE HIGH T/SUB C/ PHASE CONTINUED TO INCREASE WITH
400 SINTERING TIMES IN AIR, IT DID NOT INCREASE IN ANY APPRECIABLE AMOUNT
400 EVEN AFTER 264 H OF SINTERING IN N/SUB 2/ ATMOSPHERE. COMPARED WITH
400 AIR, N/SUB 2/ ATMOSPHERE ENHANCED THE FORMATION OF THE LOW T/SUB C/
400 PHASE AND INHIBITED THE FORMATION OF THE HIGH T/SUB C/ PHASE.
500 ANNEALING; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CERAMICS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LEAD COMPOUNDS; SINTERING;
500 STRONTIUM COMPOUNDS; X-RAY DIFFRACTION EXAMINATION OF MATERIALS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; SINTERING ATMOSPHERE; LOW T/SUB C/
510 PHASE; HIGH T/SUB C/ PHASE; ANNEALING TEMPERATURES; RESISTIVITY
510 MEASUREMENTS; X-RAY DIFFRACTION ANALYSIS; 810 DEGC; 850 DEGC;
510 BIPB-SR-CA-CU-O SUPERCONDUCTORS.
550 BIPBSRCACUO/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS.
560 TEMPERATURE 1.08 E+03 K; TEMPERATURE 1.12 E+03 K.
DOCUMENT= 1233
AUTH = TALLON
DT = 02
KN = B40891300139
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3381297
002 B40891300139
010 JOURNAL PAPER; EXPERIMENTAL.
100 ENHANCING T/SUB C/ IN BI/SUB 2.1/CASR/SUB 2/CU/SUB 2/O/SUB 8+ DELTA /
100 FROM 90 TO 101 K BY YTTRIUM SUBSTITUTION.
200 TALLON, J.L.; BUCKLEY, R.G.; STAINES, M.P.; PRESLAND, M.R.; GILBERD,
200 P.W.
220 DEPT. OF SCI. ? IND. RES., LOWER HUTT, NEW ZEALAND
310 APPL. PHYS. LETT. (USA)
330 17 APRIL 1989. VOL.54, NO.16, P.1591-3, REF.7
350 ISSN 0003-6951, CODEN APPLAB
400 THE Y AND RARE-EARTH SUBSTITUTION FOR CA IN BI/SUB 2.1/CASR/SUB
400 2/CU/SUB 2/O/SUB 8+ DELTA / IS DESCRIBED WITH PARTICULAR EMPHASIS ON
400 Y SUBSTITUTION. THE AUTHORS HAVE PREPARED SINGLE PHASE, FULLY
400 SUBSTITUTED MATERIAL WHICH EXHIBITS AN 8.0*B-AXIS INCOMMENSURATE
400 STRUCTURE, RATHER LARGER THAN THE 4.75* STRUCTURE IN THE PARENT
400 SUPERCONDUCTOR. THE INFRARED ABSORPTION SPECTRA OF THE INSULATING
400 FULLY SUBSTITUTED MATERIAL ARE SHOWN TO HAVE FEATURES VERY SIMILAR TO
400 THAT FOR YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /. A SOLUBILITY RANGE IS
400 OBSERVED ONLY AT SUBSTITUTIONS UP TO 5% AT WHICH POINT
400 ZERO-RESISTANCE T/SUB C/ IS RAISED FROM 90 TO 101 K. THIS IS SHOWN TO
400 ARISE FROM 2 COPPER-LAYER MATERIAL AND NOT FROM 3 COPPER-LAYER
400 MATERIAL. COMBINED Y AND PB SUBSTITUTION YIELDS N=2 MATERIAL FOR
400 WHICH T/SUB C/ REMAINS FIXED AT 90 K, INSENSITIVE TO ANNEALING
400 TEMPERATURE AND OXYGEN LOADING.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; STRONTIUM COMPOUNDS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; SUPERCONDUCTING TRANSITION
510 TEMPERATURE; RARE-EARTH SUBSTITUTION; Y SUBSTITUTION; SINGLE PHASE;
510 INCOMMENSURATE STRUCTURE; INFRARED ABSORPTION SPECTRA; INSULATING
510 FULLY SUBSTITUTED MATERIAL; SOLUBILITY RANGE; ZERO-RESISTANCE;
510 ANNEALING TEMPERATURE; 90 TO 101 K; BI/SUB 2.1/CASR/SUB 2/CU/SUB
510 2/O/SUB 8+ DELTA /.
550 BI2.1CASR2CU2O/SS BI2.1/SS CU2/SS SR2/SS BI/SS CA/SS CU/SS SR/SS
550 O/SS.
560 TEMPERATURE 9.0 E+01 TO 1.01 E+02 K.
DOCUMENT= 1234
AUTH = LIU
DT = 02
KN = B40891300254
LG = CHIN
SN = ISSN 0372-736X
YR = 89
000 3381412
002 B40891300254
010 JOURNAL PAPER; THEORETICAL.
100 EFFECT OF ELECTRON-MANY PHONON INTERACTION ON SCATTERING TIME.
200 LIU FU-SUI / FAN XI-QING; LIU YAN-ZHANG; WANG HUAI-SHENG; RUAN
200 YING-CHAO
220 DEPT. OF PHYS., PEKING UNIV., CHINA
310 ACTA PHYS. SIN. (CHINA)
330 JAN. 1989. VOL.38, NO.1, P.154-8, REF.5. (IN CHINESE)
331 ENGLISH TRANSLATION: CHIN. J. PHYS. (USA). CODEN CHJPAR
350 ISSN 0372-736X, CODEN WLHPAR
400 A GENERAL APPROACH FOR ANALYSING THE EFFECT OF ELECTRON-MANY PHONON
400 INTERACTION ON ELECTRON LIFETIME AND THE CORRESPONDING EXPRESSIONS
400 ARE PRESENTED FOR THE CASE OF TEMPERATURE T>> DEBYE TEMPERATURE T/SUB
400 D/. IT IS POINTED OUT THAT THE ELECTRON-MANY PHONON INTERACTION MAY
400 BE IMPORTANT FOR 90 K SUPERCONDUCTIVITY IN Y/SUB 1/BA/SUB 2/CU/SUB
400 3/O/SUB 7- DELTA /.
500 BARIUM COMPOUNDS; CARRIER LIFETIME; ELECTRON RELAXATION TIME
500 (METALS); ELECTRON-PHONON INTERACTIONS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; ELECTRON-MANY PHONON INTERACTION;
510 SCATTERING TIME; ELECTRON LIFETIME; 90 K SUPERCONDUCTIVITY; 90 K;
510 Y/SUB 1/BA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 Y1BA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS Y1/SS O/SS Y/SS.
560 TEMPERATURE 9.0 E+01 K.
DOCUMENT= 1235
AUTH = LIANG
DT = 02
KN = B40891300257
LG = CHIN
SN = ISSN 0372-736X
YR = 89
000 3381415
002 B40891300257
010 JOURNAL PAPER; EXPERIMENTAL.
100 THE CRYSTAL STRUCTURES AND SUPERCONDUCTIVITY OF A NEW SERIES OF
100 SUPERCONDUCTING PHASES.
200 LIANG JING-KUI; ZHANG YU-LING; HUANG JIU-QI; XIE SI-SHEN; CHE
200 GUAN-CHAN; CHEN XIANG-RONG; NI YONG-MIN; ZHENG DONG-NING; JIA
200 SHUN-LIAN
220 INST. OF PHYS., ACAD. SINICA, BEIJING, CHINA
310 ACTA PHYS. SIN. (CHINA)
330 FEB. 1989. VOL.38, NO.2, P.264-72, REF.15. (IN CHINESE)
331 ENGLISH TRANSLATION: CHIN. J. PHYS. (USA). CODEN CHJPAR
350 ISSN 0372-736X, CODEN WLHPAR
400 THE AUTHORS SYNTHESIZED NEW SUPERCONDUCTING PHASES IN TLBA/SUB
400 2/CA/SUB N-1/CU/SUB N/O/SUB 2/O/SUB 2N+2.5/ BY SOLID STATE REACTION.
400 THE CRYSTAL STRUCTURES OF TLBA/SUB 2/CACU/SUB 2/O/SUB 6.5/ AND
400 TLBA/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB 8.5/ WERE DETERMINED BY MEANS OF
400 THE X-RAY POWDER DIFFRACTION METHOD. THE TWO COMPOUNDS BELONG TO THE
400 PRIMARY LATTICE WITH SPACE GROUP D/SUB 4H//SUP 1/-P4/MMM. THE LATTICE
400 CONSTANTS OF TLBA/SUB 2/CACU/SUB 2/O/SUB 6.5/ ARE A=3,847 AA, C=12.73
400 AA. THE LATTICE CONSTANTS OF TLBA/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB 8.5/
400 ARE A=3.847 AA, C=15.89 AA. EACH CELL CONTAINS ONE CHEMICAL FORMULA
400 UNIT. THE CATIONS ARE DISTRIBUTED ALTERNATELY AT POSITIONS OF (0,0,Z)
400 AND (1/2,1/2,Z) ALONG Z AXIS. TLBA/SUB 2/CACU/SUB 2/O/SUB 6.5/ SHOWS
400 ZERO RESISTANCE AT 101.4 K. TLBA/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB 8.5/
400 SHOWS ZERO RESISTANCE AT 112 K. THE OXYGEN DEFICIENT
400 PSEUDO-PEROVSKITE UNIT BA/SUB 2/CA/SUB N-1/CU/SUB N/O/SUB 2N+1/ IS
400 SEPARATED BY SINGLE TL-O LAYER IN THE CRYSTAL STRUCTURE OF TLBA/SUB
400 2/CA/SUB N-1/CU/SUB N/O/SUB 2N+2.5/, WHILE THE OXYGEN DEFICIENT
400 PSEUDO-PEROVSKITE UNIT BA/SUB 2/CA/SUB N-1/CU/SUB N/O/SUB 2N/ IS
400 SEPARATED BY A BILAYER OF TL-O IN THE CRYSTAL STRUCTURE OF TL/SUB
400 2/BA/SUB 2/CA/SUB N-1/CU/SUB N/O/SUB 2N+2/. AT THE SAME N VALUE,
400 T/SUB C/ OF TL/SUB 2/BA/SUB 2/CA/SUB N-1/CU/SUB N/O/SUB 2N+4/ IS
400 ABOUT 10 K HIGHER THAN T/SUB C/ OF TLBA/SUB 2/CA/SUB N-1/CU/SUB
400 N/O/SUB 2N+2.5/. THIS INDICATES THAT T/SUB C/ DEPENDS ON THE NUMBER
400 OF TL-O LAYERS AS WELL AS THE NUMBER OF (CUO/SUB 5/) AND (CUO/SUB 4/)
400 IN OXYGEN DEFICIENT PSEUDO-PEROVSKITE UNIT BA/SUB 2/CA/SUB N-1/CU/SUB
400 N/O/SUB 2N/.
500 BARIUM COMPOUNDS; CALCIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF
500 INORGANIC COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; LATTICE
500 CONSTANTS; SPACE GROUPS; STOICHIOMETRY; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; THALLIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; O DEFICIENCY; CATION
510 DISTRIBUTION; TRANSITION TEMPERATURE; CRYSTAL STRUCTURES;
510 SUPERCONDUCTING PHASES; SOLID STATE REACTION; TLBA/SUB 2/CACU/SUB
510 2/O/SUB 6.5/; TLBA/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB 8.5/; X-RAY POWDER
510 DIFFRACTION; SPACE GROUP D/SUB 4H//SUP 1/-P4/MMM; LATTICE CONSTANTS;
510 ZERO RESISTANCE; PSEUDO-PEROVSKITE UNIT; BILAYER; TL-O LAYERS; 101.4
510 K; 112 K; TLBA/SUB 2/CA/SUB N-1/CU/SUB N/O/SUB 2/O/SUB 2N+2.5/.
550 TLBA2CACUO2O/SS BA2/SS BA/SS CA/SS CU/SS O2/SS TL/SS O/SS.
560 TEMPERATURE 1.014 E+02 K; TEMPERATURE 1.12 E+02 K.
DOCUMENT= 1236
AUTH = FANG
DT = 02
KN = B40891300258
LG = CHIN
SN = ISSN 0372-736X
YR = 89
000 3381416
002 B40891300258
010 JOURNAL PAPER; EXPERIMENTAL.
100 STUDIES ON ANISOTROPY FOR SINGLE CRYSTAL GDBA/SUB 2/CU/SUB 3/O/SUB 7-
100 DELTA /.
200 FANG MING-HU; XIA JIAN-SHENG; XU ZHU-AN; ZHAO ZHAN-CHUN; ZHANG
200 QI-RUI; SUN DUN-MING; CHEN ZU-YAO; QIAN YI-TAI
220 DEPT. OF PHYS., UNIV. OF SCI. ? TECHNOL. OF CHINA, HEFEI, CHINA
310 ACTA PHYS. SIN. (CHINA)
330 FEB. 1989. VOL.38, NO.2, P.313-16, REF.13. (IN CHINESE)
331 ENGLISH TRANSLATION: CHIN. J. PHYS. (USA). CODEN CHJPAR
350 ISSN 0372-736X, CODEN WLHPAR
400 THE AUTHORS REPORT THE EXPERIMENTAL RESULTS OF ANISOTROPY OF THE
400 NORMAL STATE RESISTIVITY, TRANSITION TEMPERATURE AND MAGNETIC
400 TRANSITION IN SINGLE CRYSTAL GDBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
400 THEY FIND THAT BOTH RHO /SUB /// AND RHO /SUB PERPENDICULAR TO / ARE
400 FITTED VERY WELL TO THE ANDERSON-ZOU RELATIONSHIP RHO =A/T+BT, EXCEPT
400 NEAR T/SUB C/ WHERE FLUCTUATION ENHANCED CONDUCTANCE BECOMES
400 PROMINENT. THE STRIKING DIFFERENCE IN A, B OF TWO DIRECTIONS SUGGESTS
400 THAT CHARGE TRANSPORT PROCEEDS BY DIFFERENT MECHANISMS IN THE TWO
400 DIRECTIONS, THAT THE SYSTEM EXHIBITS REMARKABLE TWO-DIMENSIONAL
400 CHARACTER IN THE NORMAL STATE. THE SUPERCONDUCTIVITY IN THE C
400 DIRECTION IS WEAKER THAN THAT IN AB PLANE: T/SUB CE PERPENDICULAR TO
400 / IS 2 K LOWER THAN T/SUB CE///. THE AC MAGNETIC SHIELDING EFFECT
400 WHEN H//AB PLANE IS ONLY 76% OF THAT AS H PERPENDICULAR TO AB.
500 BARIUM COMPOUNDS; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE
500 SEMICONDUCTORS AND INSULATORS; GADOLINIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; MAGNETIC ANISOTROPY; MAGNETIC SHIELDING; MAGNETIC
500 TRANSITIONS; SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; ANISOTROPY; SINGLE CRYSTAL;
510 NORMAL STATE RESISTIVITY; TRANSITION TEMPERATURE; MAGNETIC
510 TRANSITION; ANDERSON-ZOU RELATIONSHIP; FLUCTUATION ENHANCED
510 CONDUCTANCE; CHARGE TRANSPORT; TWO-DIMENSIONAL CHARACTER; AC MAGNETIC
510 SHIELDING EFFECT; GDBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 GDBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS GD/SS O/SS.
DOCUMENT= 1237
AUTH = WEN
DT = 02
KN = B40891300280
LG = CHIN
SN = ISSN 0412-1961
YR = 88
000 3381438
002 B40891300280
010 JOURNAL PAPER; EXPERIMENTAL.
100 CHARACTERIZATION OF MICROSTRUCTURE OF PLASMA SPRAYED SUPERCONDUCTING
100 COATING.
200 WEN LISHI; QIAN SHENGWEI; HU QINGYU; GUAN KAN; ZHUANG YUZHI
220 INST. OF METAL RES., ACAD. SINICA, CHINA
310 ACTA METALL. SIN. (CHINA)
330 18 JUNE 1988. VOL.24, NO.3, P.B220-3, REF.9. (IN CHINESE)
350 ISSN 0412-1961, CODEN CHSPA4
400 A HIGH T/SUB C/ OXIDE YBACUO SUPERCONDUCTING COATING HAS BEEN
400 PREPARED BY PLASMA SPRAYING METHOD. THE STRUCTURE AND PHASE
400 TRANSFORMATION OF THE COATING DURING SPRAYING AND AFTER ANNEALING
400 TREATMENT PROCESS WERE STUDIED BY X-RAY DIFFRACTION, TEM, SEM AND DTA
400 TECHNIQUE. THE RESULTS SHOW THAT THE AS-SPRAYED COATING LOST ITS
400 SUPERCONDUCTIVITY COMPLETELY AT LIQUID NITROGEN TEMPERATURE AND WAS
400 COMPOSED MAINLY OF MICROCRYSTALLINE AND AMORPHOUS STRUCTURE. ITS
400 SUPERCONDUCTIVITY CAN BE RESTORED BY A PROPER ANNEALING AT 850-950
400 DEGREES C.
500 ANNEALING; BARIUM COMPOUNDS; CRYSTAL MICROSTRUCTURE; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; PLASMA ARC SPRAYED COATINGS; SCANNING ELECTRON
500 MICROSCOPE EXAMINATION OF MATERIALS; SUPERCONDUCTING THIN FILMS;
500 THERMAL ANALYSIS; TRANSMISSION ELECTRON MICROSCOPE EXAMINATION OF
500 MATERIALS; X-RAY DIFFRACTION EXAMINATION OF MATERIALS; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CHARACTERIZATION; MICROSTRUCTURE;
510 PLASMA SPRAYED SUPERCONDUCTING COATING; STRUCTURE; PHASE
510 TRANSFORMATION; ANNEALING; X-RAY DIFFRACTION; TEM; SEM; DTA;
510 MICROCRYSTALLINE; AMORPHOUS STRUCTURE; 850 TO 950 DEGC; YBACUO.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 1.12 E+03 TO 1.22 E+03 K.
DOCUMENT= 1238
AUTH = EPIOTIS
DT = 02
KN = B40891300360
LG = ENGL
SN = ISSN 0166-1280
YR = 89
000 3381518
002 B40891300360
010 JOURNAL PAPER; BIBLIOGRAPHY, THEORETICAL.
100 THE CONCEPT OF INTERSTITIAL BONDING.
200 EPIOTIS, N.D.
220 DEPT. OF CHEM., WASHINGTON UNIV., SEATTLE, WA, USA
310 THEOCHEM (NETHERLANDS)
330 JAN. 1989. VOL.52, P.45-101, REF.88
350 ISSN 0166-1280, CODEN THEODJ
400 MOLECULAR ORBITAL VALENCE BOND (MOVB) THEORY SUGGESTS THAT, IN
400 ADDITION TO THE WELL-KNOWN COVALENT AND IONIC MECHANISMS, THERE EXIST
400 TWO DISTINCT TYPES OF BONDING: OVERLAP DISPERSION AND IONIC OVERLAP
400 INDUCTION WHERE OVERLAP IS ASSISTED BY AN OVERLAP-INDEPENDENT COULOMB
400 BINDING MECHANISM. IONIC OVERLAP INDUCTION IS EXEMPLIFIED BY THE RLI
400 TETRAMER IN WHICH THE LI/SUB 4/ UNIT RELINQUISHES, E.G. ONE ELECTRON
400 TO THE R/SUB 4/ UNIT SETTING UP AN ELECTRIC FIELD WHICH GLUES THE
400 FOUR LI SPECIES IN LI/SUB 4//SUP +/ BY INTERSTITIALIZING THE
400 REMAINING THREE ELECTRONS. AS A RESULT, THREE R RADICALS CAN NOW MAKE
400 THREE INTERSTITIAL COVALENT BONDS WITH THE LI/SUB 4//SUP +/ FRAGMENT
400 WITH ONE R/SUP -/ BECOMING BOUND TO THE SAME FRAGMENT BY IONIC
400 FORCES. THE ANALYSIS IMPLIES THAT THERE EXISTS A WELL-DEFINED AND
400 SEPARATE BONDING MODE WHICH CAN EXIST ONLY WHEN ELECTROPOSITIVE
400 METALS ARE COMBINED WITH ELECTRONEGATIVE NONMETALS. ONE OF THE
400 ADDITIONALLY CITED ILLUSTRATIVE EXAMPLES IS A CUO DIMER OF BIOLOGICAL
400 SIGNIFICANCE. THIS SETS THE STAGE FOR THE EVENTUAL PRESENTATION OF A
400 THEORY OF HIGH TEMPERATURE SUPERCONDUCTIVITY BASED ON THESE IDEAS.
500 BONDS (CHEMICAL); MOLECULAR ORBITALS CALCULATIONS; ORGANOMETALLIC
500 COMPOUNDS; VB CALCULATIONS.
510 ALKYLLITHIUM TETRAMER; INTERSTITIAL BONDING; OVERLAP DISPERSION;
510 IONIC OVERLAP INDUCTION; OVERLAP-INDEPENDENT COULOMB BINDING
510 MECHANISM; ELECTRIC FIELD; INTERSTITIAL COVALENT BONDS; IONIC FORCES;
510 ELECTROPOSITIVE METALS; ELECTRONEGATIVE NONMETALS; HIGH TEMPERATURE
510 SUPERCONDUCTIVITY; CUO.
550 CUO/BIN CU/BIN O/BIN.
DOCUMENT= 1239
AUTH = ZANDBERG
DT = 02
KN = B40891300731
LG = ENGL
SN = ISSN 0721-7250
YR = 89
000 3381889
002 B40891300731
010 JOURNAL PAPER; EXPERIMENTAL.
100 HIGH-RESOLUTION ELECTRON MICROSCOPY AND ELECTRON DIFFRACTION ON
100 BI/SUB 2/SR/SUB 2-X/LA/SUB X/CA/SUB N/CU/SUB 1+N/O/SUB 6+2N+ DELTA /.
200 ZANDBERGEN, H.W.; GROEN, W.A.; VAN TENDELOO, G.; AMELINCKX, S.
220 GORLAEUS LAB., LEIDEN UNIV., NETHERLANDS
310 APPL. PHYS. A, SOLIDS SURF. (WEST GERMANY)
330 APRIL 1989. VOL.A48, NO.4, P.305-14, REF.30
350 ISSN 0721-7250, CODEN APSFDB
400 SOLID SOLUTIONS, BI/SUB 2/SR/SUB 2-X/LA/SUB X/CUO/SUB 6+ DELTA / WITH
400 X<1.3 AND BI/SUB 2/SR/SUB 2-X/LA/SUB X/CACU/SUB 2/O/SUB 8+ DELTA /
400 WITH PROBABLY X<1.3 ARE REPORTED. BOTH SOLID SOLUTIONS SHOW
400 CONSIDERABLE NONLINEAR CHANGES IN THE UNIT CELL DIMENSIONS AND A
400 CHANGE IN THE MODULATION VECTOR FROM 4.7B TO 3.5B FOR X=0 AND X=1.2,
400 RESPECTIVELY. IT IS SHOWN THAT BI/SUB 2/SR/SUB 2-X/LA/SUB X/CACU/SUB
400 2/O/SUB 8+ DELTA / SHOWS SOMETIMES THE ABSENCE OF THE 0.54 NM PERIOD
400 ALONG A, WHEREAS THE MODULATION REMAINS, SUGGESTING BOTH FEATURES NOT
400 TO BE CORRELATED. THE INVESTIGATION OF THE SOLID SOLUTION BI/SUB
400 2/SR/SUB 2-X/LA/SUB X/CACU/SUB 2/O/SUB 8+ DELTA / IS SEVERELY
400 HAMPERED BY THE PRESENCE OF THE N=0 STRUCTURE IN THE REACTION PRODUCT
400 WHEN ONE STARTS WITH STOICHIOMETRIC MIXTURE. THIS CAN BE OVERCOME BY
400 ADDING EXTRA CA AND HEATING DIRECTLY JUST BELOW THE MELTING POINT.
400 HOWEVER, ADDITION OF CA TO THE MIXTURE LEADS TO CHANGES IN THE SOLID
400 SOLUTION RANGE, BECAUSE CA CAN REPLACE SR.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; ELECTRON DIFFRACTION
500 EXAMINATION OF MATERIALS; ELECTRON MICROSCOPE EXAMINATION OF
500 MATERIALS; HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM COMPOUNDS;
500 LATTICE CONSTANTS; SOLID SOLUTIONS; STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; HIGH RESOLUTION ELECTRON
510 MICROSCOPY; HREM; ELECTRON DIFFRACTION; SOLID SOLUTIONS; NONLINEAR
510 CHANGES; UNIT CELL DIMENSIONS; MODULATION VECTOR; BI/SUB 2/SR/SUB
510 2-X/LA/SUB X/CA/SUB N/CU/SUB 1+N/O/SUB 6+2N+ DELTA /; BI/SUB 2/SR/SUB
510 2-X/LA/SUB X/CUO/SUB 6+ DELTA /.
550 BI2SRLACACUO/SS BI2/SS BI/SS CA/SS CU/SS LA/SS SR/SS O/SS;
550 BI2SRLACUO/SS BI2/SS BI/SS CU/SS LA/SS SR/SS O/SS.
DOCUMENT= 1240
AUTH = ITOH
DT = 02
KN = B40891300732
LG = ENGL
SN = ISSN 0721-7250
YR = 89
000 3381890
002 B40891300732
010 JOURNAL PAPER; EXPERIMENTAL.
100 THE TL-BA-CA-CU-O SUPERCONDUCTING CERAMICS CONTAINING AL/SUB 2/O/SUB
100 3/.
200 ITOH, T.; UCHIKAWA, H.
220 CERAMICS RES. LAB., ONODA CEMENT CO. LTD., TOKYO, JAPAN
310 APPL. PHYS. A, SOLIDS SURF. (WEST GERMANY)
330 APRIL 1989. VOL.A48, NO.4, P.321-3, REF.5
350 ISSN 0721-7250, CODEN APSFDB
400 THE TL-BA-CA-CU-O SUPERCONDUCTING CERAMICS CONTAINING AL/SUB 2/O/SUB
400 3/ HAVE BEEN PREPARED UTILIZING THE REACTION, TL/SUB 2/O/SUB
400 3/+BACUO/SUB 2/+CA/SUB 2/CUO/SUB 3/+AL/SUB 2/O/SUB 3/ OR TL/SUB
400 2/O/SUB 3/+BACUO/SUB 2/+CA/SUB 2/CUO/SUB 3/+ALCUO/SUB 2.5/. IT IS
400 SHOWN THAT THE RESULTING CERAMICS SHOW THE SUPERCONDUCTIVITY AT
400 TEMPERATURES OVER 100 K WHEN THE AL/CU MOLAR RATIO IS KEPT BELOW 0.5.
400 EPMA ANALYSES REVEALED THAT THERE IS ALWAYS AN AL/SUB 2/BAO/SUB 4/
400 LAYER BETWEEN THE SUPERCONDUCTING TL-BA-CA-CU-O AND AL/SUB 2/O/SUB 3/
400 PHASES, LEADING TO THE SEPARATION BETWEEN THE SUPERCONDUCTING AND
400 AL/SUB 2/O/SUB 3/ PHASES.
500 ALUMINA; BARIUM COMPOUNDS; CALCIUM COMPOUNDS; CERAMICS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; MATERIALS PREPARATION; THALLIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; MATERIALS PREPARATION;
510 SUPERCONDUCTING CERAMICS; AL/CU MOLAR RATIO; EPMA ANALYSES; 100 K;
510 TLBACACUO-AL/SUB 2/O/SUB 3/.
550 TLBACACUOAL2O3/SS AL2O3/SS AL2/SS AL/SS BA/SS CA/SS CU/SS O3/SS TL/SS
550 O/SS.
560 TEMPERATURE 1.0 E+02 K.
DOCUMENT= 1241
AUTH = LAKSHMIK
DT = 02
KN = B40891300733
LG = ENGL
SN = ISSN 0721-7250
YR = 89
000 3381891
002 B40891300733
010 JOURNAL PAPER; EXPERIMENTAL.
100 NATURE OF CONTACT RESISTANCE IN HIGH-T/SUB C/ YBA/SUB 2/CU/SUB
100 3/O/SUB 7- DELTA / SUPERCONDUCTORS.
200 LAKSHMIKUMAR, S.T.; RASTOGI, A.C.
220 NAT. PHYS. LAB. NEW DELHI, INDIA
310 APPL. PHYS. A, SOLIDS SURF. (WEST GERMANY)
330 APRIL 1989. VOL.A48, NO.4, P.325-9, REF.16
350 ISSN 0721-7250, CODEN APSFDB
400 THE CONTACTS BETWEEN VARIOUS METALS AND THE HIGH-T/SUB C/
400 SUPERCONDUCTOR YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / ARE CHARACTERIZED
400 BY CONTACT RESISTANCE, R/SUB C/, AND I-V MEASUREMENTS FROM 300 K TO
400 90 K. THE CONTACTS WITH BULK SUPERCONDUCTOR WERE MADE BY VACUUM
400 DEPOSITION. FOUR METALS, AU, AG, AL, AND BI, WERE INVESTIGATED. THE
400 CURRENT TRANSPORT ACROSS THE CONTACT IS BY CARRIER TUNNELING. ALL
400 CONTACTS WERE OHMIC AS THEIR I-V CHARACTERISTICS WERE SYMMETRICAL
400 WITH RESPECT TO CURRENT DIRECTION. R/SUB C/ VALUES RANGE BETWEEN
400 10/SUP -2/ TO 10/SUP 1/ OMEGA CM/SUP 2/ AND INCREASE LINEARLY AS THE
400 TEMPERATURE IS LOWERED. THE CONTACT RESISTANCE ORIGINATES FROM TWO
400 DISTINCT PHYSICAL PROCESSES. ONE IS THE MODIFICATION OF THE CARRIER
400 CONCENTRATION AT THE INTERFACE BY THE CONTACT METAL. THE SECOND IS
400 THE NATURE OF CARRIER INJECTION AT THE FREE SURFACE OF THE
400 SUPERCONDUCTOR. THE R/SUB C/ VALUES DEPEND ON THE CONTACT
400 METAL-OXYGEN INTERACTION PARAMETER SIGNIFYING THE NEED FOR OXYGEN
400 PASSIVATION FOR OBTAINING LOW CONTACT RESISTANCES.
500 ALUMINIUM; BARIUM COMPOUNDS; BISMUTH; CARRIER DENSITY; CONTACT
500 RESISTANCE; GOLD; HIGH-TEMPERATURE SUPERCONDUCTORS; OHMIC CONTACTS;
500 SILVER; SUPERCONDUCTIVE TUNNELLING; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; OHMIC CONTACTS; CONTACT
510 RESISTANCE; I-V MEASUREMENTS; CURRENT TRANSPORT; CARRIER TUNNELING;
510 CARRIER CONCENTRATION; CARRIER INJECTION; 90 TO 300 K; YBA/SUB
510 2/CU/SUB 3/O/SUB 7- DELTA /; AU; AG; AL; BI.
550 YBA2CU3O/INT BA2/INT CU3/INT BA/INT CU/INT O/INT Y/INT YBA2CU3O/SS
550 BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; AU/INT AU/EL; AG/INT AG/EL;
550 AL/INT AL/EL; BI/INT BI/EL.
560 TEMPERATURE 9.0 E+01 TO 3.0 E+02 K.
DOCUMENT= 1242
AUTH = CORBEL
DT = 02
KN = B40891300734
LG = ENGL
SN = ISSN 0721-7250
YR = 89
000 3381892
002 B40891300734
010 JOURNAL PAPER; EXPERIMENTAL.
100 POSITRON ANNIHILATION AT DEFECTS IN SINTERED HIGH-T/SUB C/ PEROVSKITE
100 SUPERCONDUCTORS.
200 CORBEL, C.; BERNEDE, P. / PASCARD, H.; RULLIER-ALBENQUE, F.; KORMAN,
200 R.; MARUCCO, J.F.
220 CENS, INST. NAT. DES SCI. ET TECH. NUCL., GIF-SUR-YVETTE, FRANCE
310 APPL. PHYS. A, SOLIDS SURF. (WEST GERMANY)
330 APRIL 1989. VOL.A48, NO.4, P.335-41, REF.24
350 ISSN 0721-7250, CODEN APSFDB
400 THE AUTHORS REPORT POSITRON LIFETIME MEASUREMENTS IN SINTERED
400 SUPERCONDUCTING YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ AND GDBA/SUB 2/CU/SUB
400 3/O/SUB 7-X/ OXIDES. IT IS SHOWN THAT THE THERMAL BEHAVIOUR OF THE
400 POSITRON LIFETIME SPECTRA STRONGLY DEPENDS ON THE PREPARATION OF THE
400 CERAMICS. A LIFETIME OF 190+OR-3 PS IS ATTRIBUTED TO OXYGEN DEFICIENT
400 REGIONS. TWO LIFETIMES OF 251+OR-7 PS AND 225+OR-5 PS ARE ATTRIBUTED
400 TO A CATION VACANCY PRESENTING A TEMPERATURE DEPENDENT ATOMIC
400 ARRANGEMENT. THE LIFETIME TRANSITION (251 TO 225 PS) OCCURS DURING
400 DECREASES IN TEMPERATURE ACROSS THE RESISTIVITY SUPERCONDUCTING
400 TRANSITION. THIS LIFETIME CHANGE INDICATES THAT THE VOLUME OF THE
400 CATION VACANCY DECREASES IN THE SUPERCONDUCTING STATE.
500 BARIUM COMPOUNDS; CERAMICS; GADOLINIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; POSITRON ANNIHILATION IN LIQUIDS AND SOLIDS;
500 VACANCIES (CRYSTAL); YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; POSITRON ANNIHILATION; DEFECTS;
510 SINTERED HIGH-T/SUB C/ PEROVSKITE SUPERCONDUCTORS; THERMAL BEHAVIOUR;
510 POSITRON LIFETIME SPECTRA; PREPARATION; CERAMICS; CATION VACANCY;
510 TEMPERATURE DEPENDENT ATOMIC ARRANGEMENT; LIFETIME TRANSITION;
510 RESISTIVITY SUPERCONDUCTING TRANSITION; YBA/SUB 2/CU/SUB 3/O/SUB
510 7-X/; GDBA/SUB 2/CU/SUB 3/O/SUB 7-X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; GDBA2CU3O/SS BA2/SS
550 CU3/SS BA/SS CU/SS GD/SS O/SS.
DOCUMENT= 1243
AUTH = PANG
DT = 02
KN = B40891300735
LG = ENGL
SN = ISSN 0721-7250
YR = 89
000 3381893
002 B40891300735
010 JOURNAL PAPER; EXPERIMENTAL.
100 EFFECT OF POLARIZABLE ATMOSPHERES ON SUPERCONDUCTIVITY OF THE
100 Y-BA-CU-O COMPOUNDS.
200 PANG, D. / YANG, Z.; CHEN, D.; QUAN, M.X.
220 INST. OF METAL RES., ACAD. SINICA, SHENYANG, CHINA
310 APPL. PHYS. A, SOLIDS SURF. (WEST GERMANY)
330 APRIL 1989. VOL.A48, NO.4, P.355-7, REF.11
350 ISSN 0721-7250, CODEN APSFDB
400 THIS LETTER REPORTS THAT THERE MAY EXIST AN INTENSE INTERACTION
400 BETWEEN THE Y-BA-CU-O SUPERCONDUCTORS AND POLARIZABLE MOLECULES,
400 WHICH RESULTS IN A CHANGE IN STRUCTURE AND AFFECTS THE
400 SUPERCONDUCTIVITY. THIS PHENOMENON CAN BE EXPLAINED IN TERMS OF THE
400 POLARIZATION AND RECOMBINATION OF ELECTRON ORBITS OF THE
400 COPPER-OXYGEN PLANE.
500 AGEING; BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC
500 COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; POLARISABILITY; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; AGING; ELECTRON ORBITS
510 RECOMBINATION; CU-O PLANE; ELECTRON ORBITS POLARISATION; POLARIZABLE
510 ATMOSPHERES; INTENSE INTERACTION; POLARIZABLE MOLECULES; STRUCTURE;
510 Y-BA-CU-O SUPERCONDUCTORS.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1244
AUTH = MARIOT
DT = 02
KN = B40891300737
LG = ENGL
SN = ISSN 0722-3277
YR = 89
000 3381895
002 B40891300737
010 JOURNAL PAPER; EXPERIMENTAL.
100 LOCAL ELECTRONIC STRUCTURE OF CU/SUB 2/O, CUO AND YBA/SUB 2/CU/SUB
100 3/O/SUB 7- DELTA /.
200 MARIOT, J.-M.; BARNOLE, V.; HAGUE, C.F. / VETTER, G.; QUEYROUX, F.
220 LAB. DE CHIMIE PHYS., UNIV. PIERRE ET MARIE CURIE, PARIS, FRANCE
310 Z. PHYS. B, CONDENS. MATTER (WEST GERMANY)
330 1989. VOL.75, NO.1, P.1-9, REF.41
350 ISSN 0722-3277, CODEN ZPCMDN
400 CU 3D AND O 2P ELECTRONIC STATES OF CU/SUB 2/O, CUO AND THE HIGH
400 T/SUB C/ COMPOUND YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / HAVE BEEN
400 PROBED BY MEANS OF HIGH RESOLUTION X-RAY EMISSION SPECTROSCOPY (XES).
400 THE CU L ALPHA AND O K ALPHA XES BANDS ARE COMPARED IN DETAIL WITH
400 RECENTLY REPORTED X-RAY PHOTOELECTRON AND ULTRAVIOLET PHOTOELECTRON
400 SPECTROSCOPY (XPS AND UPS) MEASUREMENTS AND DENSITIES OF STATES
400 OBTAINED BY LOCAL DENSITY FUNCTIONAL (LDF) THEORY. THE XES DATA SHOW
400 THAT THE HYBRIDIZATION BETWEEN CU 3D AND O 2P STATES IS COMPLETELY
400 MODIFIED IN CUO AND YBA/SUB 2/CU/SUB 3/O/SUB Y- DELTA /, WHERE D-D
400 CORRELATION ENERGY IS LARGE, AS COMPARED TO LDF PREDICTIONS. SUCH IS
400 NOT THE CASE FOR CU/SUB 2/O WHERE AGREEMENT BETWEEN THEORY AND
400 EXPERIMENT IS GOOD. THE CU 3D STATES ARE FOUND TO BE HIGHLY LOCALIZED
400 IN YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / (THOUGH LESS SO THAN IN CUO).
400 THE O 2P STATES LIE AT LOWER BINDING ENERGIES THAN IN THE SIMPLER
400 OXIDES AND ARE MAINLY SITUATED ABOVE THE CU 3D STATES. THE RESPECTIVE
400 POSITIONS OF THE CENTRE OF GRAVITY OF THE O K ALPHA EMISSION BANDS ON
400 AN X-RAY ENERGY SCALE INDICATE THAT THE OXYGEN SITES ARE LESS WELL
400 SCREENED BY THE O 2P STATES IN THE HIGH T/SUB C/ COMPOUND. THIS
400 PROVIDES INDIRECT EVIDENCE FOR THE PRESENCE OF D-LIKE STATES AT THE
400 OXYGEN SITES.
500 BARIUM COMPOUNDS; BINDING ENERGY; COPPER COMPOUNDS; ELECTRONIC
500 DENSITY OF STATES; HIGH-TEMPERATURE SUPERCONDUCTORS; X-RAY EMISSION
500 SPECTRA; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; LOCAL DENSITY FUNCTIONAL THEORY;
510 HIGH RESOLUTION X-RAY EMISSION SPECTROSCOPY; XES; XPS; UPS; DENSITIES
510 OF STATES; D-D CORRELATION ENERGY; BINDING ENERGIES; YBA/SUB 2/CU/SUB
510 3/O/SUB 7- DELTA /; CU/SUB 2/O; CUO.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; CU2O/BIN CU2/BIN
550 CU/BIN O/BIN; CUO/BIN CU/BIN O/BIN.
DOCUMENT= 1245
AUTH = SCHWARTZ
DT = 02
KN = B40891300748
LG = ENGL
SN = ISSN 0167-577X
YR = 89
000 3381906
002 B40891300748
010 JOURNAL PAPER; EXPERIMENTAL.
100 CONTROLLED ROOM-TEMPERATURE REDUCTION OF YBA/SUB 2/CU/SUB 3/O/SUB
100 7-X/; A SYNTHETIC ROUTE TO METASTABLE SUPERCONDUCTING PHASES.
200 SCHWARTZ, M. / RAPPAPORT, M.; HODES, G.; REICH, S.; CAHEN, D.
220 DEPT. OF STRUCTURAL CHEM., WEIZMANN INST. OF SCI., ROHOVOT, ISRAEL
310 MATER. LETT. (NETHERLANDS)
330 MARCH 1989. VOL.7, NO.12, P.411-14, REF.14
350 ISSN 0167-577X, CODEN MLETDJ
400 THE OXYGEN CONTENT OF YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ CAN BE REDUCED
400 ELECTROCHEMICALLY IN A NONAQUEOUS ELECTROLYTE AT ROOM TEMPERATURE.
400 THE PRODUCTS ARE CHARACTERIZED BY X-RAY POWDER DIFFRACTION, MAGNETIC
400 SUSCEPTIBILITY AND ELECTRICAL CONDUCTIVITY. THE TRANSITION TO THE
400 SUPERCONDUCTING STATE IS BROADENED UPON REDUCTION. SUBSEQUENT
400 ANNEALING OF THE REDUCED SAMPLES YIELDS MATERIALS WITH DISTINCT 90,
400 60 AND 20 K TRANSITIONS. THESE RESULTS INDICATE THAT THE OXYGEN
400 CONTENT IS THE PRIMARY FACTOR IN CONTROLLING T/SUB C/.
500 ANNEALING; BARIUM COMPOUNDS; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE
500 SEMICONDUCTORS AND INSULATORS; ELECTROCHEMISTRY; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; MAGNETIC SUSCEPTIBILITY; REDUCTION (CHEMICAL);
500 STOICHIOMETRY; SUPERCONDUCTING TRANSITION TEMPERATURE; X-RAY
500 DIFFRACTION EXAMINATION OF MATERIALS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; TRANSITION TEMPERATURE; O
510 CONTENT; CONTROLLED ROOM TEMPERATURE ELECTROCHEMICAL REDUCTION;
510 SUPERCONDUCTING TRANSITION BROADENING; SYNTHETIC ROUTE; METASTABLE
510 SUPERCONDUCTING PHASES; NONAQUEOUS ELECTROLYTE; X-RAY POWDER
510 DIFFRACTION; MAGNETIC SUSCEPTIBILITY; ELECTRICAL CONDUCTIVITY;
510 ANNEALING; 300 K; 90 K; 20 K; 60 K; YBA/SUB 2/CU/SUB 3/O/SUB 7-X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 3.0 E+02 K; TEMPERATURE 9.0 E+01 K; TEMPERATURE 2.0 E+01
560 K; TEMPERATURE 6.0 E+01 K.
DOCUMENT= 1246
AUTH = MOORE
DT = 02
KN = B40891300749
LG = ENGL
SN = ISSN 0167-577X
YR = 89
000 3381907
002 B40891300749
010 JOURNAL PAPER; EXPERIMENTAL.
100 SOL-GEL PROCESSING OF Y/SUB 2/BA/SUB 2/CU/SUB 3/O/SUB 7-X/ USING
100 ALKOXIDE PRECURSORS: TWO SYSTEMS YIELDING HIGH DEGREES OF THIN FILM
100 ORIENTATION AND CRYSTAL GROWTH.
200 MOORE, G.; KRAMER, S.; KORDAS, G.
220 DEPT. OF MATER. SCI. ? ENG., ILLINOIS UNIV., URBANA, IL, USA
310 MATER. LETT. (NETHERLANDS)
330 MARCH 1989. VOL.7, NO.12, P.415-24, REF.7
350 ISSN 0167-577X, CODEN MLETDJ
400 AN ALKOXIDE SOL-GEL CHEMISTRY HAS BEEN DEVELOPED TO FORM
400 SUPERCONDUCTING Y/SUB 1/BA/SUB 2/CU/SUB 3/O/SUB 7-X/ THIN FILMS AND
400 BULK POWDERS. THE CU(II) ETHOXIDE SYNTHESIS AND PROCESSING STEPS USED
400 TO OBTAIN A HOMOGENEOUS Y-BA-CU SOL ARE SPECIFICALLY OUTLINED. SOLS
400 WERE PRODUCED USING TWO DIFFERENT SOLVENT SYSTEMS: TOLUENE AND
400 METHOXYETHANOL/METHYLETHYLKETONE. BOTH SYSTEMS PROMOTE COMPLEXATION
400 OF INSOLUBLE CU(II) ETHOXIDE WITH THE BARIUM AND YTTRIUM PRECURSORS
400 ALLOWING THE FORMATION OF NANOMETER-SIZED SOLS. THERMAL GRAVIMETRIC
400 ANALYSIS (TGA) AND DIFFERENTIAL THERMAL ANALYSIS (DTA) WERE USED TO
400 CHARACTERIZE THE GEL DECOMPOSITION AND OXIDE FORMATION PROCESSES. THE
400 TOLUENE SYSTEM PRODUCED GELS HAVING A CRYSTALLIZATION TEMPERATURE OF
400 425 DEGREES C WHILE THE METHOXYETHANOL/METHYLETHYLKETONE PROCESSED
400 GEL CRYSTALLIZED AT 500 DEGREES C. THE
400 METHOXYETHANOL/METHYLETHYLKETONE GEL HAD ESSENTIALLY COMPLETE ORGANIC
400 BY-PRODUCT OXIDATION BY 475 DEGREES C. FILMS PRODUCED ON SINGLE
400 CRYSTAL SRTIO/SUB 3/ (FOR BOTH SYSTEMS) SHOWED A HIGH DEGREE OF
400 ORIENTATION AND CRYSTAL GROWTH.
500 BARIUM COMPOUNDS; CERAMICS; CRYSTAL GROWTH FROM SOLUTION;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SOL-GEL PROCESSING; SUPERCONDUCTING
500 THIN FILMS; THERMAL ANALYSIS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; THERMAL GRAVIMETRIC ANALYSIS;
510 ALKOXIDE PRECURSORS; THIN FILM ORIENTATION; CRYSTAL GROWTH; ALKOXIDE
510 SOL-GEL CHEMISTRY; BULK POWDERS; SOLVENT SYSTEMS; TOLUENE;
510 METHOXYETHANOL/METHYLETHYLKETONE; COMPLEXATION; INSOLUBLE CU(II)
510 ETHOXIDE; NANOMETER-SIZED SOLS; TGA; DIFFERENTIAL THERMAL ANALYSIS;
510 DTA; GEL DECOMPOSITION; OXIDE FORMATION; CRYSTALLIZATION TEMPERATURE;
510 ORGANIC BY-PRODUCT OXIDATION; 425 DEGC; 500 DEGC; 475 DEGC; Y/SUB
510 1/BA/SUB 2/CU/SUB 3/O/SUB 7-X/; SINGLE CRYSTAL SRTIO/SUB 3/.
550 Y1BA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS Y1/SS O/SS Y/SS; SRTIO3/SUR
550 TIO3/SUR O3/SUR SR/SUR TI/SUR O/SUR SRTIO3/SS TIO3/SS O3/SS SR/SS
550 TI/SS O/SS.
560 TEMPERATURE 6.98 E+02 K; TEMPERATURE 7.73 E+02 K; TEMPERATURE 7.48
560 E+02 K.
DOCUMENT= 1247
AUTH = DONGLU
DT = 02
KN = B40891300750
LG = ENGL
SN = ISSN 0167-577X
YR = 89
000 3381908
002 B40891300750
010 JOURNAL PAPER; EXPERIMENTAL.
100 SWAGGED SUPERCONDUCTING WIRES.
200 DONGLU, SHI / GORETTA, K.C.
220 DIV. OF MATER. SCI., ARGONNE NAT. LAB., IL, USA
310 MATER. LETT. (NETHERLANDS)
330 MARCH 1989. VOL.7, NO.12, P.428-32, REF.12
350 ISSN 0167-577X, CODEN MLETDJ
400 A 'POWDER-IN-TUBE' TECHNIQUE WAS USED TO PRODUCE LONG SUPERCONDUCTING
400 WIRES. CALCINED YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / POWDER WAS PUT
400 INTO A COPPER TUBE AND SWAGGED DOWN TO WIRE OF APPROXIMATELY 0.7 MM
400 IN DIAMETER. THE COPPER SHEATH WAS THEN REMOVED CHEMICALLY AND THE
400 SUPERCONDUCTOR CORE WAS SINTERED IN OXYGEN AT 910 DEGREES C. THE
400 CRITICAL CURRENT DENSITIES AT 77 K AND ZERO FIELD WERE COMPARABLE TO
400 THOSE OF OTHER BULK SPECIMENS, TYPICALLY RANGING FROM 200 TO 600
400 A/CM/SUP 2/.
500 BARIUM COMPOUNDS; CERAMICS; CRITICAL CURRENT DENSITY
500 (SUPERCONDUCTIVITY); HIGH-TEMPERATURE SUPERCONDUCTORS; POWDER
500 TECHNOLOGY; SINTERING; WIRES (ELECTRIC); YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; SWAGGED SUPERCONDUCTING WIRE;
510 POWDER IN TUBE TECHNIQUE; SINTERING; CALCINED SAMPLE; CRITICAL
510 CURRENT DENSITIES; 910 DEGC; 77 K; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA
510 / POWDER; CU SHEATH.
550 CU/EL; YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 1.18 E+03 K; TEMPERATURE 7.7 E+01 K.
DOCUMENT= 1248
AUTH = SEN
DT = 02
KN = B40891300751
LG = ENGL
SN = ISSN 0167-577X
YR = 89
000 3381909
002 B40891300751
010 JOURNAL PAPER; EXPERIMENTAL.
100 CREEP OF CUO-BAO MELTS ALONG THE CONTAINER WALL.
200 SEN, A.; DAS SHARMA, A.; MAITI, H.S.
220 CENTRAL GLASS ? CERAMIC RES. INST., CALCUTTA, INDIA
310 MATER. LETT. (NETHERLANDS)
330 MARCH 1989. VOL.7, NO.12, P.433-6, REF.9
350 ISSN 0167-577X, CODEN MLETDJ
400 AN APPARENTLY STRANGE CREEPING BEHAVIOUR OF CUO-BAO MELTS ALONG THE
400 CONTAINER WALL OR ANY SOLID SURFACE HAS BEEN OBSERVED. THE PHENOMENON
400 HAS BEEN STUDIED AND A MECHANISM, BASED ON THE MARANGONI EFFECT,
400 APPEARS TO BE THE CAUSE. IT IS SUGGESTED THAT THIS IS DUE TO
400 PREFERENTIAL SURFACE ADSORPTION OF BARIUM IONS. THE IMPLICATION OF
400 THIS PHENOMENON IN THE GROWTH OF SINGLE CRYSTALS OF YBA/SUB 2/CU/SUB
400 3/O/SUB 7-X/ SUPERCONDUCTORS HAS BEEN POINTED OUT.
500 ADSORPTION; BARIUM COMPOUNDS; CONVECTION; COPPER COMPOUNDS; CRYSTAL
500 GROWTH FROM MELT; HIGH-TEMPERATURE SUPERCONDUCTORS; SURFACE TENSION;
500 YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; CRYSTAL GROWTH; CONTAINER WALL;
510 CREEPING BEHAVIOUR; MARANGONI EFFECT; PREFERENTIAL SURFACE
510 ADSORPTION; SINGLE CRYSTALS; CUO-BAO MELTS; YBA/SUB 2/CU/SUB 3/O/SUB
510 7-X/.
550 CUO-BAO/INT BAO/INT CUO/INT BA/INT CU/INT O/INT BAO/BIN CUO/BIN
550 BA/BIN CU/BIN O/BIN; YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1249
AUTH = SHOUSHAN
DT = 02
KN = B40891300839
LG = ENGL
SN = ISSN 0144-8420
YR = 88
000 3381997
002 B40891300839
010 JOURNAL PAPER; EXPERIMENTAL.
100 THE DEPENDENCE OF THERMOLUMINESCENCE RESPONSE AND GLOW CURVE
100 STRUCTURE OF LIF(MG,CU,P) TL MATERIALS ON MG,CU,P DOPANTS
100 CONCENTRATION.
200 SHOUSHAN, W.
220 SOLID DOSIMETRIC DETECTOR ? METHOD LAB., BEIJING, CHINA
310 RADIAT. PROT. DOSIM. (UK)
330 1988. VOL.25, NO.2, P.133-6, REF.3
350 ISSN 0144-8420, CODEN RPDODE
400 THE RELATIONSHIP OF TL RESPONSE AND GLOW CURVE STRUCTURE OF
400 LIF(MG,CU,P) TO THE CONCENTRATION OF DOPANTS HAS BEEN INVESTIGATED
400 SYSTEMATICALLY. THE EXPERIMENTAL RESULTS HAVE SHOWN THAT THE RELATIVE
400 HEIGHT AND LIGHT INTEGRATION OF THE MAIN GLOW PEAK DEPEND STRONGLY
400 UPON THE TECHNIQUE OF PREPARING THE TL MATERIAL AND THE PROPORTION OF
400 DOPANTS. THE CHANGE OF MG, P CONCENTRATION INFLUENCES PRINCIPALLY THE
400 HEIGHT AND THE WIDTH OF THE MAIN GLOW PEAK (210 DEGREES C) AND THE
400 HIGHER TEMPERATURE PEAK (250 DEGREES C). THE CHANGE OF CU
400 CONCENTRATION INFLUENCES NOT ONLY THE 210 DEGREES C, 250 DEGREES C
400 PEAKS, BUT ALSO THE LOWER TEMPERATURE PEAK (110 DEGREES C). THE
400 PRESENT INVESTIGATION DEFINES AN OPTIMUM PROPORTION OF DOPANT
400 CONCENTRATIONS AND A PREPARATION PROCEDURE.
500 COPPER; LITHIUM COMPOUNDS; MAGNESIUM; PHOSPHORUS; THERMOLUMINESCENCE.
510 THERMOLUMINESCENCE RESPONSE; GLOW CURVE; TL MATERIALS; LIGHT
510 INTEGRATION; GLOW PEAK; 110 DEGC; 210 DEGC; 250 DEGC; LIF:MG; LIF:CU;
510 LIF:P.
550 LIF:MG/SS LI/SS MG/SS F/SS LIF/BIN LI/BIN F/BIN MG/EL MG/DOP;
550 LIF:CU/SS CU/SS LI/SS F/SS LIF/BIN LI/BIN F/BIN CU/EL CU/DOP;
550 LIF:P/SS LI/SS F/SS P/SS LIF/BIN LI/BIN F/BIN P/EL P/DOP.
560 TEMPERATURE 3.83 E+02 K; TEMPERATURE 4.83 E+02 K; TEMPERATURE 5.23
560 E+02 K.
DOCUMENT= 1250
AUTH = FROHLICH
DT = 02
KN = B40891300962
LG = ENGL
SN = ISSN 0010-3616
YR = 89
000 3382120
002 B40891300962
010 JOURNAL PAPER; THEORETICAL.
100 QUANTUM FIELD THEORIES OF VORTICES AND ANYONS.
200 FROHLICH, J. / MARCHETTI, P.A.
220 THEOR. PHYS., ETH-HONGGERBERG, ZURICH, SWITZERLAND
310 COMMUN. MATH. PHYS. (WEST GERMANY)
330 1989. VOL.121, NO.2, P.177-223, REF.40
350 ISSN 0010-3616, CODEN CMPHAY
400 THE AUTHORS DEVELOP THE QUANTIZATION OF TOPOLOGICAL SOLITONS
400 (VORTICES) IN THREE-DIMENSIONAL QUANTUM FIELD THEORY, IN TERMS OF THE
400 EUCLIDEAN REGION FUNCTIONAL INTEGRAL. THEY ANALYZE IN SOME DETAIL THE
400 VORTICES OF THE ABELIAN HIGGS MODEL. IF A CHERN-SIMONS TERM IS ADDED
400 TO THE ACTION, THE VORTICES TURN OUT TO BE 'ANYONS,' I.E. PARTICLES
400 WITH ARBITRARY REAL SPIN AND INTERMEDIATE ( THETA ) STATISTICS.
400 LOCALIZATION PROPERTIES OF THE INTERPOLATING FIELD, SCATTERING THEORY
400 AND SPIN-STATISTICS CONNECTION OF ANYONS ARE DISCUSSED. SUCH ANALYSIS
400 MIGHT BE RELEVANT IN CONNECTION WITH THE FRACTIONAL QUANTUM HALL
400 EFFECT AND TWO-DIMENSIONAL MODELS OF HIGH T/SUB C/ SUPERCONDUCTORS.
500 AXIOMATIC FIELD THEORY; GAUGE FIELD THEORY; NONLINEAR FIELD THEORY;
500 SOLITONS.
510 LOCALISATION PROPERTIES; QUANTIZATION; TOPOLOGICAL SOLITONS;
510 THREE-DIMENSIONAL QUANTUM FIELD THEORY; EUCLIDEAN REGION FUNCTIONAL
510 INTEGRAL; ABELIAN HIGGS MODEL; CHERN-SIMONS TERM; VORTICES;
510 INTERPOLATING FIELD; SCATTERING THEORY; SPIN-STATISTICS CONNECTION;
510 ANYONS; FRACTIONAL QUANTUM HALL EFFECT; HIGH T/SUB C/
510 SUPERCONDUCTORS.
DOCUMENT= 1251
AUTH = MATSUI
DT = 02
KN = B40891301938
LG = JAPA
SN = ISSN 0369-4585
YR = 89
000 3383096
002 B40891301938
010 JOURNAL PAPER; EXPERIMENTAL.
100 HIGH RESOLUTION TRANSMISSION ELECTRON MICROSCOPE STUDY OF MODULATED
100 STRUCTURES IN BISMUTH-BASED SUPERCONDUCTING OXIDES.
200 MATSUI, Y.
310 J. CRYSTALLOGR. SOC. JPN. (JAPAN)
330 JAN. 1989. VOL.31, NO.1, P.8-15, REF.22. (IN JAPANESE)
350 ISSN 0369-4585, CODEN NKEGAF
400 MODULATED STRUCTURES IN THE NEW-T/SUB C/ SUPERCONDUCTING OXIDES FOUND
400 IN A BI-SR-CA-CU-O SYSTEM ARE EXAMINED BY HIGH RESOLUTION
400 TRANSMISSION ELECTRON MICROSCOPY. STRONG LATTICE DISTORTIONS ARE
400 INDUCED IN THE (BI/SUB 2/O/SUB 2/) LAYERS TO FORM 'BI-CONCENTRATED'
400 AND 'BI-DEFICIENT' BANDS IN BOTH THE 80 K PHASE, BI/SUB 2/SR/SUB
400 2/CACU/SUB 2/O/SUB Y/ AND THE 110 K ONE, BI/SUB 2/SR/SUB 2/CA/SUB
400 2/CU/SUB 3/O/SUB Y/. THESE DISTORTION BANDS ARE ARRANGED TO FORM
400 BODY-CENTERED ORTHORHOMBIC LATTICES WITH B/SUB S/=2.6 NM, WHICH IS
400 ABOUT 4.8 TIMES THE B PARAMETER OF THE TETRAGONAL SUB-STRUCTURE.
400 TWINNING WITH A TWIN BOUNDARY AT THE CENTER OF THE BI/SUB 2/O/SUB 2/
400 LAYER IS ALSO OBSERVED IN THE 80 K PHASE. THE MODULATED STRUCTURE IN
400 THE 20 K PHASE BI/SUB 2/SR/SUB 2/CUO/SUB Y/ IS, ON THE OTHER HAND,
400 DESCRIBED BY THE MONOCLINIC STRUCTURE. STRUCTURAL RELATIONS OF
400 VARIOUS MODULATED STRUCTURES ARE DISCUSSED.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF
500 INORGANIC COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; LATTICE
500 CONSTANTS; STRONTIUM COMPOUNDS; TRANSMISSION ELECTRON MICROSCOPE
500 EXAMINATION OF MATERIALS; TWINNING.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; HRTEM; TWINNING; MODULATED
510 STRUCTURES; SUPERCONDUCTING OXIDES; HIGH RESOLUTION TRANSMISSION
510 ELECTRON MICROSCOPY; LATTICE DISTORTIONS; (BI/SUB 2/O/SUB 2/) LAYERS;
510 DISTORTION BANDS; BODY-CENTERED ORTHORHOMBIC LATTICES; B PARAMETER;
510 TETRAGONAL SUB-STRUCTURE; TWIN BOUNDARY; MONOCLINIC STRUCTURE; 80 K;
510 110 K; 20 K; BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB Y/; BI/SUB 2/SR/SUB
510 2/CA/SUB 2/CU/SUB 3/O/SUB Y/; BI/SUB 2/SR/SUB 2/CUO/SUB Y/.
550 BI2SR2CACU2O/SS BI2/SS CU2/SS SR2/SS BI/SS CA/SS CU/SS SR/SS O/SS;
550 BI2SR2CA2CU3O/SS BI2/SS CA2/SS CU3/SS SR2/SS BI/SS CA/SS CU/SS SR/SS
550 O/SS; BI2SR2CUO/SS BI2/SS SR2/SS BI/SS CU/SS SR/SS O/SS.
560 TEMPERATURE 8.0 E+01 K; TEMPERATURE 1.1 E+02 K; TEMPERATURE 2.0 E+01
560 K.
DOCUMENT= 1252
AUTH = KUZMANN
DT = 06
KN = B40891301993
LG = ENGL
SN = ISSN 0304-3843
YR = 89
000 3383151
002 B40891301993
010 CONFERENCE PAPER; EXPERIMENTAL.
100 /SUP 119/SN AND /SUP 151/EU MOSSBAUER STUDY OF EUBA/SUB 2/(CU/SUB
100 1-X/SN/SUB X/)/SUB 3/O/SUB 7-Y/ PEROVSKITES.
200 KUZMANN, E.; HOMONNAY, Z.; VERTES, A. / KIRSCHNER, I.; GAL, M.;
200 TORKOS, K.; CSAKVARI, B.; SOLYMOS, K.; HORVATH, G.; BANKUTI, J.;
200 KORECZ, L.
220 LAB. OF NUCL. CHEM., EOTVOS UNIV., BUDAPEST, HUNGARY
300 ISIAME '88. INTERNATIONAL SYMPOSIUM ON THE INDUSTRIAL APPLICATIONS OF
300 THE MOSSBAUER EFFECT.
305 PARMA, ITALY. 12-16 SEPT. 1988. UNIV. PARMA. UNIV. PADOVA. COMM.
305 EUR. COMMUNITIES. ET AL.
310 HYPERFINE INTERACT. (SWITZERLAND)
330 MARCH 1989. VOL.46, NO.1-4, P.747-52, REF.10
350 ISSN 0304-3843, CODEN HYINDN
400 EU AND SN MOSSBAUER SPECTROSCOPY WAS USED TO STUDY EUBA/SUB 2/(CU/SUB
400 1-X/SN/SUB X/)/SUB 3/O/SUB 7-Y/ METALLIC OXIDES. THE SPECTRA ARE
400 CHARACTERISTIC FOR EU/SUP III/ AND SN/SUP IV/ STATES IN ALL CASES.
400 THE EXISTENCE OF AT LEAST TWO DIFFERENT SN STATES WAS DETERMINED BY
400 DECOMPOSITION OF THE SN MOSSBAUER SPECTRA. THESE SN SITES CAN BE
400 ASSOCIATED WITH NONEQUIVALENT CU SITES REPLACED BY SN ATOMS IN THE
400 PEROVSKITE TYPE LATTICE. ANOMALOUS CHANGES WERE OBSERVED IN THE
400 ISOMER SHIFTS AND AREA FRACTIONS IN THE SPECTRA MEASURED AT ROOM
400 TEMPERATURE AND AT 77 K. IT CAN BE INTERPRETED ASSUMING A LOW
400 TEMPERATURE PHASE TRANSFORMATION AND PHONON SOFTENING. TIME DEPENDENT
400 CHANGES WERE FOUND IN THE SN SPECTRA RECORDED AT 77 K IN THE CASE OF
400 HIGHEST SN CONCENTRATION. THE OBSERVED CHANGES ARE CONSISTENT WITH A
400 TRANSITIONAL STAGE OF THE LOW TEMPERATURE PHASE TRANSFORMATION.
500 BARIUM COMPOUNDS; EUROPIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; ISOMER SHIFT; MOSSBAUER EFFECT; SOFT MODES;
500 SOLID-STATE PHASE TRANSFORMATIONS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; /SUP 119/SN; /SUP 151/EU;
510 PEROVSKITES; MOSSBAUER SPECTROSCOPY; ISOMER SHIFTS; PHONON SOFTENING;
510 LOW TEMPERATURE PHASE TRANSFORMATION; EUBA/SUB 2/(CU/SUB 1-X/SN/SUB
510 X/)/SUB 3/O/SUB 7-Y/.
550 EUBA2CUSNO/SS BA2/SS BA/SS CU/SS EU/SS SN/SS O/SS.
DOCUMENT= 1253
AUTH = BITTAR
DT = 02
KN = B40891302174
LG = ENGL
SN = ISSN 0740-3224
YR = 89
000 3383332
002 B40891302174
010 JOURNAL PAPER; EXPERIMENTAL.
100 DIFFUSE REFLECTANCE AND ITS RELATIONSHIP TO OXYGEN CONTENT IN YBA/SUB
100 2/CU/SUB 3/O/SUB 7- DELTA / AND BI/SUB 2.1/(CA/SUB X/SR/SUB 1-X/)/SUB
100 N+1/CU/SUB N/O/SUB 2N+4+ DELTA / (N=1,2).
200 BITTAR, A.; STAINES, M.P.; BUCKLEY, R.G.
220 DSIR, PHYS. ? ENG. LAB., LOWER HUTT, NEW ZEALAND
310 J. OPT. SOC. AM. B, OPT. PHYS. (USA)
330 MARCH 1989. VOL.6, NO.3, P.385-8, REF.14
350 ISSN 0740-3224, CODEN JOBPDE
400 THE AUTHORS REPORT ON VARIATIONS OF THE DIFFUSE REFLECTANCE OF THE
400 YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / AND BI/SUB 2.1/(CA/SUB X/SR/SUB
400 1-X/)/SUB N+1/CU/SUB N/O/SUB 2N+4+ DELTA / (N=1,2) SUPERCONDUCTING
400 CERAMICS WITH OXYGEN CONTENT 0< DELTA <0.8. THEY MODEL THE DIFFUSE
400 REFLECTANCE OF THE CERAMICS AND SHOW THAT THE OBSERVED NEAR-INFRARED
400 EDGE MAY BE APPROXIMATED BY A SINGLE-CARRIER FREE-ELECTRON DRUDE
400 MODEL. FOR THE BISMUTH-BASED COMPOUNDS, THE INFRARED DRUDE EDGE AND
400 STRUCTURES AT APPROXIMATELY 2.0 AND APPROXIMATELY=3.8 EV SHOW LITTLE
400 VARIATION WITH DELTA . FOR THE YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /,
400 THE DRUDE EDGE AND THE INTERBAND FEATURES VARY STRONGLY WITH DELTA .
400 THE INTERBAND PEAKS AT 1.7 AND 4.1 EV ARE BOTH ATTRIBUTED TO
400 TRANSITIONS INVOLVING THE OXYGEN-LOADING COPPER PLANES.
500 BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CERAMICS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; INFRARED SPECTRA OF INORGANIC
500 SOLIDS; REFLECTIVITY; STRONTIUM COMPOUNDS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; O CONTENT; DIFFUSE REFLECTANCE;
510 CERAMICS; NEAR-INFRARED EDGE; SINGLE-CARRIER FREE-ELECTRON DRUDE
510 MODEL; INTERBAND PEAKS; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /; BI/SUB
510 2.1/(CA/SUB X/SR/SUB 1-X/)/SUB N+1/CU/SUB N/O/SUB 2N+4+ DELTA /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; BI2.1CASRCUO/SS
550 BI2.1/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1254
AUTH = EKLUND
DT = 02
KN = B40891302175
LG = ENGL
SN = ISSN 0740-3224
YR = 89
000 3383333
002 B40891302175
010 JOURNAL PAPER; EXPERIMENTAL.
100 POLARIZED REFLECTIVITY STUDIES OF SINGLE-CRYSTAL LA/SUB 2/CUO/SUB 4/.
200 EKLUND, P.C.; RAO, A.M.; LEHMAN, G.W. / DOLL, G.L.; DRESSELHAUS,
200 M.S.; PICONE, P.J.; GABBE, D.R.; JENSSEN, H.P.; DRESSELHAUS, G.
220 DEPT. OF PHYS. ? ASTRON., KENTUCKY UNIV., LEXINGTON, KY, USA
310 J. OPT. SOC. AM. B, OPT. PHYS. (USA)
330 MARCH 1989. VOL.6, NO.3, P.389-95, REF.38
350 ISSN 0740-3224, CODEN JOBPDE
400 ROOM-TEMPERATURE POLARIZED REFLECTIVITY MEASUREMENTS ARE REPORTED FOR
400 SINGLE-CRYSTAL LA/SUB 2/CUO/SUB 4/ FOR THE (E PERPENDICULAR TO C) AND
400 (E//C) POLARIZATIONS, WHERE C DENOTES THE TETRAGONAL AXIS. A
400 KRAMERS-KRONIG ANALYSIS IS PERFORMED TO OBTAIN THE
400 FREQUENCY-DEPENDENT DIELECTRIC FUNCTIONS. FREQUENCIES FOR THE SEVEN
400 ZONE-CENTER IR-ACTIVE PHONONS ARE OBTAINED AND THE
400 LONGITUDINAL-OPTIC-TRANSVERSE-OPTIC SPLITTINGS ARE USED TO EVALUATE
400 THE DYNAMIC CHARGE ON THE OXYGEN ATOMS. THE REFLECTIVITY SPECTRUM FOR
400 THE (E PERPENDICULAR TO C) POLARIZATION IS DECIDEDLY METALLIC AND IS
400 FITTED ACCORDINGLY WITH AN OVERDAMPED DRUDE MODEL AND A PLASMA
400 FREQUENCY OF 95 MEV. IN THE HIGH-FREQUENCY REGION OF THE SPECTRUM,
400 SELECTION RULES ARE OBSERVED FOR ALLOWED AND FORBIDDEN ELECTRONIC
400 TRANSITIONS. THE IMPORTANCE OF THIS STUDY TO THE INTERPRETATION OF
400 OPTICAL MEASUREMENTS ON HIGH-T/SUB C/ POLYCRYSTALLINE PELLETS OF
400 LA/SUB 2/CUO/SUB 4/ AND RELATED MATERIALS IS ALSO DISCUSSED.
500 DIELECTRIC FUNCTION; KRAMERS-KRONIG RELATIONS; LANTHANUM COMPOUNDS;
500 REFLECTIVITY.
510 POLARIZED REFLECTIVITY; KRAMERS-KRONIG ANALYSIS; DIELECTRIC
510 FUNCTIONS; IR-ACTIVE PHONONS; REFLECTIVITY SPECTRUM; DRUDE MODEL;
510 ELECTRONIC TRANSITIONS; LA/SUB 2/CUO/SUB 4/.
550 LA2CUO4/SS LA2/SS CU/SS LA/SS O4/SS O/SS.
DOCUMENT= 1255
AUTH = LU
DT = 02
KN = B40891302176
LG = ENGL
SN = ISSN 0740-3224
YR = 89
000 3383334
002 B40891302176
010 JOURNAL PAPER; EXPERIMENTAL.
100 OPTICAL REFLECTIVITY STUDIES OF MAGNETICALLY ORIENTED YBA/SUB
100 2/CU/SUB 3/O/SUB 7- DELTA /.
200 LU, F.; PERRY, C.H.; CHEN, K.; MARKIEWICZ, R.S.
220 NORTHEASTERN UNIV., BOSTON, MA, USA
310 J. OPT. SOC. AM. B, OPT. PHYS. (USA)
330 MARCH 1989. VOL.6, NO.3, P.396-402, REF.27
350 ISSN 0740-3224, CODEN JOBPDE
400 THE OPTICAL REFLECTIVITY SPECTRA OF MAGNETICALLY ORIENTED YBA/SUB
400 2/CU/SUB 3/O/SUB 7- DELTA / ARE REPORTED OVER A WIDE ENERGY RANGE
400 FROM 50 TO 24000 CM/SUP -1/ (6 MEV TO 3 EV). A STRONG OPTICAL
400 ANISOTROPY IS OBSERVED, WITH MOST PHONON MODES ASSOCIATED WITH THE
400 E//C SPECTRUM. AN ANISOTROPIC EFFECTIVE-MEDIUM THEORY IS USED TO
400 PERMIT DIRECT COMPARISON OF THESE DATA WITH SPECTRA FROM UNORIENTED
400 GRAINS. THE EXCITONIC FEATURE IS FOUND TO BE CONSIDERABLY MORE
400 INTENSE IN THE UNORIENTED SAMPLE.
500 BARIUM COMPOUNDS; EXCITONS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 INFRARED SPECTRA OF INORGANIC SOLIDS; KRAMERS-KRONIG RELATIONS;
500 LATTICE PHONONS; REFLECTIVITY; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; MAGNETIC ORIENTATION; KRAMERS-KRONIG
510 ANALYSIS; OPTICAL REFLECTIVITY SPECTRA; OPTICAL ANISOTROPY; PHONON
510 MODES; ANISOTROPIC EFFECTIVE-MEDIUM THEORY; EXCITONIC FEATURE;
510 YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1256
AUTH = NICHOL
DT = 02
KN = B40891302177
LG = ENGL
SN = ISSN 0740-3224
YR = 89
000 3383335
002 B40891302177
010 JOURNAL PAPER; EXPERIMENTAL.
100 INFRARED STUDIES OF SINGLE-CRYSTAL LA/SUB 2-X/SR/SUB X/CUO/SUB 4-
100 DELTA / AND YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
200 NICHOL, A.C.; PRATT, F.L.; HAYES, W.; CHEN, C.; WATTS, B.E.; WANKLYN,
200 B.M.
220 CLARENDON LAB., OXFORD UNIV., UK
310 J. OPT. SOC. AM. B, OPT. PHYS. (USA)
330 MARCH 1989. VOL.6, NO.3, P.403-8, REF.35
350 ISSN 0740-3224, CODEN JOBPDE
400 POLARIZED INFRARED REFLECTANCE MEASUREMENTS ARE REPORTED FOR CRYSTALS
400 OF LA/SUB 2-X/SR/SUB X/CUO/SUB 4- DELTA / AND YBA/SUB 2/CU/SUB
400 3/O/SUB 7- DELTA /. FREE-CARRIER REFLECTANCE IS OBSERVED IN THE
400 COPPER OXIDE PLANES, AND STRONG PHONONS ARE OBSERVED IN THE
400 PERPENDICULAR DIRECTION. THE INTERPRETATION OF THE INFRARED OPTICAL
400 PROPERTIES IS DISCUSSED.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; INFRARED SPECTRA
500 OF INORGANIC SOLIDS; LANTHANUM COMPOUNDS; LATTICE PHONONS;
500 REFLECTIVITY; STRONTIUM COMPOUNDS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; POLARISED IR REFLECTANCE; FREE
510 CARRIER REFLECTANCE; PHONONS; INFRARED OPTICAL PROPERTIES; LA/SUB
510 2-X/SR/SUB X/CUO/SUB 4- DELTA /; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 LASRCUO/SS CU/SS LA/SS SR/SS O/SS; YBA2CU3O/SS BA2/SS CU3/SS BA/SS
550 CU/SS O/SS Y/SS.
DOCUMENT= 1257
AUTH = RUANI
DT = 02
KN = B40891302178
LG = ENGL
SN = ISSN 0740-3224
YR = 89
000 3383336
002 B40891302178
010 JOURNAL PAPER; EXPERIMENTAL.
100 DEPENDENCE OF THE INFRARED ABSORPTION ON OXYGEN DEFICIENCY IN THE
100 YBA/SUB 2/CU/SUB 3/O/SUB 7-Y/ SUPERCONDUCTING SYSTEM.
200 RUANI, G.; TALIANI, C.; ZAMBONI, R. / CITTONE, D.; MATACOTTA, F.C.
220 ISTITUTO DI SPETTROSCOPIA MOLECOLARE, CNR, BOLOGNA, ITALY
310 J. OPT. SOC. AM. B, OPT. PHYS. (USA)
330 MARCH 1989. VOL.6, NO.3, P.409-14, REF.32
350 ISSN 0740-3224, CODEN JOBPDE
400 THE YBA/SUB 2/CU/SUB 3/O/SUB 7-Y/ SUPERCONDUCTING SYSTEM AT VARIABLE
400 O DEFICIENCY (0.051000 CM/SUP -1/) SCATTERING IN BA/SUB
400 2/YCU/SUB 3/O/SUB 6/ AND BA/SUB 2/YCU/SUB 3/O/SUB 7/.
500 BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM COMPOUNDS; LATTICE
500 PHONONS; RAMAN SPECTRA OF INORGANIC SOLIDS; STRONTIUM COMPOUNDS;
500 YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; SINGLE CRYSTALS; NORMAL MODE; RAMAN
510 SPECTRA; CERAMICS; BA/SUB 2/YCU/SUB 3/O/SUB 7/; BA/SUB 2/YCU/SUB
510 3/O/SUB 6/; SR/SUB 2/YCU/SUB 2.4/AL/SUB 0.6/O/SUB 7/; BA/SUB
510 2-X/LA/SUB 1+X/CU/SUB 3/O/SUB 7+ DELTA /; BI/SUB 2/SR/SUB 2/CA/SUB
510 N-1/CU/SUB N/O/SUB 4+2N/.
550 BA2YCU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS; BA2YCU3O6/SS
550 BA2/SS CU3/SS BA/SS CU/SS O6/SS O/SS Y/SS; SR2YCU2.4AL0.6O7/SS
550 AL0.6/SS CU2.4/SS SR2/SS AL/SS CU/SS O7/SS SR/SS O/SS Y/SS;
550 BALACU3O/SS CU3/SS BA/SS CU/SS LA/SS O/SS; BI2SR2CACUO/SS BI2/SS
550 SR2/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1263
AUTH = WEBER
DT = 02
KN = B40891302184
LG = ENGL
SN = ISSN 0740-3224
YR = 89
000 3383342
002 B40891302184
010 JOURNAL PAPER; BIBLIOGRAPHY, REVIEW, EXPERIMENTAL.
100 RAMAN STUDIES OF LANTHANUM CUPRATE SUPERCONDUCTORS.
200 WEBER, W.H.; PETERS, C.R.; LOGOTHETIS, E.M.
220 FORD MOTOR CO., DEARBORN, MI, USA
310 J. OPT. SOC. AM. B, OPT. PHYS. (USA)
330 MARCH 1989. VOL.6, NO.3, P.455-64, REF.68
350 ISSN 0740-3224, CODEN JOBPDE
400 RAMAN-SCATTERING STUDIES OF THE HIGH-T/SUB C/ SUPERCONDUCTOR LA/SUB
400 2-X/(SR,BA)/SUB X/CUO/SUB 4/ ARE BRIEFLY REVIEWED. A DETAILED
400 ANALYSIS OF THE PHONON-MODE SYMMETRIES IS GIVEN ALONG WITH A
400 DISCUSSION OF THE EFFECTS EXPECTED FROM THE
400 ORTHORHOMBIC-TO-TETRAGONAL PHASE TRANSITION, WHICH IS KNOWN TO OCCUR
400 IN THESE MATERIALS. SURVEY SPECTRA ARE GIVEN FOR POWDERS, CERAMICS,
400 AND SINGLE CRYSTALS, AND AN OXIDE OF CU IS IDENTIFIED AS THE PRIMARY
400 IMPURITY PHASE. EXTENSIVE SPECTRA ARE GIVEN FROM ORIENTED SINGLE
400 CRYSTALS OF LA/SUB 2/CUO/SUB 4/ AND LA/SUB 1.85/SR/SUB 0.15/CUO/SUB
400 4/, AND SEVERAL MODE ASSIGNMENTS ARE MADE. SPECTRA FOR THE
400 HIGH-TEMPERATURE TETRAGONAL PHASE AND THE LOW-TEMPERATURE
400 ORTHORHOMBIC PHASE ARE GIVEN FOR EACH MATERIAL. THE SOFT PHONON
400 ASSOCIATED WITH THE PHASE TRANSITION IS SEEN IN LA/SUB 2/CUO/SUB 4/
400 AS IS A BROAD PEAK ARISING FROM TWO-MAGNON SCATTERING. NEITHER OF
400 THESE FEATURES IS SEEN IN THE SR-DOPED SAMPLE.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM
500 COMPOUNDS; RAMAN SPECTRA OF INORGANIC SOLIDS; SOFT MODES; SOLID-STATE
500 PHASE TRANSFORMATIONS; STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; PHONON-MODE SYMMETRIES; POWDERS;
510 CERAMICS; SINGLE CRYSTALS; SOFT PHONON; PHASE TRANSITION; TWO-MAGNON
510 SCATTERING; LA/SUB 2/CUO/SUB 4/; LA/SUB 1.85/SR/SUB 0.15/CUO/SUB 4/;
510 LA/SUB 2-X/(SRBA)/SUB X/CUO/SUB 4/.
550 LASRBACUO4/SS BA/SS CU/SS LA/SS O4/SS SR/SS O/SS; LA2CUO4/SS LA2/SS
550 CU/SS LA/SS O4/SS O/SS; LA1.85SR0.15CUO4/SS LA1.85/SS SR0.15/SS CU/SS
550 LA/SS O4/SS SR/SS O/SS.
DOCUMENT= 1264
AUTH = DURNY
DT = 02
KN = B40891302185
LG = ENGL
SN = ISSN 0740-3224
YR = 89
000 3383343
002 B40891302185
010 JOURNAL PAPER; EXPERIMENTAL.
100 ABSORPTION OF MICROWAVES IN SUPERCONDUCTING YBA/SUB 2/CU/SUB 3/O/SUB
100 7/ AND FIELD-COOLING EFFECTS.
200 DURNY, R.; DUCHARME, S.; HAUTALA, J.; ZHENG, D.J.; SYMKO, O.G.;
200 TAYLOR, P.C. / KULKARNI, S.
220 DEPT. OF PHYS. UTAH UNIV., SALT LAKE CITY, UT, USA
310 J. OPT. SOC. AM. B, OPT. PHYS. (USA)
330 MARCH 1989. VOL.6, NO.3, P.465-9, REF.30
350 ISSN 0740-3224, CODEN JOBPDE
400 MEASUREMENTS OF MAGNETIC-FIELD-DEPENDENT MICROWAVE ABSORPTION AS A
400 FUNCTION OF BOTH THE TEMPERATURE (4K TO T/SUB C/) AND COOLING FIELDS
400 (0-10 KG) ARE REPORTED. BELOW A CERTAIN CHARACTERISTIC TEMPERATURE,
400 T*OR=10 K. ONE
400 OF THE FIRST SUPERCONDUCTORS WHICH WERE PRODUCED WAS NB/SUB 3/SN ON
400 TAPES AND SINGLE WIRES. THIS SUPERCONDUCTING MATERIAL IS, HOWEVER,
400 TODAY PRODUCED BY METALLURGICAL METHODS. SINCE THE DETECTION OF
400 NB/SUB 3/GE, CVD HAS BECOME FOR THESE COATINGS THE MAIN METHOD OF
400 PRODUCTION FOR THE FOLLOWING REASONS: HIGH DEPOSITION RATES,
400 POSSIBILITY TO DOPE THE MATERIAL BY ADDITION OF FURTHER DOPING GASES
400 TO THE CVD-PROCESS, CONTINUOUS PROCESS. THESE COATINGS WERE DEPOSITED
400 ON TAPES. FOR THE FIRST TIME THE LARGE THROWING POWER OF THE CVD
400 PROCESS WAS UTILIZED FOR THE DEPOSITION OF B1-NBC/SUB X/N/SUB Y/ ON
400 CARBON FIBRE BUNDLES. THIS OPENS THE POSSIBILITY OF PRODUCING
400 MULTIFILAMENTARY STRUCTURES USED FOR MAGNETIC APPLICATIONS. THE
400 STRUCTURE OF THE COATING CAN BE VARIED BY CHANGING THE GAS
400 PROPERTIES, BY ADDITION OF FURTHER GASES, BY AN ULTRASONIC FIELD, BY
400 IGNITION OF A GAS DISCHARGE AND BY MULTI-LAYERING. CVD COULD ALSO BE
400 A PROSPECTIVE METHOD FOR PRODUCING THE NEW CLASS OF SUPERCONDUCTORS
400 WITH T/SUB C/>OR=30 K.
500 CHEMICAL VAPOUR DEPOSITION; COMPOSITE SUPERCONDUCTORS; REVIEWS;
500 SUPERCONDUCTING MATERIALS.
510 CHEMICAL VAPOUR DEPOSITION; CVD; HIGH-TEMPERATURE SUPERCONDUCTING
510 MATERIALS; MULTIFILAMENTARY STRUCTURES.
DOCUMENT= 1294
AUTH = MATSUOKA
DT = 02
KN = B40891303734
LG = ENGL
SN = ISSN 0022-3727
YR = 89
000 3384892
002 B40891303734
010 JOURNAL PAPER; EXPERIMENTAL.
100 EFFECTS OF FINE AG PARTICLES ON HIGH-T/SUB C/ SCREEN-PRINTED
100 Y-BA-CU-O FILMS.
200 MATSUOKA, Y.; BAN, E. / OGAWA, H.
220 DEPT. OF PHYS., MEIJO UNIV., NAGOYA, JAPAN
310 J. PHYS. D, APPL. PHYS. (UK)
330 14 APRIL 1989. VOL.22, NO.4, P.564-5, REF.8
350 ISSN 0022-3727, CODEN JPAPBE
400 Y-BA-CU-O.AG METAL MIXED THICK FILMS WERE PREPARED ON YSZ SUBSTRATES
400 BY THE SCREEN-PRINTING TECHNIQUE. IT WAS FOUND THAT THE ADDITION OF
400 FINE AG PARTICLES GREATLY ENHANCED THE SUPERCONDUCTING PROPERTY OF
400 THE FILMS.
500 BARIUM COMPOUNDS; CRITICAL CURRENT DENSITY (SUPERCONDUCTIVITY);
500 HIGH-TEMPERATURE SUPERCONDUCTORS; IMPURITIES; SILVER; SUPERCONDUCTING
500 TRANSITION TEMPERATURE; THICK FILMS; YTTRIUM COMPOUNDS.
510 CRITICAL TEMPERATURE; CRITICAL CURRENT DENSITY; HIGH-TEMPERATURE
510 SUPERCONDUCTORS; THICK FILMS; SCREEN-PRINTING TECHNIQUE; YBACUO:AG.
550 YBACUO:AG/SS YBACUO/SS AG/SS BA/SS CU/SS O/SS Y/SS AG/EL AG/DOP.
DOCUMENT= 1295
AUTH = MAKAROV
DT = 02
KN = B40891303785
LG = ENGL
SN = ISSN 0370-274X
YR = 88
000 3384943
002 B40891303785
010 JOURNAL PAPER; EXPERIMENTAL.
100 ACOUSTIC CHARACTERISTICS AND STRUCTURAL FEATURES OF THE VIBRATION
100 SPECTRUM OF THE LA/SUB 2-X/SR/SUB X/CUO/SUB 4/ (X=0 AND 0.2) LATTICE
100 AND THE YBA/SUB 2/CU/SUB 3/O/SUB Y/ (Y=6 AND 7) LATTICE.
200 MAKAROV, V.I.; ZAVARITSKII, N.V.; KLOCHKO, V.S.; VORONOV, A.P.;
200 TKACHENKO, V.F.
220 INST. OF PHYS. PROBLEMS, ACAD. OF SCI., PHYSICOTECH. INST., KHAR'KOV,
220 UKRAINIAN SSR, USSR
310 PIS'MA ZH. EKSP. TEOR. FIZ. (USSR)
330 25 SEPT. 1988. VOL.48, NO.6, P.326-9, REF.16
331 ENGLISH TRANSLATION: JETP LETT. (USA). 25 SEPT. 1988. VOL.48, NO.6,
331 P.359-64. CODEN JTPLA2. ISSN 0021-3640
350 ISSN 0370-274X, CODEN PZETAB
400 IN THE COMPOUNDS LA/SUB 2-X/SR/SUB X/CUO/SUB 4/(X=0, 0.2) AND YBA/SUB
400 2/CU/SUB 3/O/SUB Y/ (Y=7, 6) THE TEMPERATURE-DEPENDENT VARIATION OF
400 THE ABSORPTION OF LONGITUDINAL SOUND, ALPHA (T), AND THE VARIATION IN
400 ITS VELOCITY, S(T), ARE SIMILAR WHEN X=0 AND 0.2 AND Y=6 AND 7. THE
400 ANOMALOUS TEMPERATURE BEHAVIOR OF ALPHA AND S IS ATTRIBUTABLE TO THE
400 INTERACTION OF SOUND WITH THE SOFT OPTICAL MODES.
500 ACOUSTIC WAVE ABSORPTION; ACOUSTIC WAVE VELOCITY; BARIUM COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM COMPOUNDS; SOFT MODES;
500 STRONTIUM COMPOUNDS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ACOUSTIC CHARACTERISTICS;
510 LONGITUDINAL SOUND ABSORPTION; ACOUSTIC VELOCITY; CERAMIC; STRUCTURAL
510 FEATURES; VIBRATION SPECTRUM; ANOMALOUS TEMPERATURE BEHAVIOR; SOFT
510 OPTICAL MODES; 20 MHZ; 50 MHZ; LA/SUB 2-X/SR/SUB X/CUO/SUB 4/;
510 YBA/SUB 2/CU/SUB 3/O/SUB Y/.
550 LASRCUO4/SS CU/SS LA/SS O4/SS SR/SS O/SS; YBA2CU3O/SS BA2/SS CU3/SS
550 BA/SS CU/SS O/SS Y/SS.
560 FREQUENCY 2.0 E+07 HZ; FREQUENCY 5.0 E+07 HZ.
DOCUMENT= 1296
AUTH = VESNIN
DT = 02
KN = B40891303786
LG = ENGL
SN = ISSN 0370-274X
YR = 88
000 3384944
002 B40891303786
010 JOURNAL PAPER; EXPERIMENTAL.
100 ANISOTROPY OF ESR ABSORPTION OF SINGLE CRYSTALS OF R-BA-CU-O
100 SUPERCONDUCTORS (REGION OF WEAK MAGNETIC FIELDS).
200 VESNIN, YU.I.; ISTOMIN, V.E.; KOSTSOV, E.G.
220 INST. OF AUTOM. ? ELECTROMETRY, ACAD. OF SCI., USSR
310 PIS'MA ZH. EKSP. TEOR. FIZ. (USSR)
330 25 SEPT. 1988. VOL.48, NO.6, P.338-41, REF.15
331 ENGLISH TRANSLATION: JETP LETT. (USA). 25 SEPT. 1988. VOL.48, NO.6,
331 P.374-7. CODEN JTPLA2. ISSN 0021-3640
350 ISSN 0370-274X, CODEN PZETAB
400 IN R-BA-CU-O SINGLE CRYSTALS AT T=77-92 K, A LOW-FIELD ESR ABSORPTION
400 IS POSSIBLE ONLY FOR CERTAIN ORIENTATIONS OF THE PLANE OF THE CRYSTAL
400 WITH RESPECT TO THE DIRECTIONS OF THE STATIC MAGNETIC FIELD H/SUB =/
400 AND THE ALTERNATING MAGNETIC FIELD. THIS ABSORPTION REACHES A MAXIMUM
400 WHEN THE C AXIS OF THE CRYSTAL MAKES A 45 DEGREES ANGLE WITH H/SUB
400 =/.
500 BARIUM COMPOUNDS; ERBIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 PARAMAGNETIC RESONANCE OF IRON GROUP IONS AND IMPURITIES; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ANISOTROPY; ESR ABSORPTION; SINGLE
510 CRYSTALS; WEAK MAGNETIC FIELDS; 77 TO 92 K; YBA/SUB 2/CU/SUB 3/O/SUB
510 7-Y/; ERBA/SUB 2/CU/SUB 3/O/SUB 7-Y/.
550 BA/SS CU/SS O/SS; YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS;
550 ERBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS ER/SS O/SS.
560 TEMPERATURE 7.7 E+01 TO 9.2 E+01 K.
DOCUMENT= 1297
AUTH = NIFONTOV
DT = 02
KN = B40891303787
LG = ENGL
SN = ISSN 0370-274X
YR = 88
000 3384945
002 B40891303787
010 JOURNAL PAPER; EXPERIMENTAL.
100 THE STRUCTURE OF TETRAGONAL COMPOUND YBA/SUB 2/CU/SUB 3-X/O/SUB 6-Y/
100 IN THE TEMPERATURE REGION 100-1000 K.
200 NIFONTOV, V.P.; PONOMAREV, V.I.; ATOVMYAN, L.O.; OVANESAN, N.S.;
200 EMEL'CHENKO, G.A.; TATARCHENKO, V.A.
220 INST. OF CHEM. PHYS., ACAD. OF SCI., USSR
310 PIS'MA ZH. EKSP. TEOR. FIZ. (USSR)
330 25 SEPT. 1988. VOL.48, NO.6, P.345-7, REF.3
331 ENGLISH TRANSLATION: JETP LETT. (USA). 25 SEPT. 1988. VOL.48, NO.6,
331 P.382-4. CODEN JTPLA2. ISSN 0021-3640
350 ISSN 0370-274X, CODEN PZETAB
400 THE ATOMIC AND CRYSTAL STRUCTURE OF A SINGLE CRYSTAL IS STUDIED OVER
400 A BROAD TEMPERATURE RANGE BY MEANS OF X-RAY STRUCTURAL ANALYSIS. THE
400 RELATIVE 'RIGIDITY' OF THE ATOMIC TRIAD OL-CUL-OL' IS DETERMINED ON
400 THE BASIS OF AN ANALYSIS OF THE CHANGE IN THE THERMAL VIBRATIONS OF
400 ATOMS AND THE ATOMIC SPACING.
500 BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ATOMIC STRUCTURE; TETRAGONAL
510 COMPOUND; CRYSTAL STRUCTURE; SINGLE CRYSTAL; X-RAY STRUCTURAL
510 ANALYSIS; THERMAL VIBRATIONS; ATOMIC SPACING; 100 TO 1000 K; YBA/SUB
510 2/CU/SUB 3-X/O/SUB 6-Y/.
550 YBA2CUO/SS BA2/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 1.0 E+02 TO 1.0 E+03 K.
DOCUMENT= 1298
AUTH = ZHU
DT = 02
KN = B40891303846
LG = ENGL
NF = MGU6323
SN = ISSN 0022-4596
YR = 89
000 3385004
002 B40891303846
010 JOURNAL PAPER; EXPERIMENTAL.
100 COMPARATIVE STUDY BASED ON BOND COMPETITION CONSIDERATIONS OF THE
100 ELECTRONIC CONFIGURATION OF NICKEL(III) IN THE K/SUB 2/NIF/SUB
100 4/-TYPE OXIDES SR/SUB 0.50/LA/SUB 1.50/MG/SUB 0.50/NI/SUB 0.50/O/SUB
100 4/ AND SR/SUB 1.50/LA/SUB 0.50/TI/SUB 0.50/NI/SUB 0.50/O/SUB 4/.
200 ZHU LI MING; DEMAZEAU, G.; POUCHARD, M.; DANCE, J.M.; HAGENMULLER, P.
220 LAB. DE CHIMIE DU SOLIDE, BORDEAUX I UNIV., TALENCE, FRANCE
310 J. SOLID STATE CHEM. (USA)
330 JAN. 1989. VOL.78, NO.1, P.46-51, REF.19
350 ISSN 0022-4596, CODEN JSSCBI
400 TWO NEW K/SUB 2/NIF/SUB 4/-TYPE OXIDES SR/SUB 0.50/LA/SUB 1.50/NI/SUB
400 0.50/MG/SUB 0.50/O/SUB 4/ AND SR/SUB 1.50/LA/SUB 0.50/TI/SUB
400 0.50/NI/SUB 0.50/O/SUB 4/ HAVE BEEN PREPARED. X-RAY DIFFRACTION,
400 MAGNETIC MEASUREMENTS, AND EPR INVESTIGATIONS CHARACTERIZE A LOW-SPIN
400 CONFIGURATION IN THE OCTAHEDRAL SITES OF LOW SPIN NI(III) (T/SUB
400 2G//SUP 6/E/SUB G//SUP 1/). THE NATURE OF THE DISTORTION HAS BEEN
400 DETERMINED BY COMPARING THE G/SUB /// AND G/SUB PERPENDICULAR TO /
400 VALUES AT ROOM TEMPERATURE. WHILE A STRONG ELONGATION OF THE NIO/SUB
400 6/ OCTAHEDRA HAS BEEN OBSERVED FOR LA/SUB 2/LI/SUB 0.50/NI/SUB
400 0.50/O/SUB 4/, QUASI-REGULAR OCTAHEDRA CAN BE EXPECTED FOR SR/SUB
400 0.50/LA/SUB 1.50/MG/SUB 0.50/NI/SUB 0.50/O/SUB 4/ (G/SUB ///G/SUB
400 PERPENDICULAR TO /) AND COMPRESSED ONES SEEM TO OCCUR IN SR/SUB
400 1.50/LA/SUB 0.50/TI/SUB 0.50/NI/SUB 0.50/O/SUB 4/ (G/SUB /// MOD
400 >G/SUB PERPENDICULAR TO /). AN EXPLANATION OF THIS STRUCTURAL
400 EVOLUTION IS PROPOSED BASED ON BOND COMPETITION CONSIDERATIONS.
500 BONDS (CHEMICAL); G-FACTOR; LANTHANUM COMPOUNDS; PARAMAGNETIC
500 RESONANCE OF IRON GROUP IONS AND IMPURITIES; STRONTIUM COMPOUNDS;
500 X-RAY DIFFRACTION EXAMINATION OF MATERIALS.
510 ELECTRON PARAMAGNETIC RESONANCE; G-FACTORS; COMPRESSED OCTAHEDRA;
510 BOND COMPETITION; ELECTRONIC CONFIGURATION; K/SUB 2/NIF/SUB 4/-TYPE
510 OXIDES; X-RAY DIFFRACTION; EPR; LOW-SPIN CONFIGURATION; OCTAHEDRAL
510 SITES; LOW SPIN NI(III); DISTORTION; ROOM TEMPERATURE; ELONGATION;
510 NIO/SUB 6/ OCTAHEDRA; QUASI-REGULAR OCTAHEDRA; STRUCTURAL EVOLUTION;
510 20 DEGC; SR/SUB 0.50/LA/SUB 1.50/MG/SUB 0.50/NI/SUB 0.50/O/SUB 4/;
510 SR/SUB 1.50/LA/SUB 0.50/TI/SUB 0.50/NI/SUB 0.50/O/SUB 4/.
550 SR0.50LA1.50MG0.50NI0.50O4/SS LA1.50/SS MG0.50/SS NI0.50/SS SR0.50/SS
550 LA/SS MG/SS NI/SS O4/SS SR/SS O/SS; SR1.50LA0.50TI0.50NI0.50O4/SS
550 LA0.50/SS NI0.50/SS SR1.50/SS TI0.50/SS LA/SS NI/SS O4/SS SR/SS TI/SS
550 O/SS.
560 TEMPERATURE 2.93 E+02 K.
DOCUMENT= 1299
AUTH = KIMIZUKA
DT = 02
KN = B40891303852
LG = ENGL
SN = ISSN 0022-4596
YR = 89
000 3385010
002 B40891303852
010 JOURNAL PAPER; THEORETICAL, EXPERIMENTAL.
100 STRUCTURAL CLASSIFICATION OF RAO/SUB 3/(MO)/SUB N/ COMPOUNDS (R=SC,
100 IN, Y, OR LANTHANIDES; A=FE(III), GA, CR, OR AL; M=DIVALENT CATION;
100 N=1-11).
200 KIMIZUKA, N.; MOHRI, T.
220 NAT. INST. FOR RES. IN INORG. MATER., IBARAKI, JAPAN
310 J. SOLID STATE CHEM. (USA)
330 JAN. 1989. VOL.78, NO.1, P.98-107, REF.16
350 ISSN 0022-4596, CODEN JSSCBI
400 A SERIES OF NEW COMPOUNDS RAO/SUB 3/(MO)/SUB N/ (N=1-11) HAVING
400 SPINEL, YBFE/SUB 2/O/SUB 4/, OR INFEO/SUB 3/(ZNO)/SUB N/ TYPES OF
400 STRUCTURES WERE NEWLY SYNTHESIZED (R=SC, IN, Y, LU, YB, TM, OR ER;
400 A=FE(III), GA, CR, OR AL; M=MG, MN, FE(II), CO, NI, ZN, OR CD) AT
400 ELEVATED TEMPERATURES. THE CONDITIONS OF SYNTHESIS AND THE LATTICE
400 CONSTANTS FOR THESE COMPOUNDS ARE REPORTED. THE STACKING SEQUENCES OF
400 THE INO/SUB 1.5/, (FEZN)O/SUB 2.5/, AND ZNO LAYERS FOR INFEO/SUB
400 3/(ZNO)/SUB 10/ AND THE TMO/SUB 1.5/, (ALZN)O/SUB 2.5/, AND ZNO
400 LAYERS FOR TMALO/SUB 3/(ZNO)/SUB 11/ ARE PRESENTED, RESPECTIVELY. THE
400 CRYSTAL STRUCTURES OF THE (RAO/SUB 3/)/SUB M/(MO)/SUB N/ PHASES
400 (R=SC, IN, Y, OR LANTHANIDE ELEMENTS; A=FE(III), GA, CR, OR AL;
400 M=DIVALENT CATION ELEMENTS; M AND N=INTEGER) ARE CLASSIFIED INTO FOUR
400 CRYSTAL STRUCTURE TYPES (K/SUB 2/NIF/SUB 4/, CAFE/SUB 2/O/SUB 4/,
400 YBFE/SUB 2/O/SUB 4/, AND SPINEL), BASED UPON THE CONSTITUENT CATIONS
400 R, A, AND M.
500 CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS; LATTICE CONSTANTS.
510 STRUCTURAL CLASSIFICATION; SPINEL TYPE STRUCTURE; K/SUB 2/NIF/SUB 4/
510 TYPE STRUCTURE; YBFE/SUB 2/O/SUB 4/ TYPE STRUCTURE; INFEO/SUB
510 3/(ZNO)/SUB N/ TYPE STRUCTURE; CAFE/SUB 2/O/SUB 4/ TYPE STRUCTURE;
510 CONDITIONS; SYNTHESIS; LATTICE CONSTANTS; STACKING SEQUENCES; CRYSTAL
510 STRUCTURES; CRYSTAL STRUCTURE TYPES.
DOCUMENT= 1300
AUTH = SHIBA
DT = 06
KN = B40891303938
LG = ENGL
SN = ISSN 0304-8853
YR = 88
000 3385096
002 B40891303938
010 CONFERENCE PAPER; THEORETICAL.
100 NUMERICAL STUDIES OF THE GROUND STATE OF STRONGLY CORRELATED ELECTRON
100 SYSTEMS (HIGH T/SUB C/ SUPERCONDUCTOR MECHANISM).
200 SHIBA, H.; OGATA, M.
220 INST. FOR SOLID STATE PHYS., TOKYO UNIV., JAPAN
300 6TH INTERNATIONAL CONFERENCE ON CRYSTAL-FIELD EFFECTS AND
300 HEAVY-FERMION PHYSICS.
305 FRANKFURT, WEST GERMANY. 18-21 JULY 1988.
310 J. MAGN. MAGN. MATER. (NETHERLANDS)
330 2 DEC. 1988. VOL.76-77, P.59-64, REF.19
350 ISSN 0304-8853, CODEN JMMMDC
400 THE GROUND STATE OF TWO-DIMENSIONAL CUO/SUB 2/ MODELS, A CLASS OF
400 STRONGLY CORRELATED ELECTRON SYSTEMS, IS STUDIED TO EXTRACT A PAIRING
400 MECHANISM FOR HIGH-T/SUB C/ SUPERCONDUCTIVITY. DETAILED EXAMINATIONS
400 ARE MADE ON HOW AND IN WHAT SITUATION AN ATTRACTIVE INTERACTION
400 BETWEEN TWO DOPED HOLES ARISES.
500 COOPER PAIRS; HIGH-TEMPERATURE SUPERCONDUCTORS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; GROUND STATE; STRONGLY CORRELATED
510 ELECTRON SYSTEMS; TWO-DIMENSIONAL CUO/SUB 2/ MODELS; PAIRING
510 MECHANISM; HIGH-T/SUB C/ SUPERCONDUCTIVITY; ATTRACTIVE INTERACTION;
510 DOPED HOLES.
550 CU/SS O/SS.
DOCUMENT= 1301
AUTH = ROHLER
DT = 06
KN = B40891304012
LG = ENGL
SN = ISSN 0304-8853
YR = 88
000 3385170
002 B40891304012
010 CONFERENCE PAPER; EXPERIMENTAL.
100 THE VALENCE OF CERIUM IN CECU/SUB 2/SI/SUB 2/ UNDER HIGH PRESSURE.
200 ROHLER, J.; KLUG, J.; KEULERZ, K.
220 II. PHYS. INST., KOLN UNIV., WEST GERMANY
300 6TH INTERNATIONAL CONFERENCE ON CRYSTAL-FIELD EFFECTS AND
300 HEAVY-FERMION PHYSICS.
305 FRANKFURT, WEST GERMANY. 18-21 JULY 1988.
310 J. MAGN. MAGN. MATER. (NETHERLANDS)
330 2 DEC. 1988. VOL.76-77, P.340-2, REF.11
350 ISSN 0304-8853, CODEN JMMMDC
400 THE AUTHORS HAVE MEASURED THE FRACTIONAL VALENCE ( UPSILON =3+ NU )
400 OF CE IN CECU/SUB 2/SI/SUB 2/ (NONSUPERCONDUCTING AT AMBIENT
400 PRESSURE) AT PRESSURES UP TO 200 KBAR (300 K) THROUGH L/SUB III/
400 X-RAY ABSORPTION. UPSILON INCREASES WITH INCREASING PRESSURE FROM
400 3.06 (0 KBAR) TO 3.38 (150 KBAR) AND THEN SATURATES. AT 38 KBAR THE
400 AUTHORS HAVE OBSERVED A FIRST ORDER VALENCE TRANSITION BY 0.04 FROM
400 UPSILON =3.10 TO 3.14. A SUPERCONDUCTING REFERENCE SAMPLE AT AMBIENT
400 PRESSURE EXHIBITS UPSILON =3.11.
500 CERIUM ALLOYS; COPPER ALLOYS; HEAVY FERMION SUPERCONDUCTORS;
500 HIGH-PRESSURE SOLID-STATE PHASE TRANSFORMATIONS; MIXED VALENCE
500 COMPOUNDS; SILICON ALLOYS; X-RAY ABSORPTION SPECTRA.
510 HEAVY FERMION SUPERCONDUCTOR; MIXED VALENCE COMPOUND; HIGH PRESSURE;
510 FRACTIONAL VALENCE; L/SUB III/ X-RAY ABSORPTION; FIRST ORDER VALENCE
510 TRANSITION; 0 TO 200 KBAR; 300 K; CECU/SUB 2/SI/SUB 2/.
550 CECU2SI2/SS CU2/SS SI2/SS CE/SS CU/SS SI/SS.
560 PRESSURE 0.0 E+00 TO 2.0 E+10 PA; TEMPERATURE 3.0 E+02 K.
DOCUMENT= 1302
AUTH = MAKI
DT = 06
KN = B40891304037
LG = ENGL
SN = ISSN 0304-8853
YR = 88
000 3385195
002 B40891304037
010 CONFERENCE PAPER; THEORETICAL.
100 MODELS OF HEAVY FERMION SUPERCONDUCTORS: IMPURITY SCATTERING EFFECT.
200 MAKI, K.; XIAOZHOU HUANG
220 DEPT. OF PHYS., UNIV. OF SOUTHERN CALIFORNIA, LOS ANGELES, CA, USA
300 6TH INTERNATIONAL CONFERENCE ON CRYSTAL-FIELD EFFECTS AND
300 HEAVY-FERMION PHYSICS.
305 FRANKFURT, WEST GERMANY. 18-21 JULY 1988.
310 J. MAGN. MAGN. MATER. (NETHERLANDS)
330 2 DEC. 1988. VOL.76-77, P.499-403, REF.19
350 ISSN 0304-8853, CODEN JMMMDC
400 THE AUTHORS CONSIDER AN ANISOTROPIC SUPERCONDUCTOR IN THE PRESENCE OF
400 RESONANCE SCATTERING DUE TO IMPURITIES. FOR A CONVENTIONAL
400 SUPERCONDUCTOR THE GAP EQUATION IS SIMILAR TO THE ONE FOR THE TWO
400 BAND MODEL WITH RESONANCE SCATTERING. IT IS SHOWN THAT A CONVENTIONAL
400 SUPERCONDUCTOR WITH LARGE ANISOTROPY IS COMPATIBLE WITH RECENT
400 EXPERIMENT ON U/SUB 1-X/TH/SUB X/BE/SUB 13/ AND CE/SUB 1-X/M/SUB
400 X/CU/SUB 2.2/SI/SUB 2/. HOWEVER, SINCE THE JUMP IN THE SPECIFIC HEAT
400 FOR AN ANISOTROPIC SUPERCONDUCTOR IS MUCH REDUCED FROM THE BCS VALUE
400 IN THE WEAK COUPLING THEORY, THIS INDICATES NECESSITY OF THE STRONG
400 COUPLING THEORY.
500 HEAVY FERMION SUPERCONDUCTORS; IMPURITIES; SPECIFIC HEAT OF SOLIDS;
500 STRONG-COUPLING SUPERCONDUCTORS.
510 SPECIFIC HEAT JUMP; HEAVY FERMION SUPERCONDUCTORS; IMPURITY
510 SCATTERING EFFECT; ANISOTROPIC SUPERCONDUCTOR; RESONANCE SCATTERING;
510 CONVENTIONAL SUPERCONDUCTOR; GAP EQUATION; WEAK COUPLING THEORY;
510 STRONG COUPLING THEORY; U/SUB 1-X/TH/SUB X/BE/SUB 13/; CE/SUB
510 1-X/CU/SUB 2.2/SI/SUB 2/.
550 CECU2.2SI2/SS CU2.2/SS SI2/SS CE/SS CU/SS SI/SS; UTHBE13/SS BE13/SS
550 BE/SS TH/SS U/SS.
DOCUMENT= 1303
AUTH = NAKAMURA
DT = 06
KN = B40891304043
LG = ENGL
SN = ISSN 0304-8853
YR = 88
000 3385201
002 B40891304043
010 CONFERENCE PAPER; EXPERIMENTAL.
100 DISCOVERY OF ANTIFERROMAGNETIC ORDERING ABOVE UPPER CRITICAL FIELD IN
100 THE HEAVY FERMION SUPERCONDUCTOR CECU/SUB 2/SI/SUB 2/.
200 NAKAMURA, H.; KITAOKA, Y.; YAMADA, H.; ASAYAMA, K.
220 DEPT. OF MATER. PHYS., OSAKA UNIV., JAPAN
300 6TH INTERNATIONAL CONFERENCE ON CRYSTAL-FIELD EFFECTS AND
300 HEAVY-FERMION PHYSICS.
305 FRANKFURT, WEST GERMANY. 18-21 JULY 1988.
310 J. MAGN. MAGN. MATER. (NETHERLANDS)
330 2 DEC. 1988. VOL.76-77, P.517-19, REF.11
350 ISSN 0304-8853, CODEN JMMMDC
400 THE MAGNETIC PROPERTIES OF CECU/SUB 2/SI/SUB 2/ HAVE BEEN
400 INVESTIGATED BY /SUP 63/CU NUCLEAR MAGNETIC RESONANCE (NMR). A
400 SPIN-DENSITY-WAVE-LIKE ORDERING HAS BEEN FOUND BELOW 0.6 K FOR
400 SUPERCONDUCTING CECU/SUB 2.02/SI/SUB 2/ WITH T/SUB C/=0.72 K BY
400 APPLYING THE EXTERNAL MAGNETIC FIELD. THIS TYPE OF MAGNETIC ORDERING
400 HAS NOT BEEN OBSERVED FOR NON-SUPERCONDUCTING CECU/SUB 1.9/SI/SUB 2/
400 WITH A SPIN-GLASS TRANSITION AT T/SUB G/=2.5 K, INDICATING A STRONG
400 CORRELATION WITH THE SUPERCONDUCTIVITY.
500 ANTIFERROMAGNETIC PROPERTIES OF SUBSTANCES; CERIUM ALLOYS; COPPER
500 ALLOYS; HEAVY FERMION SUPERCONDUCTORS; MAGNETIC SUPERCONDUCTORS;
500 MAGNETIC TRANSITIONS; NUCLEAR MAGNETIC RESONANCE; SILICON ALLOYS;
500 SPIN DENSITY WAVES; SUPERCONDUCTING CRITICAL FIELD.
510 NMR; SDW; ANTIFERROMAGNETIC ORDERING; UPPER CRITICAL FIELD; HEAVY
510 FERMION SUPERCONDUCTOR; MAGNETIC PROPERTIES; /SUP 63/CU NUCLEAR
510 MAGNETIC RESONANCE; SPIN-DENSITY-WAVE-LIKE ORDERING; EXTERNAL
510 MAGNETIC FIELD; 0.6 TO 0.72 K; CECU/SUB 2/SI/SUB 2/.
550 CECU2SI2/SS CU2/SS SI2/SS CE/SS CU/SS SI/SS.
560 TEMPERATURE 6.0 E-01 TO 7.2 E-01 K.
DOCUMENT= 1304
AUTH = AHLHEIM
DT = 06
KN = B40891304044
LG = ENGL
SN = ISSN 0304-8853
YR = 88
000 3385202
002 B40891304044
010 CONFERENCE PAPER; EXPERIMENTAL.
100 PAIR BREAKING IN THE HEAVY-FERMION SUPERCONDUCTORS CE/SUB 1-X/M/SUB
100 X/CU/SUB 2.2/SI/SUB 2/ AND U/SUB 1-X/M/SUB X/BE/SUB 13/ (M:TH,LA, Y
100 AND GD).
200 AHLHEIM, U.; WINKELMANN, M.; VAN AKEN, P.; BREDL, C.D.; STEGLICH, F.
200 / STEWART, G.R.
220 INST. FUR FESTKORPERPHYS. TECH. HOCHSCHULE DARMSTADT, WEST GERMANY
300 6TH INTERNATIONAL CONFERENCE ON CRYSTAL-FIELD EFFECTS AND
300 HEAVY-FERMION PHYSICS.
305 FRANKFURT, WEST GERMANY. 18-21 JULY 1988.
310 J. MAGN. MAGN. MATER. (NETHERLANDS)
330 2 DEC. 1988. VOL.76-77, P.520-2, REF.12
350 ISSN 0304-8853, CODEN JMMMDC
400 THE AUTHORS REPORT MEASUREMENTS OF T/SUB C/ AND DELTA C FOR CE/SUB
400 1-X/M/SUB X/CU/SUB 2.2/SI/SUB 2/ (M=LA, Y, GD) AND U/SUB 1-X/M/SUB
400 X/BE/SUB 13/ (M:TH, LA, Y). 'DIAMAGNETIC' PAIR BREAKING BY
400 NONMAGNETIC DOPANTS IS OBSERVED WHICH IMPLIES AN ANISOTROPIC NATURE
400 OF BOTH THE SUPERCONDUCTING ORDER PARAMETER AND THE
400 IMPURITY-SCATTERING MECHANISM. GD IMPURITIES IN CECU/SUB 2.2/SI/SUB
400 2/ GIVE RISE TO ADDITIONAL 'PARAMAGNETIC' PAIR BREAKING.
500 BERYLLIUM ALLOYS; CERIUM ALLOYS; COPPER ALLOYS; DIAMAGNETIC
500 PROPERTIES OF SUBSTANCES; HEAVY FERMION SUPERCONDUCTORS; IMPURITIES;
500 PARAMAGNETIC PROPERTIES OF SUBSTANCES; SILICON ALLOYS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; URANIUM ALLOYS.
510 PAIR BREAKING; TRANSITION TEMPERATURE; DIAMAGNETIC PAIR BREAKING;
510 HEAVY-FERMION SUPERCONDUCTORS; NONMAGNETIC DOPANTS; SUPERCONDUCTING
510 ORDER PARAMETER; IMPURITY-SCATTERING MECHANISM; GD IMPURITIES; CE/SUB
510 1-X/LA/SUB X/CU/SUB 2.2/SI/SUB 2/; CE/SUB 1-X/Y/SUB X/CU/SUB
510 2.2/SI/SUB 2/; CE/SUB 1-X/GD/SUB X/CU/SUB 2.2/SI/SUB 2/; U/SUB
510 1-X/TH/SUB X/BE/SUB 13/; U/SUB 1-X/LA/SUB X/BE/SUB 13/; U/SUB
510 1-X/Y/SUB X/BE/SUB 13/.
550 CELACU2.2SI2/SS CU2.2/SS SI2/SS CE/SS CU/SS LA/SS SI/SS;
550 CEYCU2.2SI2/SS CU2.2/SS SI2/SS CE/SS CU/SS SI/SS Y/SS;
550 CEGDCU2.2SI2/SS CU2.2/SS SI2/SS CE/SS CU/SS GD/SS SI/SS; UTHBE13/SS
550 BE13/SS BE/SS TH/SS U/SS; ULABE13/SS BE13/SS BE/SS LA/SS U/SS;
550 UYBE13/SS BE13/SS BE/SS U/SS Y/SS.
DOCUMENT= 1305
AUTH = KITAOKA
DT = 06
KN = B40891304047
LG = ENGL
SN = ISSN 0304-8853
YR = 88
000 3385205
002 B40891304047
010 CONFERENCE PAPER; THEORETICAL.
100 SUPERCONDUCTIVITY IN HEAVY FERMIONS AND HIGH T/SUB C/ OXIDES:
100 SIMILARITY AND DISSIMILARITY.
200 KITAOKA, Y.; ISHIDA, K.; FUJIWARA, K.; KONDO, T.; ASAYAMA, K. /
200 KATAYAMA-YOSHIDA, H.; OKABE, Y.; TAKAHASHI, T.
220 DEPT. OF MATER. PHYS., OSAKA UNIV., JAPAN
300 6TH INTERNATIONAL CONFERENCE ON CRYSTAL-FIELD EFFECTS AND
300 HEAVY-FERMION PHYSICS.
305 FRANKFURT, WEST GERMANY. 18-21 JULY 1988.
310 J. MAGN. MAGN. MATER. (NETHERLANDS)
330 2 DEC. 1988. VOL.76-77, P.527-9, REF.22
350 ISSN 0304-8853, CODEN JMMMDC
400 IT HAS BEEN FOUND THAT THE NUCLEAR RELAXATION RATE 1/T/SUB 1/ OF CU
400 IN THE CUO/SUB 2/ PLANE OF HIGH-T/SUB C/ OXIDES IS DOMINATED BY THE
400 ANTIFERROMAGNETIC SPIN FLUCTUATION AMONG NEARLY LOCALIZED D-HOLES,
400 WHILE 1/T/SUB 1/ OF /SUP 17/O ENRICHED IN THE HIGH-T/SUB C/ OXIDES IS
400 SIMILAR TO THAT FOR THE CONVENTIONAL SUPERCONDUCTOR, MANIFESTING A
400 DISTINCT ENHANCEMENT JUST BELOW T/SUB C/. IT IS POINTED OUT THAT THE
400 SUPERCONDUCTING PROPERTY POSSESS DIFFERENT CHARACTER IN THE HEAVY
400 FERMION AND THE HIGH T/SUB C/ COMPOUNDS.
500 ANTIFERROMAGNETISM; HEAVY FERMION SUPERCONDUCTORS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; NUCLEAR SPIN-LATTICE RELAXATION; SPIN DYNAMICS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTOR; TRANSITION TEMPERATURE; HEAVY
510 FERMIONS; HIGH T/SUB C/ OXIDES; NUCLEAR RELAXATION RATE; CUO/SUB 2/
510 PLANE; ANTIFERROMAGNETIC SPIN FLUCTUATION; NEARLY LOCALIZED D-HOLES.
550 CU/SS O/SS.
DOCUMENT= 1306
AUTH = SPILLE
DT = 06
KN = B40891304050
LG = ENGL
SN = ISSN 0304-8853
YR = 88
000 3385208
002 B40891304050
010 CONFERENCE PAPER; EXPERIMENTAL.
100 COEXISTENCE OF SPIN-GLASS FREEZING AND HEAVY-FERMION
100 SUPERCONDUCTIVITY IN CE/SUB 1-X/GD/SUB X/CU/SUB 2.2/SE/SUB 2/.
200 SPILLE, H.; WINKELMANN, M.; AHLHEIM, U.; BREDL, C.D.; STEGLICH, F. /
200 HAEN, P.; MIGNOT, J.M.; THOLENCE, J.L.; TOURNIER, R.
220 INST. FUR FESTKORPERPHYS., DARMSTADT, WEST GERMANY
300 6TH INTERNATIONAL CONFERENCE ON CRYSTAL-FIELD EFFECTS AND
300 HEAVY-FERMION PHYSICS.
305 FRANKFURT, WEST GERMANY. 18-21 JULY 1988.
310 J. MAGN. MAGN. MATER. (NETHERLANDS)
330 2 DEC. 1988. VOL.76-77, P.539-41, REF.11
350 ISSN 0304-8853, CODEN JMMMDC
400 IN CE/SUB 1-X/GD/SUB X/CU/SUB 2.2/SI/SUB 2/ SPIN-GLASS ORDERING
400 COEXISTS WITH SUPERCONDUCTIVITY BELOW THE 'CRITICAL' (T/SUB C/ TO 0)
400 CONCENTRATION X/SUB CR/=5.1 AT.%. FOR SAMPLES WITH SLIGHTLY LOWER GD
400 CONTENT, A SMALL VOLUME FRACTION OF APPROXIMATELY=10% REMAINS
400 SUPERCONDUCTING PRESUMABLY DUE TO DEMAGNETIZING EFFECTS. THUS, THE
400 FULL T/SUB C/(X) DEPENDENCE IS ACCESSIBLE. IT CLOSELY FOLLOWS THE
400 AG-RESULT AND PROVES THE EXISTENCE OF A 'PARAMAGNETIC' PAIR-BREAKING
400 MECHANISM.
500 CERIUM COMPOUNDS; COOPER PAIRS; GADOLINIUM COMPOUNDS; HEAVY FERMION
500 SUPERCONDUCTORS; SPIN GLASSES.
510 HEAVY FERMION SYSTEMS; COOPER PAIRS; SPIN-GLASS ORDERING;
510 SUPERCONDUCTIVITY; DEMAGNETIZING EFFECTS; PAIR-BREAKING MECHANISM;
510 CE/SUB 1-X/GD/SUB X/CU/SUB 2.2/SE/SUB 2/.
550 CEGDCU2.2SE2/SS CU2.2/SS SE2/SS CE/SS CU/SS GD/SS SE/SS.
DOCUMENT= 1307
AUTH = HAUCK
DT = 06
KN = B40891304058
LG = ENGL
NF = MGU6124
SN = ISSN 0304-8853
YR = 88
000 3385216
002 B40891304058
010 CONFERENCE PAPER; EXPERIMENTAL.
100 PHASE RELATIONS AND PHYSICAL PROPERTIES OF TERNARY AND QUATERNARY
100 OXIDES WITH FCC DERIVATIVE METAL LATTICE.
200 HAUCK, J.; BICKMANN, K.; BISCHOF, B.; HENKEL, D.; FREIBURG, C.;
200 KOBLER, U.; MIKA, K.; REICHERT, W.; WURTZ, E.M. / IPTA, S.;
200 ALTENBURG, H.
220 IFF, KFA, JULICH, WEST GERMANY
300 6TH INTERNATIONAL CONFERENCE ON CRYSTAL-FIELD EFFECTS AND
300 HEAVY-FERMION PHYSICS.
305 FRANKFURT, WEST GERMANY. 18-21 JULY 1988.
310 J. MAGN. MAGN. MATER. (NETHERLANDS)
330 2 DEC. 1988. VOL.76-77, P.651-2, REF.6
350 ISSN 0304-8853, CODEN JMMMDC
400 THE NONMETALLIC OXIDES LI/SUB 2/CUO/SUB 2/, MGCU/SUB 2/O/SUB 3/,
400 CACU/SUB 2/O/SUB 3/, NA/SUB 4/UO/SUB 5/ AND LI/SUB 5/REO/SUB 6/
400 PDH/SUB 0.8/ ARE ISOMORPHOUS TO SUPERCONDUCTING TIO, AND NB/SUB
400 6/C/SUB 5/ WITH NACL DERIVATIVE STRUCTURE. THE CONDUCTIVITY CAN BE
400 INCREASED IN THE LI/SUB 2/CUO/SUB 2/-CACU/SUB 2/O/SUB 3/ SYSTEM BY
400 FORMING OF THE NEW COMPOUND LI/SUB 2/CACU/SUB 3/O/SUB 5+X/.
500 CALCIUM COMPOUNDS; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE
500 SEMICONDUCTORS AND INSULATORS; LITHIUM COMPOUNDS; MAGNESIUM
500 COMPOUNDS; PHASE DIAGRAMS; SODIUM COMPOUNDS.
510 PHASE RELATIONS; ISOMORPHOUS MATERIALS; CONDUCTIVITY; LI/SUB
510 2/CUO/SUB 2/; MGCU/SUB 2/O/SUB 3/; CACU/SUB 2/O/SUB 3/; NA/SUB
510 4/UO/SUB 5/; LI/SUB 5/REO/SUB 6/; PDH/SUB 0.8/; NB/SUB 6/C/SUB 5/;
510 TIO.
550 TIO/BIN TI/BIN O/BIN; LI2CUO2/SS LI2/SS CU/SS LI/SS O2/SS O/SS;
550 MGCU2O3/SS CU2/SS CU/SS MG/SS O3/SS O/SS; CACU2O3/SS CU2/SS CA/SS
550 CU/SS O3/SS O/SS; NA4UO5/SS NA4/SS NA/SS O5/SS O/SS U/SS; LI5REO6/SS
550 LI5/SS LI/SS O6/SS RE/SS O/SS; PDH0.8/BIN H0.8/BIN PD/BIN H/BIN;
550 NB6C5/BIN NB6/BIN C5/BIN NB/BIN C/BIN.
DOCUMENT= 1308
DT = 05
KN = B40891304095
LG = ENGL
SN = ISSN 0449-1947
YR = 88
000 3385253
002 B40891304095
010 CONFERENCE PROCEEDINGS.
100 35TH INTERNATIONAL FIELD EMISSION SYMPOSIUM.
300 35TH INTERNATIONAL FIELD EMISSION SYMPOSIUM.
305 OAK RIDGE, TN, USA. 18-22 JULY 1988. US DOE. PHILIPS ELECTRON.
305 INSTRUM.. ET AL.
310 J. PHYS. COLLOQ. (FRANCE)
330 NOV. 1988. VOL.49, NO.C-6
350 ISSN 0449-1947, CODEN JPQCAK
400 THE FOLLOWING TOPICS WERE DEALT WITH: FIELD EMISSION, FIELD ION, AND
400 ATOM PROBE FIELD ION MICROSCOPY INSTRUMENTATION, TECHNIQUES AND
400 DETERMINATIONS; ELECTRON FIELD EMISSION; FIELD EVAPORATION; FIELD
400 EMITTER ARRAYS; LIQUID METAL ION SOURCES; FIELD ADSORPTION AND
400 DISSOCIATION; SURFACE DIFFUSION; STATISTICAL ANALYSIS OF ATOM PROBE
400 DATA; HIGH TEMPERATURE SUPERCONDUCTOR INVESTIGATIONS; SEMICONDUCTOR
400 INVESTIGATIONS. ABSTRACTS OF INDIVIDUAL PAPERS CAN BE FOUND UNDER THE
400 RELEVANT CLASSIFICATION CODES IN THIS OR OTHER ISSUES.
500 ADSORPTION; ATOM PROBE FIELD ION MICROSCOPY; DESORPTION;
500 DISSOCIATION; ELECTRON FIELD EMISSION; ELECTRON SOURCES; FIELD
500 EMISSION ELECTRON MICROSCOPES; FIELD EMISSION ELECTRON MICROSCOPY;
500 FIELD EMISSION ION MICROSCOPES; FIELD EMISSION ION MICROSCOPY; FIELD
500 EVAPORATION; FIELD ION EMISSION; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 ION SOURCES; STATISTICAL ANALYSIS; SURFACE DIFFUSION; SURFACE
500 STRUCTURE.
510 APFIM; FEM; FIM; ELECTRON FIELD EMISSION; FIELD ION EMISSION; SURFACE
510 STRUCTURE; LMIS; FIELD DISSOCIATION; FIELD DESORPTION; ION SOURCES;
510 ELECTRON SOURCES; ATOM PROBE FIELD ION MICROSCOPY; FIELD EVAPORATION;
510 FIELD EMITTER ARRAYS; LIQUID METAL ION SOURCES; FIELD ADSORPTION;
510 SURFACE DIFFUSION; STATISTICAL ANALYSIS; ATOM PROBE DATA.
DOCUMENT= 1309
AUTH = CEREZO
DT = 06
KN = B40891304100
LG = ENGL
SN = ISSN 0449-1947
YR = 88
000 3385258
002 B40891304100
010 CONFERENCE PAPER; EXPERIMENTAL.
100 DEVELOPMENT AND INITIAL APPLICATIONS OF A POSITION-SENSITIVE ATOM
100 PROBE.
200 CEREZO, A.; GODFREY, T.J.; SMITH, G.D.W.
220 DEPT. OF METALL. ? SCI. OF MATER., OXFORD UNIV., UK
300 35TH INTERNATIONAL FIELD EMISSION SYMPOSIUM.
305 OAK RIDGE, TN, USA. 18-22 JULY 1988. US DOE. PHILIPS ELECTRON.
305 INSTRUM.. ET AL.
310 J. PHYS. COLLOQ. (FRANCE)
330 NOV. 1988. VOL.49, NO.C-6, P.25-30, REF.21
350 ISSN 0449-1947, CODEN JPQCAK
400 A POSITION-SENSITIVE DETECTOR SYSTEM HAS BEEN COMBINED WITH A SHORT
400 FLIGHT-PATH ATOM PROBE TO YIELD AN INSTRUMENT OF LARGE COLLECTION
400 ANGLE WHICH IDENTIFIES BOTH THE CHEMICAL NATURE AND POSITION OF FIELD
400 EVAPORATED IONS. THIS ALLOWS THE DISTRIBUTION OF ALL ELEMENTS TO BE
400 MAPPED OUT SIMULTANEOUSLY AND, WITH DEPTH PROFILING, PERMITS
400 THREE-DIMENSIONAL RECONSTRUCTION OF THE ORIGINAL COMPOSITIONAL
400 VARIATIONS. APPLICATIONS OF THE TECHNIQUE TO THE STUDY OF ORDERING,
400 FINE-SCALE PRECIPITATION AND SPINODAL DECOMPOSITION IN METALLIC
400 SPECIMENS ARE DESCRIBED, TOGETHER WITH EXAMPLES OF THE ANALYSIS OF
400 SURFACE FILMS IN CERAMIC OXIDE SUPERCONDUCTORS, AND INTERFACES IN
400 SEMICONDUCTOR MATERIALS.
500 ATOM PROBE FIELD ION MICROSCOPY; FIELD EVAPORATION; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; SURFACE STRUCTURE.
510 HIGH TEMPERATURE SUPERCONDUCTOR; APFIM; TIME OF FLIGHT MASS
510 SPECTROMETER; SEMICONDUCTOR JUNCTIONS; FIELD EVAPORATION;
510 POSITION-SENSITIVE ATOM PROBE; SHORT FLIGHT-PATH ATOM PROBE; LARGE
510 COLLECTION ANGLE; DEPTH PROFILING; COMPOSITIONAL VARIATIONS;
510 ORDERING; FINE-SCALE PRECIPITATION; SPINODAL DECOMPOSITION; SURFACE
510 FILMS; CERAMIC OXIDE SUPERCONDUCTORS; Y-BA-CU-O.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1310
AUTH = SZETO
DT = 02
KN = B40891304679
LG = ENGL
SN = ISSN 0217-9792
YR = 89
000 3385837
002 B40891304679
010 JOURNAL PAPER; THEORETICAL.
100 MAGNETIC PAIRING IN TWO-DIMENSIONAL ANTIFERROMAGNETIC XY MODEL.
200 SZETO, K.Y.
220 DEPT. OF PHYS., YORK UNIV., TORONOTO, ONT., CANADA
310 INT. J. MOD. PHYS. B (SINGAPORE)
330 JAN. 1989. VOL.3, NO.1, P.65-76, REF.22
350 ISSN 0217-9792, CODEN IJPBEV
400 A TWO-DIMENSIONAL ISING COULOMB GAS IS INTRODUCED TO DESCRIBE THE
400 FRUSTRATED PLAQUETTES OF THE TWO-DIMENSIONAL ANTIFERROMAGNETIC XY
400 MODEL WITH COULOMB REPULSION. THE ISING SPIN VARIABLE CORRESPONDS TO
400 THE TWO POSSIBLE CHIRALITIES OF THE FRUSTRATED PLAQUETTES, WHICH
400 REPEL EACH OTHER WITH A SCREENED COULOMB POTENTIAL. USING THE
400 SELF-CONSISTENT SCREENING ANALYSIS, THE ISING COULOMB GAS IS SHOWN TO
400 HAVE A KOSTERLITZ-THOULESS TRANSITION FROM A PAIRING PHASE AT LOW
400 TEMPERATURE TO A PLASMA PHASE AT HIGH TEMPERATURE. THE PHASE DIAGRAM
400 IS OBTAINED NUMERICALLY AS A FUNCTION OF DENSITY AND RELATIVE
400 STRENGTH OF THE ATTRACTION BETWEEN PARTICLES OF OPPOSITE CHIRALITIES
400 AND THE COULOMB REPULSION. POSSIBLE APPLICATIONS TO THE MAGNETIC
400 PAIRING MECHANISM OF HIGH TEMPERATURE SUPERCONDUCTORS IS DISCUSSED IN
400 THE CONTEXT OF LI DOPED LA/SUB 2/CUO/SUB 4/. IT IS ALSO ARGUED THAT
400 THE AHARONY ET AL. (1988) MODEL OF MAGNETIC PAIRING WITH THE DIPOLAR
400 ATTRACTION CAN BE DERIVED AS A SPECIAL CASE OF THE ISING COULOMB GAS
400 MODEL AND IS SUPERCEDED BY A STRONGER ATTRACTIVE INTERACTION IN
400 MAGNETIC PAIRING MECHANISM IN THE SELF-CONSISTENT ANALYSIS.
500 ANTIFERROMAGNETISM; HIGH-TEMPERATURE SUPERCONDUCTORS; ISING MODEL;
500 LANTHANUM COMPOUNDS; LITHIUM; X-Y MODEL.
510 TWO-DIMENSIONAL ANTIFERROMAGNETIC XY MODEL; ISING COULOMB GAS;
510 FRUSTRATED PLAQUETTES; COULOMB REPULSION; CHIRALITIES;
510 SELF-CONSISTENT SCREENING ANALYSIS; KOSTERLITZ-THOULESS TRANSITION;
510 PLASMA PHASE; PHASE DIAGRAM; DENSITY; RELATIVE STRENGTH; HIGH
510 TEMPERATURE SUPERCONDUCTORS; DIPOLAR ATTRACTION; SELF-CONSISTENT
510 ANALYSIS; LA/SUB 2/CUO/SUB 4/:LI.
550 LA2CUO4:LI/SS LA2CUO4/SS LA2/SS CU/SS LA/SS LI/SS O4/SS O/SS LI/EL
550 LI/DOP.
DOCUMENT= 1311
AUTH = TANNER
DT = 02
KN = B40891304683
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385841
002 B40891304683
010 JOURNAL PAPER; REVIEW.
100 AN INFRARED VIEW OF HIGH T/SUB C/ SUPERCONDUCTORS.
200 TANNER, D.B. / TIMUSK, T.
220 DEPT. OF PHYS., FLORIDA UNIV., GAINESVILLE, FL, USA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 MARCH 1989. VOL.3, NO.3, P.189-94, REF.20
350 ISSN 0217-9849
400 STUDIES OF THE INFRARED PROPERTIES OF THE HIGH T/SUB C/
400 SUPERCONDUCTORS ARE REVIEWED, WITH PARTICULAR EMPHASIS ON ATTEMPTS TO
400 DETERMINE THE ENERGY GAP BY FAR INFRARED SPECTROSCOPY AND ON THE
400 PROPERTIES OF THE STRONG ABSORPTION THAT OCCURS IN THE MID INFRARED.
400 THE AUTHORS ARGUE THAT THIS MID-INFRARED ABSORPTION IS A DIRECT
400 PARTICLE-HOLE EXCITATION RATHER THAN A HOLSTEIN EMISSION PROCESS. IN
400 ADDITION, THEY CONCLUDE THAT ALTHOUGH THE ENERGY GAP IS NOT EASILY
400 OBSERVED, SEVERAL RECENT EXPERIMENTS PLACE IT IN THE WEAK TO MODERATE
400 STRONG COUPLING RANGE.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; INFRARED SPECTRA OF INORGANIC
500 SOLIDS; REVIEWS; SUPERCONDUCTING ENERGY GAP.
510 HIGH TEMPERATURE SUPERCONDUCTOR; HIGH T/SUB C/ SUPERCONDUCTORS;
510 INFRARED PROPERTIES; ENERGY GAP; FAR INFRARED SPECTROSCOPY; DIRECT
510 PARTICLE-HOLE EXCITATION; HOLSTEIN EMISSION PROCESS; STRONG COUPLING.
DOCUMENT= 1312
AUTH = SIEGRIST
DT = 02
KN = B40891304684
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385842
002 B40891304684
010 JOURNAL PAPER; THEORETICAL.
100 THERMAL VIBRATIONS IN BA/SUB 2/YCU/SUB 3/O/SUB 7/ STUDIED BY X-RAY
100 DIFFRACTION.
200 SIEGRIST, T.; MARSH, P.
220 AT?T BELL LABS., MURRAY HILL, NJ, USA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 MARCH 1989. VOL.3, NO.3, P.195-9, REF.15
350 ISSN 0217-9849
400 THE STUDY OF THE THERMAL MOTION OF THE INDIVIDUAL ATOMS IN THE
400 HIGH-T/SUB C/ OXIDE SUPERCONDUCTOR BA/SUB 2/YCU/SUB 3/O/SUB 7/ IS OF
400 PROFOUND INTEREST SINCE CLUES CAN BE OBTAINED ON THE POSSIBLE
400 ELECTRON-PHONON INTERACTION AND ANOMALIES IN THE CRYSTAL POTENTIAL
400 CAN BE DETECTED. SINCE X-RAYS ARE SCATTERED BY ELECTRONS IN THE
400 CRYSTAL, IT IS POSSIBLE TO MAP OUT THE TIME AVERAGED ELECTRON
400 DENSITY, AND MEAN SQUARE DISPLACEMENT VALUES FOR INDIVIDUAL ATOMS
400 DECONVOLVED ALONG PRINCIPLE AXES CAN BE OBTAINED. THE THERMAL
400 PARAMETERS, E.G. THE DEBYE WALLER FACTORS THAN DESCRIBE THE
400 PROBABILITY OF FINDING A PARTICULAR ATOM AT A GIVEN DISPLACEMENT.
400 ACCURATE DEBYE-WALLER FACTORS THEREFORE CAN SERVE TO TEST LATTICE
400 DYNAMICS CALCULATIONS AND HELP IN THE INTERPRETATION OF OPTICAL DATA
400 SUCH AS RAMAN SPECTRA. TO ACCOUNT FOR THE WAVELENGTH DEPENDENCE OF
400 ABSORPTION AND EXTINCTION, TWO COMPLETE EWALD SPHERES AT TWO
400 WAVELENGTHS WERE PREVIOUSLY MEASURED (CUK ALPHA AND MOK ALPHA
400 RADIATION) AND SIMULTANEOUSLY REFINED (SEE PHYS. REV. B, VOL.38,
400 P.874, 1988). ALL MEASUREMENTS WERE CARRIED OUT AT AMBIENT
400 TEMPERATURE. ONLY A SMALL AMOUNT OF TWINNING WAS DETECTED AND
400 ACCOUNTED FOR MATHEMATICALLY. THE THERMAL PARAMETERS WERE EXPANDED
400 BEYOND SECOND ORDER TENSORS (ANISOTROPIC DEBYE-WALLER FACTORS) TO
400 HIGHER ORDERS, USING THE GRAM-CHARLIER FORMALISM. IT WAS POSSIBLE TO
400 REFINE UP TO FOURTH ORDER TENSORS FOR THE METAL ATOMS IN BA/SUB
400 2/YCU/SUB 3/O/SUB 7/ AND SECOND ORDER TENSORS FOR THE OXYGEN ATOMS
400 DUE TO THEIR CONSIDERABLY SMALLER SCATTERED POWER. HERE THE RESULTS
400 FOR THE SECOND ORDER TERMS ARE DISCUSSED SEPARATELY FROM THE HIGHER
400 ORDER EXPANSION.
500 BARIUM COMPOUNDS; DEBYE-WALLER FACTORS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LATTICE DYNAMICS; X-RAY DIFFRACTION EXAMINATION OF
500 MATERIALS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; THERMAL VIBRATIONS; X-RAY
510 DIFFRACTION; ELECTRON-PHONON INTERACTION; CRYSTAL POTENTIAL; DEBYE
510 WALLER FACTORS; BA/SUB 2/YCU/SUB 3/O/SUB 7/.
550 BA2YCU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS.
DOCUMENT= 1313
AUTH = TAI
DT = 02
KN = B40891304685
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385843
002 B40891304685
010 JOURNAL PAPER; EXPERIMENTAL.
100 THE OCCURRENCE OF SUPERCONDUCTIVITY IN THE HO(BA/SUB 2-X/SR/SUB
100 X/)CU/SUB 3/O/SUB 7- DELTA / SYSTEM.
200 TAI, M.F.; HWANG, J.R.; KU, H.C.
220 DEPT. OF PHYS., NAT. TSING HUA UNIV., HSINCHU, TAIWAN
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 MARCH 1989. VOL.3, NO.3, P.225-7, REF.6
350 ISSN 0217-9849
400 ELECTRICAL, MAGNETIC AND CRYSTALLOGRAPHIC MEASUREMENTS HAVE BEEN
400 CARRIED OUT FOR THE PSEUDOQUATERNARY HO(BA/SUB 2-X/SR/SUB X/)CU/SUB
400 3/O/SUB 7- DELTA / SYSTEM IN ORDER TO CHECK THE SYSTEMATIC VARIATION
400 OF SUPERCONDUCTING TRANSITION TEMPERATURE T/SUB C/, NORMAL STATE
400 ELECTRICAL RESISTIVITY AND PHASE BOUNDARY. T/SUB C/ DECREASES
400 MONOTONICALLY WITH THE INCREASING SR SUBSTITUTION AND DROPS SHARPLY
400 TO ZERO FOR X>OR=1.6. NO RESISTIVITY ANOMALY WAS OBSERVED.
500 BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 ELECTRICAL CONDUCTIVITY OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; HOLMIUM COMPOUNDS; MAGNETIC
500 SUSCEPTIBILITY; MEISSNER EFFECT; STRONTIUM COMPOUNDS; SUPERCONDUCTING
500 TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTOR; MAGNETIC SUSCEPTIBILITY; ELECTRICAL
510 MEASUREMENTS; MEISSNER EFFECT; CERAMIC; LATTICE PARAMETERS;
510 CRYSTALLOGRAPHIC MEASUREMENTS; SUPERCONDUCTING TRANSITION
510 TEMPERATURE; NORMAL STATE ELECTRICAL RESISTIVITY; PHASE BOUNDARY; SR
510 SUBSTITUTION; RESISTIVITY ANOMALY; HO(BA/SUB 2-X/SR/SUB X/)CU/SUB
510 3/O/SUB 7- DELTA /.
550 HOBASRCU3O/SS CU3/SS BA/SS CU/SS HO/SS SR/SS O/SS.
DOCUMENT= 1314
AUTH = ZHAO
DT = 02
KN = B40891304686
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385844
002 B40891304686
010 JOURNAL PAPER; EXPERIMENTAL.
100 JOSEPHSON EFFECTS IN A Y/SUB 1/BA/SUB 2/CU/SUB 3/O/SUB 7/ BREAK
100 JUNCTION AT 77 K.
200 ZHAO, S.P.; TAO, H.J.; CHEN, Y.F.; CHE, G.C.; YANG, Q.S.
220 INST. OF PHYS., CHINESE ACAD. OF SCI., BEIJING, CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 MARCH 1989. VOL.3, NO.3, P.229-34, REF.14
350 ISSN 0217-9849
400 JOSEPHSON EFFECTS IN A Y/SUB 1/BA/SUB 2/CU/SUB 3/O/SUB 7/ BREAK
400 JUNCTION AT 77 K ARE REPORTED. THE I-V CHARACTERISTICS SHOW CLEAR
400 SHAPIRO STEPS UNDER MICROWAVE RADIATION AND MAGNETIC DEPENDENCE OF
400 THE CRITICAL CURRENT IS OF THE TYPICAL FRAUNHOFER DIFFRACTION
400 PATTERN. ESTIMATE OF THE MAGNETIC PENETRATION DEPTH IS GIVEN.
400 DISCUSSIONS OF THE I-V CURVE CONCERNING NONSTATIONARY PROCESSES ARE
400 PRESENTED.
500 BARIUM COMPOUNDS; CRITICAL CURRENTS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; JOSEPHSON EFFECT; PENETRATION DEPTH
500 (SUPERCONDUCTIVITY); YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; BREAK JUNCTION; JOSEPHSON EFFECTS;
510 I-V CHARACTERISTICS; CLEAR SHAPIRO STEPS; MICROWAVE RADIATION;
510 MAGNETIC DEPENDENCE; CRITICAL CURRENT; FRAUNHOFER DIFFRACTION
510 PATTERN; MAGNETIC PENETRATION DEPTH; NONSTATIONARY PROCESSES; 77 K;
510 Y/SUB 1/BA/SUB 2/CU/SUB 3/O/SUB 7/.
550 Y1BA2CU3O7/INT BA2/INT CU3/INT BA/INT CU/INT O7/INT Y1/INT O/INT
550 Y/INT Y1BA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS Y1/SS O/SS Y/SS.
560 TEMPERATURE 7.7 E+01 K.
DOCUMENT= 1315
AUTH = WITEK
DT = 02
KN = B40891304687
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385845
002 B40891304687
010 JOURNAL PAPER; EXPERIMENTAL.
100 BI-SR-CA-CU-O SURFACE STUDIED BY MEANS OF SCANNING TUNNELLING
100 MICROSCOPE.
200 WITEK, A.; DABKOWSKI, A.; RAULUSZKIEWICZ, J.
220 INST. OF PHYS., POLISH ACAD. OF SCI., WARSZAWA, POLAND
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 MARCH 1989. VOL.3, NO.3, P.235-9, REF.8
350 ISSN 0217-9849
400 SURFACE TOPOGRAPHY OF THE HIGH-T/SUB C/ SUPERCONDUCTOR BISRCACU/SUB
400 2/O/SUB X/ HAS BEEN INVESTIGATED BY MEANS OF SCANNING TUNNELLING
400 MICROSCOPY. THE MEASUREMENTS WERE PERFORMED ON THE NATURAL SURFACE OF
400 CERAMIC MATERIAL IN AIR AT ROOM TEMPERATURE. IT CAN BE DEDUCED FROM
400 THE SURFACE IMAGES, THAT BULK ORTHORHOMBIC CRYSTAL STRUCTURE EXTENDS
400 TO THE SURFACE. THE SURFACE SEEMS TO BE UNIFORM METALLIC IN CHARACTER
400 AND NOT DRASTICALLY CONTAMINATED. REGULAR STEPS OBSERVED ON THE
400 SURFACE CORRESPOND TO THE DIMENSION OF THE UNIT CELL IN Z DIRECTION
400 OR ITS MULTIPLES.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CERAMICS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; STRONTIUM COMPOUNDS; SURFACE TOPOGRAPHY.
510 HIGH TEMPERATURE SUPERCONDUCTOR; SURFACE TOPOGRAPHY; SCANNING
510 TUNNELLING MICROSCOPE; HIGH-T/SUB C/ SUPERCONDUCTOR; CERAMIC; BULK
510 ORTHORHOMBIC CRYSTAL STRUCTURE; BISRCACU/SUB 2/O/SUB X/.
550 BISRCACU2O/SS CU2/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1316
AUTH = LAURENT
DT = 02
KN = B40891304688
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385846
002 B40891304688
010 JOURNAL PAPER; EXPERIMENTAL.
100 FLUCTUATION CONDUCTIVITY EFFECTS ON THERMOELECTRIC POWER OF GRANULAR
100 BI/SUB 1.75/PB/SUB 0.25/CA/SUB 2/SR/SUB 2/CU/SUB 3/O/SUB 10/
100 SUPERCONDUCTOR.
200 LAURENT, C. / PATAPIS, S.K.; GREEN, S.M.; LUO, H.L.; POLITIS, C.;
200 DURCZEWSKI, K.; AUSLOOS, M.
220 INST. MONTEFIORE, LIEGE UNIV., BELGIUM
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 MARCH 1989. VOL.3, NO.3, P.241-8, REF.25
350 ISSN 0217-9849
400 THE AUTHORS REPORT PRECISE MEASUREMENTS OF THE THERMOELECTRIC POWER
400 (TEP) OF GRANULAR SUPERCONDUCTING BI/SUB 1.75/PB/SUB 0.25/CA/SUB
400 2/SR/SUB 2/CU/SUB 3/O/SUB 10/. THE TEP IS STRICTLY LINEAR AT HIGH
400 TEMPERATURE. SUPERCONDUCTIVITY FLUCTUATIONS SET IN AT ABOUT 140 K.
400 FROM THE TEMPERATURE DERIVATIVE OF THE EXCESS TEP (WITH RESPECT TO A
400 STRAIGHT LINE AT 'HIGH TEMPERATURE'), THE CRITICAL BEHAVIOR IS
400 OBTAINED IN THE MEAN FIELD REGIME, AND IS FOUND IDENTICAL TO THAT OF
400 THE TEMPERATURE DERIVATIVE OF THE EXCESS ELECTRICAL RESISTIVITY.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; FLUCTUATIONS IN
500 SUPERCONDUCTORS; HIGH-TEMPERATURE SUPERCONDUCTORS; LEAD COMPOUNDS;
500 STRONTIUM COMPOUNDS; THERMOELECTRIC EFFECTS IN SEMICONDUCTORS AND
500 INSULATORS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; FLUCTUATION CONDUCTIVITY EFFECTS;
510 THERMOELECTRIC POWER; HIGH TEMPERATURE; CRITICAL BEHAVIOR; MEAN FIELD
510 REGIME; TEMPERATURE DERIVATIVE; EXCESS ELECTRICAL RESISTIVITY;
510 GRANULAR BI/SUB 1.75/PB/SUB 0.25/CA/SUB 2/SR/SUB 2/CU/SUB 3/O/SUB 10/
510 SUPERCONDUCTOR.
550 BI1.75PB0.25CA2SR2CU3O10/SS BI1.75/SS PB0.25/SS CA2/SS CU3/SS O10/SS
550 SR2/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS.
DOCUMENT= 1317
AUTH = SHENG
DT = 02
KN = B40891304689
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385847
002 B40891304689
010 JOURNAL PAPER; EXPERIMENTAL.
100 PREPARATION AND CHARACTERIZATION OF UNUSUAL LEVITATION TL-BA-CA-CU-O
100 SAMPLES.
200 SHENG, Z.Z.; LIU, Y.H.; FEI, X.; SHENG, L.; DONG, C.; HARTER, W.G.;
200 HERMANN, A.M. / VIER, D.C.; SCHULTZ, S.; OSEROFF, S.B.
220 DEPT. OF PHYS., ARKANSAS UNIV., FAYETTEVILLE, AR, USA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 MARCH 1989. VOL.3, NO.3, P.249-255, REF.20
350 ISSN 0217-9849
400 A PREPARATION PROCEDURE FOR THE TL-BA-CA-CU-O SUPERCONDUCTING SAMPLES
400 WHICH CAN BE LEVITATED ABOVE OR BENEATH A MAGNET IS DESCRIBED. X-RAY
400 POWDER DIFFRACTION DATA FOR THESE SAMPLES ARE PRESENTED AND
400 DISCUSSED. THEIR ELECTRONIC AND MAGNETIC PROPERTIES ARE PRESENTED.
400 THE EXPLANATION FOR THE UNUSUAL LEVITATION IS BRIEFLY DISCUSSED.
500 BARIUM COMPOUNDS; CALCIUM COMPOUNDS; CERAMICS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; MAGNETIC HYSTERESIS; MAGNETIC LEVITATION; MAGNETIC
500 SUSCEPTIBILITY; POWDER TECHNOLOGY; THALLIUM COMPOUNDS; X-RAY
500 DIFFRACTION EXAMINATION OF MATERIALS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ELECTRONIC PROPERTIES; CERAMIC;
510 HYSTERESIS LOOPS; SUSCEPTIBILITY; CHARACTERIZATION; PREPARATION
510 PROCEDURE; X-RAY POWDER DIFFRACTION; MAGNETIC PROPERTIES; LEVITATION;
510 TL-BA-CA-CU-O.
550 TLBACACUO/SS BA/SS CA/SS CU/SS TL/SS O/SS.
DOCUMENT= 1318
AUTH = LIU
DT = 02
KN = B40891304690
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385848
002 B40891304690
010 JOURNAL PAPER; EXPERIMENTAL.
100 OBSERVATION OF SPIN FLUCTUATIONS IN BI-SR-CA-CU-O SYSTEMS.
200 LIU, J.Q.; TIAN, S.Y.; YAN, Y.F.; LIU, Z.X.; CHANG, D.W.; ZHAO, Z.X.
220 INST. OF PHYS., BEIJING, CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 MARCH 1989. VOL.3, NO.3, P.257-62, REF.5
350 ISSN 0217-9849
400 FOLLOWING THE OBSERVATIONS OF SPIN-PAIR EXCITATIONS IN LA/SUB
400 2/CUO/SUB 4/ AND YBA/SUB 2/CU/SUB 3/O/SUB 6+ DELTA /, SIMILAR RESULTS
400 IN BI-SR-CA-CU-O SYSTEMS ARE OBTAINED. THE CENTER FREQUENCIES OF THE
400 EXCITATIONS ARE ABOUT 1900-2300 CM/SUP -1/, WHICH CORRESPOND TO THE
400 VALUE OF THE EXCHANGE CONSTANT J APPROXIMATELY 690-840 CM/SUP -1/.
400 THE EXTRAORDINARY SIMILARITY SUGGESTS THE SAME ORIGIN OF
400 SUPERCONDUCTIVITY OF THESE THREE KINDS OF COPPER OXIDES
400 SUPERCONDUCTORS. THIS MEANS THAT ANY THEORY OF SUPERCONDUCTIVITY IN
400 COPPER OXIDES SHOULD ACCOUNT EXPLICITLY FOR THESE HIGHLY ENERGETIC
400 SPIN FLUCTUATIONS.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; EXCHANGE INTERACTIONS
500 (ELECTRON); FLUCTUATIONS IN SUPERCONDUCTORS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; SPIN DYNAMICS; STRONTIUM COMPOUNDS.
510 SPIN FLUCTUATIONS; SPIN-PAIR EXCITATIONS; CENTER FREQUENCIES;
510 EXCHANGE CONSTANT; 1900 TO 2300 CM/SUP -1/; BI-SR-CA-CU-O.
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
560 WAVELENGTH 4.3 E-06 TO 5.3 E-06 M.
DOCUMENT= 1319
AUTH = CHING
DT = 02
KN = B40891304691
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385849
002 B40891304691
010 JOURNAL PAPER; THEORETICAL.
100 INTERBAND OPTICAL CONDUCTIVITY OF BI/SUB 2/CASR/SUB 2/CU/SUB 2/O/SUB
100 8/.
200 CHING, W.Y.; ZHAO, G.L.; XU, Y.N. / WONG, K.W.
220 DEPT. OF PHYS., MISSOURI UNIV., KANSAS CITY, MI, USA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 MARCH 1989. VOL.3, NO.3, P.263-9, REF.10
350 ISSN 0217-9849
400 THE BAND STRUCTURE AND INTERBAND OPTICAL CONDUCTIVITY OF BI/SUB
400 2/CASR/SUB 2/CU/SUB 2/O/SUB 8/ SUPERCONDUCTOR IN THE BODY-CENTERED
400 TETRAGONAL SUB-UNIT IS CALCULATED SELF-CONSISTENTLY USING
400 ORTHOGONALIZED LINEAR COMBINATION OF ATOMIC ORBITALS METHOD. THE
400 RESULT SHOWS BI/SUB 2/CASR/SUB 2/CU/SUB 2/O/SUB 8/ HAS BOTH
400 SEMI-METAL-LIKE AND SEMICONDUCTOR-LIKE FEATURES WITH SMALL BAND GAP
400 AND BAND OVERLAP. THE INTERBAND OPTICAL CONDUCTIVITY SHOWS STRONG
400 ANISOTROPY BETWEEN THE IN-PLANE AND Z-DIRECTION COMPONENTS. A PLASMON
400 FREQUENCY AT 6 EV IS PREDICTED.
500 BAND STRUCTURE OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS; BISMUTH
500 COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; LCAO
500 CALCULATIONS; OPTICAL CONSTANTS; PLASMONS; STRONTIUM COMPOUNDS;
500 SUPERCONDUCTING ENERGY GAP.
510 HIGH TEMPERATURE SUPERCONDUCTOR; SEMIMETAL LIKE FEATURES;
510 ORTHOGONALIZED LCAO METHOD; BAND STRUCTURE; INTERBAND OPTICAL
510 CONDUCTIVITY; BODY-CENTERED TETRAGONAL SUB-UNIT; SEMICONDUCTOR-LIKE
510 FEATURES; BAND GAP; BAND OVERLAP; ANISOTROPY; PLASMON FREQUENCY;
510 BI/SUB 2/CASR/SUB 2/CU/SUB 2/O/SUB 8/.
550 BI2CASR2CU2O8/SS BI2/SS CU2/SS SR2/SS BI/SS CA/SS CU/SS O8/SS SR/SS
550 O/SS.
DOCUMENT= 1320
AUTH = LOO
DT = 02
KN = B40891304692
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385850
002 B40891304692
010 JOURNAL PAPER; EXPERIMENTAL.
100 A RAMAN SPECTROSCOPIC STUDY OF BARIUM COPPER OXIDE.
200 LOO, B.H. / BURNS, D.H.; ROLIN, T.D.
220 DEPT. OF SYNTHETIC CHEM., FAC. OF ENG., TOKYO UNIV., JAPAN
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 MARCH 1989. VOL.3, NO.3, P.271-7, REF.11
350 ISSN 0217-9849
400 VARIOUS PHYSICAL TREATMENTS OF BACUO/SUB 2/ SAMPLES RESULT IN
400 IRREVERSIBLE CHANGES IN ITS RAMAN SPECTRUM. THE PROMINENT PEAKS AT
400 576 AND 628 CM/SUP -1/ IN THE SPECTRA OF SINTERED PELLETS OF
400 BACUO/SUB 2/ DISAPPEAR UPON FURTHER ANNEALING IN AIR OR OXYGEN OR
400 UPON MERE REGRINDING OF THE PELLETS. FURTHER ANNEALING IN AIR,
400 OXYGEN, OR VACUUM DOES NOT RESTORE THESE PEAKS. SIMILAR BUT LESS
400 INTENSE PEAKS REAPPEAR UPON EXPOSURE OF PELLETS TO LABORATORY
400 ENVIRONMENT FOR SEVERAL WEEKS, BUT THESE BROADEN AND DISAPPEAR UPON
400 FURTHER EXPOSURE. THESE SPECTRAL CHARACTERISTICS CONTRAST WITH THOSE
400 OBSERVED IN Y123 RAMAN SPECTRUM. IT IS CONCLUDED THAT THE PEAKS AT
400 582 CM/SUP -1/ AND 636 CM/SUP -1/ IN THE SPECTRA OF SINTERED PELLETS
400 OF Y123 ARE NOT DUE TO THE PRESENCE OF BACUO/SUB 2/.
500 ANNEALING; BARIUM COMPOUNDS; CERAMICS; RAMAN SPECTRA OF INORGANIC
500 SOLIDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CERAMIC; RAMAN SPECTROSCOPIC STUDY;
510 PHYSICAL TREATMENTS; SINTERED PELLETS; ANNEALING; ANNEALING; 576
510 CM/SUP -1/; 628 CM/SUP -1/; BACUO/SUB 2/; YBA/SUB 2/CU/SUB 3/O/SUB
510 7/.
550 YBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS; BACUO2/SS
550 BA/SS CU/SS O2/SS O/SS.
560 WAVELENGTH 1.74 E-05 M; WAVELENGTH 1.59 E-05 M.
DOCUMENT= 1321
AUTH = HUO
DT = 02
KN = B40891304693
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385851
002 B40891304693
010 JOURNAL PAPER; EXPERIMENTAL.
100 MICROWAVE INDUCED DC VOLTAGE ACROSS THE BRIDGE OF YBACUO
100 SUPERCONDUCTING BULK.
200 HUO, Y.H.; SUN, F.T.; FEN, H.H. / YAN, J.
220 DEPT. OF ELECTRON SCI., NANKAI UNIV., CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.285-90, REF.5
350 ISSN 0217-9849
400 FOR THE BRIDGE OF YBACUO SUPERCONDUCTING BULK, THERE IS AN INDUCED DC
400 VOLTAGE ACROSS THE BRIDGE WHEN IT IS EXPOSED TO MICROWAVE RADIATION
400 ALONG AND LEFT UNBIASED. THE MAGNITUDE AND THE POLARITY OF INDUCED DC
400 VOLTAGE ARE SENSITIVE TO MICROWAVE POWER AND FREQUENCY. FOR SOME
400 BRIDGES THE AUTHORS CARVED, THE CHANGE OF ITS INDUCED DC VOLTAGE WITH
400 TIME HAS BETTER REPEATIVITY.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; JOSEPHSON EFFECT;
500 YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; MICROWAVE INDUCED DC VOLTAGE;
510 REVERSE AC JOSEPHSON EFFECT; YBACUO.
550 YBACUO/INT BA/INT CU/INT O/INT Y/INT YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1322
AUTH = DING
DT = 02
KN = B40891304694
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385852
002 B40891304694
010 JOURNAL PAPER; EXPERIMENTAL.
100 SOME PROPERTIES OF VANADIUM DOPED Y-BA-CU-O SUPERCONDUCTOR.
200 DING, S.Y.; YU, Z.; GAO, P.; SHI, K.X.
220 DEPT. OF PHYS., NANJING UNIV., CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.291-3, REF.1
350 ISSN 0217-9849
400 SAMPLES OF YBA/SUB 2/CU/SUB 3-X/V/SUB X/O/SUB Y/ WITH VARIOUS X
400 VALUES WERE MADE TO STUDY THE EFFECTS OF DOPING ELEMENT ON PROPERTIES
400 OF Y-BA-CU-O SUPERCONDUCTOR. THE DOPED SAMPLES SHOW AN ALMOST
400 UNCHANGED T/SUB C/ VALUE. WHEREAS THE VOLUME FRACTION OF
400 SUPERCONDUCTING PHASE DECREASES WITH THE INCREASE OF THE VALUE OF X.
400 THE SIZES OF GRANULE IN THE DOPED SAMPLES ARE SMALLER THAN THAT OF
400 THE UNDOPED ONES. THE DOPED SAMPLES ARE ALSO DENSER AND HARDER.
400 DEPENDENCE OF J/SUB C/ ON T FOR X=0.6 WAS ALSO MEASURED AT H=510 G
400 AND IN T>50 K. ALL OF THE RESULTS MADE ONE SPECULATE THAT THE
400 VANADIUM APPEARS MAINLY AT INTERFACE AS A KIND OF IMPURITY. IT WAS
400 CONSIDERED THAT IMPROVING THE CONNECTEDNESS OF THE INTERFACE IS MORE
400 IMPORTANT THAN INCREASING THE FRACTION OF SUPERCONDUCTING PHASE AS
400 CONDITIONS FOR ENHANCING J/SUB C/ OF OXIDE SUPERCONDUCTORS.
500 BARIUM COMPOUNDS; CERAMICS; CRITICAL CURRENT DENSITY
500 (SUPERCONDUCTIVITY); HIGH-TEMPERATURE SUPERCONDUCTORS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; SUPERCONDUCTING TRANSITION
510 TEMPERATURE; CRITICAL CURRENT DENSITY; DOPING ELEMENT; IMPURITY;
510 OXIDE SUPERCONDUCTORS; YBA/SUB 2/CU/SUB 3-X/V/SUB X/O/SUB Y/.
550 YBA2CUVO/SS BA2/SS BA/SS CU/SS O/SS V/SS Y/SS.
DOCUMENT= 1323
AUTH = CHEN
DT = 02
KN = B40891304695
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385853
002 B40891304695
010 JOURNAL PAPER; EXPERIMENTAL.
100 MEASUREMENT OF ANISOTROPIC THERMOPOWER IN SINGLE CRYSTALS BI/SUB
100 2/SR/SUB 2/CACU/SUB 2/O/SUB Y/.
200 CHEN, G.H.; WANG, J.H.; ZHENG, D.N.; YAN, Y.F.; JIA, S.L.; YANG,
200 Q.S.; NI, Y.M.; ZHAO, Z.X.
220 INST. OF PHYS., CHINESE ACAD. OF SCI., BEIJING, CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.295-9, REF.11
350 ISSN 0217-9849
400 THE THERMOPOWER IN SINGLE CRYSTALS OF THE HIGH T/SUB C/
400 SUPERCONDUCTOR BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB Y/ HAS BEEN
400 MEASURED IN BOTH THE A-B PLANE (S/SUB AB/) AND ALONG THE C AXIS
400 (S/SUB C/) RESPECTIVELY. THE TEMPERATURE DEPENDENCES ARE DISTINCTLY
400 ANISOTROPIC. S/SUB C/ INCREASES MONOTONOUSLY WITH TEMPERATURE AND IS
400 POSITIVE FROM T/SUB C/ TO ROOM TEMPERATURE, WHILE S/SUB AB/ INCREASES
400 RAPIDLY NEAR T/SUB C/ AND THEN DECREASES WITH TEMPERATURE. THE
400 MAXIMUM OF S/SUB AB/ INCREASES RAPIDLY NEAR T/SUB C/ AND THEN
400 DECREASES WITH TEMPERATURE. THE MAXIMUM OF S/SUB AB/ IS AT 115 K AND
400 S/SUB AB/ CHANGES ITS SIGN AT 250 K.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; STRONTIUM COMPOUNDS; THERMOELECTRIC EFFECTS IN
500 SEMICONDUCTORS AND INSULATORS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ANISOTROPIC THERMOPOWER; SINGLE
510 CRYSTALS; HIGH T/SUB C/ SUPERCONDUCTOR; TEMPERATURE DEPENDENCES;
510 BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB Y/.
550 BI2SR2CACU2O/SS BI2/SS CU2/SS SR2/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1324
AUTH = CHEN
DT = 02
KN = B40891304696
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385854
002 B40891304696
010 JOURNAL PAPER; EXPERIMENTAL.
100 HIGH T/SUB C/ SUPERCONDUCTING FILMS AND POWDERS SYNTHESIZED BY
100 SOL-GEL PROCESSES.
200 CHEN, F.; LUO, S.; LI, N. / LI, C.; JIE, B.; LI, G.; YIN, D.
220 DEPT. OF CHEM., PEKING UNIV., BEIJING, CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.301-6, REF.4
350 ISSN 0217-9849
400 A SOL-GEL METHOD PRODUCING SLICE-FORM FINE POWDER OF HIGH T/SUB C/
400 Y-BA-CU-O AND BI-SR-CA-CU-O BY ORGANIC AMINE-PRECIPITATION IS
400 PRESENTED. THE AVERAGE GRAIN SIZE OF SUCH POWDERS IS MUCH SMALLER
400 THAN THAT BY THE CONVENTIONAL SOLID-REACTION. SUPERCONDUCTING FILMS
400 OF Y-BA-CU-O WITH ZERO RESISTANCE T/SUB CO/=82.5 K PREPARED BY THIS
400 METHOD MANIFEST STRONG (001) TEXTURE. THE REASON FOR PREFERENTIAL
400 ORIENTATION ON POLYCRYSTAL SUBSTRATE IS DISCUSSED.
500 BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; GRAIN SIZE;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; POWDER TECHNOLOGY; SOL-GEL
500 PROCESSING; STRONTIUM COMPOUNDS; SUPERCONDUCTING THIN FILMS; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; FILMS; POWDERS; SOL-GEL PROCESSES;
510 ORGANIC AMINE-PRECIPITATION; GRAIN SIZE; TEXTURE; PREFERENTIAL
510 ORIENTATION; POLYCRYSTAL SUBSTRATE; 82.5 K; Y-BA-CU-O; BI-SR-CA-CU-O.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS; BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS
550 O/SS.
560 TEMPERATURE 8.25 E+01 K.
DOCUMENT= 1325
AUTH = CAO
DT = 02
KN = B40891304697
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385855
002 B40891304697
010 JOURNAL PAPER; EXPERIMENTAL.
100 COMPOSITION DEPENDENCE OF SUPERCONDUCTIVITY AND CRYSTAL STRUCTURE IN
100 LA(BA/SUB 1-X/CA/SUB X/)/SUB 2/CU/SUB 3/O/SUB 7-Y/ SYSTEM.
200 CAO, N.; ZHENG, J.Q.; SHAO, X.Y.; CHEN, X.S.; GUAN, W.Y.
220 INST. OF PHYS., CHINESE ACAD. OF SCI., BEIJING, CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.307-11, REF.5
350 ISSN 0217-9849
400 THE COMPOSITION DEPENDENCE OF SUPERCONDUCTIVITY AND CRYSTAL STRUCTURE
400 IN LA(BA/SUB 1-X/CA/SUB X/)/SUB 2/CU/SUB 3/O/SUB 7-Y/ SYSTEM WAS
400 DETERMINED BY RESISTIVITY MEASUREMENTS AND X-RAY DIFFRACTION
400 ANALYSIS. THE SUPERCONDUCTING TRANSITION TEMPERATURE IS RAISED WITH
400 THE INCREASE OF CA CONTENT TILL X=0.6, AT WHICH THE ZERO RESISTANCE
400 TEMPERATURE OF THE SAMPLE IS 81.5 K. IN THE MEANWHILE, THE CRYSTAL
400 STRUCTURE OF THE SAMPLE CHANGED FROM TETRAGONAL (X=0) TO ORTHORHOMBIC
400 STRUCTURE (X=0.2, 0.4, 0.6). WITH FURTHER INCREASE OF CA CONTENT, THE
400 SUPERCONDUCTIVITY DECREASE FOR THE SAMPLE OF X=0.8 WITH MIXED PHASES
400 INCLUDING THE ORTHORHOMBIC OXYGEN-DEFICIENT PEROVSKITE-LIKE (ODP)
400 STRUCTURE AND NO SUPERCONDUCTING TRANSITION IS FOUND AT 4.2 K FOR THE
400 SAMPLE OF X=1 WITHOUT THE ODP STRUCTURE. A POSSIBLE EXPLANATION OF
400 THESE EXPERIMENTAL RESULTS IS GIVEN.
500 BARIUM COMPOUNDS; CALCIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF
500 INORGANIC COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM
500 COMPOUNDS; SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTOR; COMPOSITIONAL DEPENDENCE;
510 SUPERCONDUCTIVITY; CRYSTAL STRUCTURE; RESISTIVITY; X-RAY DIFFRACTION
510 ANALYSIS; SUPERCONDUCTING TRANSITION TEMPERATURE; ZERO RESISTANCE
510 TEMPERATURE; TETRAGONAL; ORTHORHOMBIC; PEROVSKITE-LIKE; 81.5 K;
510 LA(BA/SUB 1-X/CA/SUB X/)/SUB 2/CU/SUB 3/O/SUB 7-Y/.
550 LABACACU3O/SS CU3/SS BA/SS CA/SS CU/SS LA/SS O/SS.
560 TEMPERATURE 8.15 E+01 K.
DOCUMENT= 1326
AUTH = RUAN
DT = 02
KN = B40891304698
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385856
002 B40891304698
010 JOURNAL PAPER; EXPERIMENTAL.
100 THERMAL EXPANSION COEFFICIENTS OF YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ WITH
100 ORTHORHOMBIC AND TETRAGONAL PHASES.
200 RUAN, Y.Z.; LI, L.P.; HU, X.L.; PENG, D.K.; HU, J.B.; ZHANG, Y.H.
220 DEPT. OF PHYS., UNIV. OF SCI. ? TECHNOL. OF CHINA, ANHUI, CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.325-9, REF.12
350 ISSN 0217-9849
400 THERMAL EXPANSION COEFFICIENTS OF YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ WITH
400 THE TETRAGONAL AND ORTHORHOMBIC STRUCTURAL PHASES WERE MEASURED BY
400 THE METHOD OF DIFFERENTIAL PARALLEL-PLATE CAPACITANCE. THERE EXIST
400 ANOMALIES NEAR 205 K FOR ORTHORHOMBIC PHASE AND BETWEEN 92-130 K FOR
400 TETRAGONAL PHASE, RESPECTIVELY. THE AUTHORS SUGGEST THAT THE FORMER
400 MAY BE RELATED TO THE LATTICE INSTABILITY, INDICATING THAT THERE IS A
400 STRONG ELECTRON-PHONON INTERACTION; THE LATTER MAY BE THE RESULT FROM
400 THE STRUCTURAL PHASE TRANSITION WHICH DAMAGES THE HIGH T/SUB C/
400 SUPERCONDUCTIVITY. IN THE MEANTIME, A SMALL JUMP OF THE THERMAL
400 EXPANSION COEFFICIENT AT T/SUB C/ WAS OBSERVED IN THE ORTHORHOMBIC
400 PHASE AND FROM THIS THE PRESSURE EFFECT WAS ESTIMATED.
500 BARIUM COMPOUNDS; ELECTRON-PHONON INTERACTIONS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; THERMAL EXPANSION; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; THERMAL EXPANSION COEFFICIENTS;
510 ORTHORHOMBIC; TETRAGONAL; DIFFERENTIAL PARALLEL-PLATE CAPACITANCE;
510 LATTICE INSTABILITY; ELECTRON-PHONON INTERACTION; STRUCTURAL PHASE
510 TRANSITION; HIGH T/SUB C/ SUPERCONDUCTIVITY; PRESSURE EFFECT; 92 TO
510 130 K; 205 K; YBA/SUB 2/CU/SUB 3/O/SUB 7-X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 9.2 E+01 TO 1.3 E+02 K; TEMPERATURE 2.05 E+02 K.
DOCUMENT= 1327
AUTH = YUAN
DT = 02
KN = B40891304699
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385857
002 B40891304699
010 JOURNAL PAPER; EXPERIMENTAL.
100 POSSIBLE ROLE OF PB IN BI/SUB 2-X/PB/SUB X/SR/SUB 2/CU/SUB 3/O/SUB Y/
100 SYSTEM.
200 YUAN, S.L.; JIN, S.Z. / ZHU, B.; WANG, W.; ZHENG, J.Q.; ZHENG, G.G.;
200 GUAN, W.Y.
220 CHINESE UNIV. OF SCI. ? TECHNOL., HEFEI, CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.331-4, REF.6
350 ISSN 0217-9849
400 THE PRELIMINARY STUDY ON THE ELECTRON SPIN RESONANCE (ESR) FOR THE
400 BI/SUB 2-X/PB/SUB X/SR/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB Y/ SYSTEM HAS
400 BEEN MADE AT ROOM TEMPERATURE. IT IS FOUND THAT NO SIGNIFICANT ESR
400 SIGNAL APPEARS FOR PB-SUBSTITUTED BIPBSRCACUO SYSTEM AT RT, BUT A
400 STRONG ESR SIGNAL WAS FOUND FOR BISRCACUO SYSTEM WITH 90 K
400 SUPERCONDUCTING TRANSITION UNDER THE SAME EXPERIMENTAL CONDITIONS.
400 THESE MIGHT BE ATTRIBUTED TO THE CU/SUP 3+//CU/SUP 2+/ RATIO IN THE
400 BISMUTH BASED SYSTEMS. A POSSIBLE ROLE OF PB IN THE BI/SUB 2-X/PB/SUB
400 X/SR/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB Y/ SYSTEM IS DISCUSSED.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LEAD COMPOUNDS; PARAMAGNETIC RESONANCE; STRONTIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ELECTRON SPIN RESONANCE; CU/SUP
510 3+//CU/SUP 2+/ RATIO; BI/SUB 2-X/PB/SUB X/SR/SUB 2/CU/SUB 3/O/SUB Y/.
550 BIPBSR2CU3O/SS CU3/SS SR2/SS BI/SS CU/SS PB/SS SR/SS O/SS.
DOCUMENT= 1328
AUTH = XIA
DT = 02
KN = B40891304700
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385858
002 B40891304700
010 JOURNAL PAPER; EXPERIMENTAL.
100 SUPERCONDUCTIVITY IN PB-DOPED BI-CA-SR-CU-O SYSTEM.
200 XIA, J.S.; FAN, M.H.; HE, Z.H.; ZHANG, Q.R. / CHEN, J.; CHEN, Z.Y.;
200 QIAN, Y.T.
220 DEPT. OF PHYS., UNIV. OF SCI. ? TECHNOL. OF CHINA, HEFEI, CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.335-9, REF.8
350 ISSN 0217-9849
400 A NEW SUPERCONDUCTING TRANSITION NEAR 100 K WAS OBSERVED IN THE
400 PB-DOPED BI-CA-SR-CU-O SAMPLES. COMPARED WITH THE 107 K AND 65 K
400 PHASES, THE VOLUME FRACTION OF THIS SUPERCONDUCTING PHASE IS VERY
400 SMALL, BUT FORMS AN EFFECTIVE CONNECTION BETWEEN THE GRAINS OF THE
400 OTHER TWO PHASES. IT IS SUGGESTED THAT THE NEW PHASE PLAYS AN
400 IMPORTANT ROLE FOR T/SUB C/ ABOVE 100 K IN THE BI/SUB 2-X/PB/SUB
400 X/CA/SUB 2/SR/SUB 2/CU/SUB 3/O/SUB Y/ SYSTEM.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LEAD COMPOUNDS; MAGNETIC SUSCEPTIBILITY; STRONTIUM
500 COMPOUNDS; SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTOR; MAGNETIC SUSCEPTIBILITY;
510 SUPERCONDUCTING TRANSITION; VOLUME FRACTION; 100 K; BI/SUB 2-X/PB/SUB
510 X/CA/SUB 2/SR/SUB 2/CU/SUB 3/O/SUB Y/; BI-PB-CA-SR-CU-O SYSTEM.
550 BIPBCASRCUO/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS; BIPBCA2SR2CU3O/SS
550 CA2/SS CU3/SS SR2/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS.
560 TEMPERATURE 1.0 E+02 K.
DOCUMENT= 1329
AUTH = WANG
DT = 02
KN = B40891304701
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385859
002 B40891304701
010 JOURNAL PAPER; EXPERIMENTAL.
100 STRUCTURE OF BI-PB-SR-CA-CU-O SUPERCONDUCTOR WITH T/SUB C/ OF 108 K.
200 WANG, R.K.; HE, Q.; YU, D.A.; DI, X.X.; LI, Y.H.
220 GEN. RES. INST. FOR NON-FERROUS METALS, BEIJING, CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.341-7, REF.8
350 ISSN 0217-9849
400 FIVE DIFFERENT PHASES HAVE BEEN OBSERVED IN THE BI-PB-SR-CA-CU-O
400 SUPERCONDUCTING COMPOUND WITH T/SUB C/ OF 108 K. THE HIGH-T/SUB C/
400 AND LOW-T/SUB C/ SUPERCONDUCTING PHASES WITH THEIR COMPOSITIONS NEAR
400 (BI/SUB 0.82/PB/SUB 0.18/)/SUB 4/SR/SUB 4/CA/SUB 3/CU/SUB 6/O/SUB Y/
400 AND (BI/SUB 0.82/PB/SUB 0.18/)/SUB 4/SR/SUB 4/CA/SUB 2/CU/SUB 4/O/SUB
400 Y/ RESPECTIVELY HAVE FACE-CENTERED ORTHORHOMBIC STRUCTURE WITH
400 A=0.540 NM, B=0.545 NM, C=3.669 NM AND A=0.540 NM, B=0.546 NM,
400 C=3.077 NM, RESPECTIVELY, AND THE FORMER HAS THE SUPER-STRUCTURE OF
400 3.24 NM, THE LATTER HAS THE SUPER-STRUCTURE OF 2.7 NM AND IS
400 INCOMMENSURATE IN THE B-DIRECTION. IN ADDITION, TWO KINDS OF MINOR
400 PHASES WITH THEIR COMPOSITIONS NEAR (SR/SUB 0.6/CA/SUB 0.4/)CU/SUB
400 1.75/O/SUB Y/ AND (BI/SUB 0.86/PB/SUB 0.14/)/SUB 3/SR/SUB 1/CA/SUB
400 4/CU/SUB 1/O/SUB Y/ AS WELL AS CUO HAVE ALSO BEEN OBSERVED.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF
500 INORGANIC COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; LEAD
500 COMPOUNDS; STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CRYSTAL STRUCTURE; FACE-CENTERED
510 ORTHORHOMBIC STRUCTURE; INCOMMENSURATE; COMPOSITIONS; 108 K;
510 BI-PB-SR-CA-CU-O; (BI/SUB 0.82/PB/SUB 0.18/)/SUB 4/SR/SUB 4/CA/SUB
510 3/CU/SUB 6/O/SUB Y/; (BI/SUB 0.82/PB/SUB 0.18/)/SUB 4/SR/SUB 4/CA/SUB
510 2/CU/SUB 4/O/SUB Y/; (SR/SUB 0.6/CA/SUB 0.4/)CU/SUB 1.75/O/SUB Y/;
510 (BI/SUB 0.86/PB/SUB 0.14/)/SUB 3/SR/SUB 1/CA/SUB 4/CU/SUB 1/O/SUB Y/;
510 CUO.
550 CUO/BIN CU/BIN O/BIN; BIPBSRCACUO/SS BI/SS CA/SS CU/SS PB/SS SR/SS
550 O/SS; BI0.82PB0.18SR4CA3CU6O/SS BI0.82/SS PB0.18/SS CA3/SS CU6/SS
550 SR4/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS; BI0.82PB0.18SR4CA2CU4O/SS
550 BI0.82/SS PB0.18/SS CA2/SS CU4/SS SR4/SS BI/SS CA/SS CU/SS PB/SS
550 SR/SS O/SS; SR0.6CA0.4CU1.75O/SS CU1.75/SS CA0.4/SS SR0.6/SS CA/SS
550 CU/SS SR/SS O/SS; BI0.86PB0.14SR1CA4CU1O/SS BI0.86/SS PB0.14/SS
550 CA4/SS CU1/SS SR1/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS.
560 TEMPERATURE 1.08 E+02 K.
DOCUMENT= 1330
AUTH = YUAN
DT = 02
KN = B40891304702
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385860
002 B40891304702
010 JOURNAL PAPER; EXPERIMENTAL.
100 OBSERVATION OF THE ESR FOR HIGH-T/SUB C/ SUPERCONDUCTORS
100 BI-SR-CA-CU-O.
200 YUAN, S.L.; HOU, B.H.; JIN, S.Z. / WANG, W.; ZHENG, G.G.; RAN, Q.Z.;
200 GUAN, W.Y.; ZHENG, J.Q.
220 STRUCTURE ANAL. RES. LAB., UNIV. OF SCI. ? TECHNOL. OF CHINA, HEFEI,
220 CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.355-9, REF.4
350 ISSN 0217-9849
400 THE PRELIMINARY STUDY ON THE ELECTRON SPIN RESONANCE (ESR) FOR THE
400 BI-SR-CA-CU-O SYSTEM WITH DIFFERENT SUPERCONDUCTING TRANSITION
400 TEMPERATURES HAS BEEN MADE AT ROOM TEMPERATURE. IT IS FOUND THAT THE
400 LANDE FACTOR G-VALUES ARE INCREASED WITH INCREASING ZERO RESISTANCE
400 TEMPERATURE T/SUB C0/ BUT WIDTH BETWEEN PEAKS DELTA H/SUB PP/ OF THE
400 ESR SPECTRUM DECREASED WITH INCREASING T/SUB C0/. THESE MIGHT BE
400 ATTRIBUTED TO THE SPIN-ORBIT COUPLING OF THE MAGNETIC IONS AND THE
400 JAHN-TELLER DISTORTION IN THE PERPENDICULAR COMPONENT.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; G-FACTOR; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; JAHN-TELLER EFFECT; PARAMAGNETIC RESONANCE OF IRON
500 GROUP IONS AND IMPURITIES; SPIN-ORBIT INTERACTIONS; STRONTIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ESR; HIGH-T/SUB C/ SUPERCONDUCTORS;
510 ELECTRON SPIN RESONANCE; LANDE FACTOR G-VALUES; ZERO RESISTANCE
510 TEMPERATURE; SPIN-ORBIT COUPLING; JAHN-TELLER DISTORTION;
510 BI-SR-CA-CU-O.
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1331
AUTH = ZHENG
DT = 02
KN = B40891304703
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385861
002 B40891304703
010 JOURNAL PAPER; EXPERIMENTAL.
100 HREM STUDIES OF THE SUPERCONDUCTING PHASE TL/SUB 2/BA/SUB 2/CA/SUB
100 2/CU/SUB 3/O/SUB X/.
200 ZHENG, J.G.; CHEN, J.; JIANG, J.G.; LIANG, Y.H.; DING, S.Y.; YU, Z.;
200 LI, Q.; FENG, D.
220 INST. OF SOLID STATE PHYS., NANJING UNIV., CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.361-7, REF.5
350 ISSN 0217-9849
400 THE SUPERCONDUCTING PHASE TL/SUB 2/BA/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB
400 X/ (TL2223) HAS BEEN IDENTIFIED IN HIGH-T/SUB C/ SUPERCONDUCTING
400 CERAMICS WITH NOMINAL COMPOSITION OF TL/SUB 2/BA/SUB 2/CA/SUB
400 2/CU/SUB 3/. THE CONFIGURATIONS OF GRAINS AND GRAIN BOUNDARIES HAVE
400 ALSO BEEN OBSERVED DIRECTLY BY HIGH RESOLUTION ELECTRON MICROSCOPY
400 (HREM). THE SMALL ANGLE GRAIN BOUNDARIES ARE MIXED WITH BOTH
400 TRANSLATION AND ORIENTATION CHARACTERISTICS. THE BOUNDARY REGIONS ARE
400 NEARLY PARALLEL TO (100) TO (010) IN CRYSTAL STATE. WHILE IN
400 AMORPHOUS STATE, THEY ARE NEARLY PARALLEL TO (001). THERE ALSO EXISTS
400 LARGE ANGLE GRAIN BOUNDARIES IN TLBACACUO SUPERCONDUCTOR.
500 BARIUM COMPOUNDS; CALCIUM COMPOUNDS; CERAMICS; CRYSTAL
500 MICROSTRUCTURE; ELECTRON MICROSCOPE EXAMINATION OF MATERIALS; GRAIN
500 BOUNDARIES; HIGH-TEMPERATURE SUPERCONDUCTORS; THALLIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; HREM; SUPERCONDUCTING PHASE;
510 CERAMICS; GRAINS; GRAIN BOUNDARIES; HIGH RESOLUTION ELECTRON
510 MICROSCOPY; AMORPHOUS STATE; TL/SUB 2/BA/SUB 2/CA/SUB 2/CU/SUB
510 3/O/SUB X/.
550 TL2BA2CA2CU3O/SS BA2/SS CA2/SS CU3/SS TL2/SS BA/SS CA/SS CU/SS TL/SS
550 O/SS.
DOCUMENT= 1332
AUTH = LIU
DT = 02
KN = B40891304704
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385862
002 B40891304704
010 JOURNAL PAPER; EXPERIMENTAL.
100 PREPARATION AND FORMATION OF HIGH-T/SUB C/ PHASE IN BI/SUB 2-X/PB/SUB
100 X/SR/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB Y/ SYSTEM.
200 LIU, H.B.; ZHAN, X.N.; MAO, Z.Q.; ZHANG, W.J.; ZHOU, L.; LU, J.;
200 ZHOU, G.E.; LI, B.Y.; PENG, D.K.; CAO, L.Z.; RUAN, Y.Z.; CHEN, Z.J.;
200 ZHANG, Y.H.
220 UNIV. OF SCI. ? TECHNOL. OF CHINA, ANHUI, CHINA
310 MOD. PHYS. LETT. B (SINGAPORE)
330 20 MARCH 1989. VOL.3, NO.4, P.369-74, REF.8
350 ISSN 0217-9849
400 WITH THE AIM OF PREPARING A SINGLE, HIGH-T/SUB C/ PHASE IN THE BI/SUB
400 2-X/PB/SUB X/SR/SUB 2/CA/SUB 2/O/SUB Y/ SYSTEM, OPTIMIZATION OF THE
400 COMPOSITION AND HEAT TREATMENT HAVE BEEN STUDIED. IT WAS FOUND THAT
400 THE COMPOSITION AT WHICH THE MORE HIGH-T/SUB C/ PHASE FORMS, WAS
400 X=0.4 AND IN CONDITION (3). FOR SAMPLE 3(X=0.4), SPECIFIC HEAT
400 ANOMALY INDICATES THAT THE SUPERCONDUCTIVITY OF HIGH-T/SUB C/ PHASE
400 WAS A BULK PHENOMENON. THIS MEANS THERE IS MORE VOLUME FRACTION OF
400 HIGH-T/SUB C/ PHASE IN THIS SAMPLE.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CERAMICS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LEAD COMPOUNDS; POWDER TECHNOLOGY; SPECIFIC HEAT OF
500 SOLIDS; STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; PREPARATION; FORMATION; HIGH-T/SUB
510 C/ PHASE; COMPOSITION; HEAT TREATMENT; SPECIFIC HEAT ANOMALY; BI/SUB
510 2-X/PB/SUB X/SR/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB Y/.
550 BIPBSR2CA2CU3O/SS CA2/SS CU3/SS SR2/SS BI/SS CA/SS CU/SS PB/SS SR/SS
550 O/SS.
DOCUMENT= 1333
AUTH = BLATTER
DT = 02
KN = B40891304705
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385863
002 B40891304705
010 JOURNAL PAPER; EXPERIMENTAL.
100 CRITICAL CURRENTS AND MAGNETIC PROPERTIES OF CERAMIC HIGH-T/SUB C/
100 SUPERCONDUCTORS.
200 BLATTER, G.; DERSCH, H.; DUPRE, T.; RHYNER, J.; ZELLER, H.R.
220 ASEA BROWN BOVERI CORP. RES., BADEN, SWITZERLAND
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 APRIL 1989. VOL.3, NO.5, P.375-80, REF.9
350 ISSN 0217-9849
400 EXPERIMENTS ON CRITICAL CURRENT AND MAGNETIC PROPERTIES OF CERAMIC
400 YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / ARE DISCUSSED AND ANALYZED IN
400 TERMS OF AN ADAPTED CRITICAL STATE MODEL.
500 BARIUM COMPOUNDS; CERAMICS; CRITICAL CURRENTS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; MAGNETIC PROPERTIES OF SUBSTANCES; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; MAGNETIC PROPERTIES; CERAMIC;
510 CRITICAL CURRENT; ADAPTED CRITICAL STATE MODEL; YBA/SUB 2/CU/SUB
510 3/O/SUB 7- DELTA /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1334
AUTH = MINTS
DT = 02
KN = B40891304706
LG = ENGL
SN = ISSN 0217-9849
YR = 89
000 3385864
002 B40891304706
010 JOURNAL PAPER; THEORETICAL.
100 MAGNETIZATION OF ANISOTROPIC TYPE II SUPERCONDUCTORS.
200 MINTS, R.G.
220 INST. FOR HIGH TEMP., MOSCOW, USSR
310 MOD. PHYS. LETT. B (SINGAPORE)
330 10 APRIL 1989. VOL.3, NO.5, P.405-8, REF.3
350 ISSN 0217-9849
400 THE AUTHOR CONSIDERS THE MAGNETIZATION CURVE OF ANISOTROPIC
400 SUPERCONDUCTORS. HE DEALS WITH THE MAGNETIC MOMENT OF UNIAXIAL LONDON
400 SUPERCONDUCTOR IN THE INTERVAL H/SUB CL/77 K. RESISTIVITY MEASUREMENTS HINT AT THE EXISTENCE OF TWO
400 SUPERCONDUCTING PHASES. ESR INVESTIGATIONS REVEALED A BASELINE
400 HYSTERESIS, DEPENDING ON THE ACTUAL VALUE OF X.
500 BARIUM COMPOUNDS; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE
500 SEMICONDUCTORS AND INSULATORS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 MATERIALS PREPARATION; PARAMAGNETIC RESONANCE; SUPERCONDUCTING
500 TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; RESISTIVITY; TWO-STEP SYNTHESIS
510 ROUTE; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / SUPERCONDUCTING PHASE;
510 MACROSCOPIC SUPERCONDUCTIVITY; ESR; BASELINE HYSTERESIS; 77 K;
510 Y-BA-CU-O COMPOUNDS.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 7.7 E+01 K.
DOCUMENT= 1343
AUTH = CHEN
DT = 02
KN = B40891304979
LG = CHIN
SN = ISSN 1000-3258
YR = 89
000 3386137
002 B40891304979
010 JOURNAL PAPER; THEORETICAL.
100 INVESTIGATION OF SUPERCONDUCTING THERMODYNAMIC CRITICAL FIELD IN THE
100 KONDO LATTICE.
200 CHEN CHANFENG
220 DEPT. OF PHYS., BEIJING UNIV., CHINA
310 CHIN. J. LOW TEMP. PHYS. (CHINA)
330 JAN. 1989. VOL.11, NO.1, P.38-43, REF.5. (IN CHINESE)
350 ISSN 1000-3258, CODEN DWXUES
400 THE BEHAVIOUR OF THE SUPERCONDUCTING THERMODYNAMIC CRITICAL FIELD IN
400 THE KONDO LATTICE HAS BEEN INVESTIGATED IN A TWO-BAND QUASIPARTICLE
400 MODEL. THE AUTHOR HAS INTRODUCED PHENOMENOLOGICALLY THE EFFECTIVE
400 ATTRACTIVE INTERACTIONS BETWEEN THE QUASIPARTICLES AND CALCULATED THE
400 DIFFERENCE OF THE THERMODYNAMIC FUNCTIONS BETWEEN SUPERCONDUCTING AND
400 NORMAL STATES IN VIEW OF THE SELF-CONSISTENT EQUATIONS OF THE TWO
400 SUPERCONDUCTING ORDER PARAMETERS OF THE SYSTEM, AND HENCE OBTAINED
400 THE EXPRESSION FOR THE SUPERCONDUCTING THERMODYNAMIC CRITICAL FIELD
400 IN THE KONDO LATTICE. THE AUTHOR ALSO DISCUSSED THE THEORETICAL
400 RESULTS IN CONNECTION WITH RELEVANT EXPERIMENTS OF THE HEAVY-FERMION
400 SUPERCONDUCTORS CECU/SUB 2/SI/SUB 2/, UBE/SUB 10/, AND UPT/SUB 2/.
500 HEAVY FERMION SUPERCONDUCTORS; KONDO EFFECT; SUPERCONDUCTING CRITICAL
500 FIELD; THERMODYNAMIC PROPERTIES.
510 SUPERCONDUCTING THERMODYNAMIC CRITICAL FIELD; KONDO LATTICE; TWO-BAND
510 QUASIPARTICLE MODEL; EFFECTIVE ATTRACTIVE INTERACTIONS; THERMODYNAMIC
510 FUNCTIONS; NORMAL STATES; SELF-CONSISTENT EQUATIONS; SUPERCONDUCTING
510 ORDER PARAMETERS; CECU/SUB 2/SI/SUB 2/; UBE/SUB 10/; UPT/SUB 2/.
550 CECU2SI2/SS CU2/SS SI2/SS CE/SS CU/SS SI/SS; UBE10/BIN BE10/BIN
550 BE/BIN U/BIN; UPT2/BIN PT2/BIN PT/BIN U/BIN.
DOCUMENT= 1344
AUTH = HE
DT = 02
KN = B40891304980
LG = CHIN
SN = ISSN 1000-3258
YR = 89
000 3386138
002 B40891304980
010 JOURNAL PAPER; THEORETICAL, EXPERIMENTAL.
100 THE ELECTRONIC STRUCTURE AND SUPERCONDUCTING TRANSITION TEMPERATURE
100 IN METALLIC GLASSES ZR/SUB 76/(FE/SUB X/CU/SUB 1-X/)/SUB 24/.
200 HE ZHENHUI / WU JIANXIN; ZHANG QIRUI
220 UNIV. OF SCI. ? TECHNOL. OF CHINA, HEFEI, CHINA
310 CHIN. J. LOW TEMP. PHYS. (CHINA)
330 JAN. 1989. VOL.11, NO.1, P.44-8, REF.12. (IN CHINESE)
350 ISSN 1000-3258, CODEN DWXUES
400 THE X-RAY PHOTOELECTRON SPECTRUM (XPS) AND SUPERCONDUCTING TRANSITION
400 TEMPERATURE T/SUB C/ HAVE BEEN MEASURED FOR THE METALLIC GLASS ZR/SUB
400 76/(FE/SUB X/CU/SUB 1-/X)/SUB 24/. THE RESULTS SHOW THAT, AS THE
400 AMOUNT OF FE INCREASES, THE DENSITY OF ELECTRONIC STATES AT FERMI
400 LEVEL INCREASES WHILE T/SUB C/ DECREASES. THIS INDICATES THAT THE
400 SPIN FLUCTUATION IS AN IMPORTANT FACTOR IN T/SUB C/ DETERMINATION.
400 THE MCMILLAN EQUATION HAS BEEN USED TO ESTIMATE THE BEHAVIOR OF T/SUB
400 C/ IN THIS SYSTEM, WHICH HAS BEEN COMPARED WITH THE EXPERIMENTAL
400 RESULTS.
500 COPPER ALLOYS; ELECTRON ENERGY STATES OF AMORPHOUS SOLIDS; ELECTRONIC
500 DENSITY OF STATES; FERMI LEVEL; IRON ALLOYS; METALLIC GLASSES;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; TYPE II SUPERCONDUCTORS;
500 X-RAY PHOTOELECTRON SPECTRA; ZIRCONIUM ALLOYS.
510 XPS; ELECTRONIC STRUCTURE; SUPERCONDUCTING TRANSITION TEMPERATURE;
510 METALLIC GLASSES; X-RAY PHOTOELECTRON SPECTRUM; DENSITY OF ELECTRONIC
510 STATES; FERMI LEVEL; SPIN FLUCTUATION; MCMILLAN EQUATION; ZR/SUB
510 76/(FE/SUB X/CU/SUB 1-X/)/SUB 24/.
550 ZR76FECU/SS ZR76/SS CU/SS FE/SS ZR/SS.
DOCUMENT= 1345
AUTH = NAVEH
DT = 02
KN = B40891305064
LG = ENGL
SN = ISSN 0025-5408
YR = 89
000 3386222
002 B40891305064
010 JOURNAL PAPER; EXPERIMENTAL.
100 ON THE PREPARATION OF YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ CERAMIC
100 HIGH-TEMPERATURE SUPERCONDUCTOR.
200 NAVEH, J.; PELLY, I.
220 DEPT. OF GEOL. ? MINERALOGY, BEN GURION UNIV. OF THE NEGEV, BEER
220 SHEVA, ISRAEL
310 MATER. RES. BULL. (USA)
330 MARCH 1989. VOL.24, NO.3, P.283-7, REF.23
350 ISSN 0025-5408, CODEN MRBUAC
400 THERE ARE NOW MANY ROUTES TO THE SYNTHESIS OF YBA/SUB 2/CU/SUB
400 3/O/SUB 7-X/. THE METHOD OF MIXING THE OXIDES AND HEATING THEM TO 950
400 DEGREES C IS ONE OF THE EARLIEST AND SEEMS TO BE THE CRUDEST.
400 NEVERTHELESS IT SEEMS THAT THIS IS STILL THE MOST WIDESPREAD METHOD
400 USED. SEVERAL HIGH TEMPERATURE AND OTHER ANALYTICAL TECHNIQUES WERE
400 PERFORMED ON THE SUPERCONDUCTOR PREPARED FROM BACO/SUB 3/, Y/SUB
400 2/O/SUB 3/ AND CUO. IT WAS FOUND THAT THE SUPERCONDUCTOR RETAINED
400 SIGNIFICANT AMOUNTS OF CARBONATE UP TO TEMPERATURES ABOVE 1200
400 DEGREES C. BACO/SUB 3/ SHOULD BE HEATED SEPARATELY TO ABOUT 1400
400 DEGREES C BEFORE MIXING WITH THE OTHER OXIDES, TO PREPARE THE
400 SUPERCONDUCTOR AT 950 DEGREES C.
500 BARIUM COMPOUNDS; CERAMICS; HIGH-TEMPERATURE SUPERCONDUCTORS; POWDER
500 TECHNOLOGY; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; PREPARATION; CERAMIC
510 HIGH-TEMPERATURE SUPERCONDUCTOR; SYNTHESIS; CARBONATE; 1400 DEGC; 950
510 DEGC; YBA/SUB 2/CU/SUB 3/O/SUB 7-X/; Y/SUB 2/O/SUB 3/; CUO; BACO/SUB
510 3/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; Y2O3/BIN O3/BIN
550 Y2/BIN O/BIN Y/BIN; CUO/BIN CU/BIN O/BIN; BACO3/SS CO3/SS BA/SS O3/SS
550 C/SS O/SS.
560 TEMPERATURE 1.67 E+03 K; TEMPERATURE 1.22 E+03 K.
DOCUMENT= 1346
AUTH = GOPALAKR
DT = 02
KN = B40891305065
LG = ENGL
SN = ISSN 0025-5408
YR = 89
000 3386223
002 B40891305065
010 JOURNAL PAPER; EXPERIMENTAL.
100 PROPERTIES AND STRUCTURES OF R/SUB 2-X/A/SUB X/CUO/SUB 4/ PHASES:
100 R=LA, PR AND ND; A=SR, PB AND CD.
200 GOPALAKRISHNAN, J. / SUBRAMANIAN, M.A.; TORARDI, C.C.
220 CENTRAL RES. ? DEV. DEPT., E. I. DU PONT DE NEMOURS ? CO.,
220 WILMINGTON, DE, USA
310 MATER. RES. BULL. (USA)
330 MARCH 1989. VOL.24, NO.3, P.321-30, REF.23
350 ISSN 0025-5408, CODEN MRBUAC
400 THE R/SUB 2/CUO/SUB 4/ PHASES FOR R=PR AND ND WERE PREPARED AND FOUND
400 TO BE SEMICONDUCTING AS PREVIOUSLY REPORTED. CRYSTAL STRUCTURES OF
400 BOTH COMPOUNDS WERE EXAMINED BY PROFILE REFINEMENTS OF NEUTRON POWDER
400 DIFFRACTION DATA. A SERIES OF PHASES OF THE TYPE R/SUB 2-X/SR/SUB
400 X/CUO/SUB 4/ WHICH ARE ISOSTRUCTURAL WITH R/SUB 2/CUO/SUB 4/ FOR X UP
400 TO 0.1 WERE PREPARED AND FOUND TO REMAIN SEMICONDUCTING. CHEMICAL
400 ANALYSIS INDICATES THE PRESENCE OF CU/SUP III/, YET THESE MATERIALS
400 ARE NOT SUPERCONDUCTING. THIS SUPPORTS THE VIEW THAT R/SUB 2/CUO/SUB
400 4/ PHASES SHOULD BE REGARDED AS MOTT INSULATORS. A NEW SERIES OF
400 PHASES POSSESSING THE TETRAGONAL K/SUB 2/NIF/SUB 4/ STRUCTURE APPEAR
400 IN THE PR/SUB 2-X/SR/SUB X/CUO/SUB 4/ SYSTEM FOR 1.00.01 IS LOWER THAN ORTHORHOMBIC.
500 ELECTRON-PHONON INTERACTIONS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 LANTHANUM COMPOUNDS; RAMAN SPECTRA OF INORGANIC SOLIDS; SOFT MODES;
500 STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; RAMAN SPECTRA; TWO-PHONON PEAKS;
510 TWO-MAGNON PEAK; ANTIFERROMAGNETIC SPIN ORDER; ELECTRON-PHONON
510 INTERACTION; SOFT MODE; ORTHORHOMBIC-TETRAGONAL PHASE TRANSITION;
510 (LA/SUB 1-X/SR/SUB X/)/SUB 2/CUO/SUB 4/ SINGLE CRYSTALS.
550 LASRCUO4/SS CU/SS LA/SS O4/SS SR/SS O/SS.
DOCUMENT= 1407
AUTH = TARASCON
DT = 02
KN = B40891306876
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388034
002 B40891306876
010 JOURNAL PAPER; EXPERIMENTAL.
100 BISMUTH CUPRATE HIGH-T/SUB C/ SUPERCONDUCTORS USING CATIONIC
100 SUBSTITUTION.
200 TARASCON, J.-M.; BARBOUX, P.; HULL, G.W. / RAMESH, R.; GREENE, L.H.;
200 GIROUD, M.; HEGDE, M.S.; MCKINNON, W.R.
220 BELLCORE, RED BANK, NJ, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 MARCH 1989. VOL.39, NO.7, P.4316-26, REF.37
350 ISSN 0163-1829, CODEN PRBMDO
400 THE BI/SUB 4/SR/SUB 4/CA/SUB 2-X/R/SUB X/CU/SUB 4/O/SUB Y/ MATERIALS
400 (R IS A RARE-EARTH ELEMENT) WERE STUDIED TO DETERMINE THEIR
400 STRUCTURAL AND PHYSICAL PROPERTIES. FOR MOST OF THE RARE-EARTH
400 ELEMENTS, A COMPLETE SOLID SOLUTION EXISTS UP TO X=2. BELOW X=0.5,
400 T/SUB C/ IS NOT AFFECTED AND FOR EACH ADDED RARE-EARTH ELEMENT THE
400 AUTHORS FIND THAT ABOUT 0.5 OXYGEN ATOM IS ADDED TO THE STRUCTURE.
400 HOWEVER, THE STRUCTURAL MODULATION OBSERVED ALONG THE B AXIS FOR THE
400 UNDOPED MATERIAL PERSISTS AND REMAINS OF THE SAME AMPLITUDE FOR
400 RARE-EARTH-DOPED SAMPLES. WHEN MORE THAN ONE R (X>OR=1) IS
400 SUBSTITUTED, T/SUB C/ IS DEPRESSED AND THE COMPOUND BECOMES
400 SEMICONDUCTING BEYOND X=1.5. THE DEPRESSION IN T/SUB C/ FROM 85 K
400 (X=0) TO LESS THAN 4.2 K (X=1.5) CORRELATES TO A DECREASE IN THE
400 FORMAL VALENCE OF COPPER AND IS INDEPENDENT WHETHER THE RARE-EARTH
400 ELEMENT IS MAGNETIC OR NONMAGNETIC. NO EVIDENCE FOR MAGNETIC ORDERING
400 OVER THE RANGE OF TEMPERATURE 1.7-400 K HAS BEEN OBSERVED IN ALL THE
400 SUBSTITUTED COMPOUNDS. THE SUBSTITUTION FOR CU BY 3D METALS OR FOR SR
400 BY RARE-EARTH ELEMENTS FAILS FOR THE 85-K BI PHASE BUT SUCCEEDS FOR
400 THE 10-K BI PHASE. CONSEQUENTLY, THE FOLLOWING SERIES BI/SUB 2/SR/SUB
400 2/CU/SUB 1-X/M/SUB X/O/SUB Y/ (M=FE, CO) AND BI/SUB 2/RCACUO/SUB Y/
400 (R=LA, PR, ND, SM) WERE MADE FOR STUDY. THESE SUBSTITUTIONS RESULT IN
400 AN UPTAKE OF OXYGEN (0.5 FOR EACH SUBSTITUTED ELEMENT). BUT THE
400 MATERIALS BECOME SEMICONDUCTING EVEN THOUGH THE FORMAL VALENCE OF CU
400 REMAINS GREATER THAN 2. AN ANTIFERROMAGNETIC TRANSISTIONAT 140 K HAS
400 BEEN FOUND FOR THE CO SAMPLE.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; IMPURITIES; LANTHANUM COMPOUNDS; NEODYMIUM
500 COMPOUNDS; PRASEODYMIUM COMPOUNDS; SAMARIUM COMPOUNDS; SOLID
500 SOLUTIONS; STRONTIUM COMPOUNDS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTOR; TRANSITION TEMPERATURE; CATIONIC
510 SUBSTITUTION; BI/SUB 4/SR/SUB 4/CA/SUB 2-X/R/SUB X/CU/SUB 4/O/SUB Y/;
510 SOLID SOLUTION; STRUCTURAL MODULATION; SEMICONDUCTING; MAGNETIC
510 ORDERING; ANTIFERROMAGNETIC TRANSISTION; 1.7 TO 400 K; BI/SUB
510 2/SR/SUB 2/CU/SUB 1-X/FE/SUB X/O/SUB Y/; BI/SUB 2/LACACUO/SUB Y/;
510 BI/SUB 2/SMCACUO/SUB Y/; BI/SUB 2/SR/SUB 2/CU/SUB 1-X/CO/SUB X/O/SUB
510 Y/; BI/SUB 2/PRCACUO/SUB Y/; BI/SUB 2/NDCACUO/SUB Y/.
550 BI2SR2CUFEO/SS BI2/SS SR2/SS BI/SS CU/SS FE/SS SR/SS O/SS;
550 BI2LACACUO/SS BI2/SS BI/SS CA/SS CU/SS LA/SS O/SS; BI2SMCACUO/SS
550 BI2/SS BI/SS CA/SS CU/SS SM/SS O/SS; BI2SR2CUCOO/SS BI2/SS SR2/SS
550 BI/SS CO/SS CU/SS SR/SS O/SS; BI2PRCACUO/SS BI2/SS BI/SS CA/SS CU/SS
550 PR/SS O/SS; BI2NDCACUO/SS BI2/SS BI/SS CA/SS CU/SS ND/SS O/SS.
560 TEMPERATURE 1.7 E+00 TO 4.0 E+02 K.
DOCUMENT= 1408
AUTH = THURSTON
DT = 02
KN = B40891306877
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388035
002 B40891306877
010 JOURNAL PAPER; EXPERIMENTAL.
100 NEUTRON SCATTERING STUDY OF SOFT OPTICAL PHONONS IN LA/SUB 2-X/SR/SUB
100 X/CUO/SUB 4-Y/.
200 THURSTON, T.R.; BIRGENEAU, R.J.; GABBE, D.R.; JENSSEN, H.P.; KASTNER,
200 M.A.; PICONE, P.J.; PREYER, N.W. / AXE, J.D.; BONI, P.; SHIRANE, G.;
200 SATO, M.; FUKUDA, K.; SHAMOTO, S.
220 CENTER FOR MATER. SCI. ? ENG., MIT, CAMBRIDGE, MA, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 MARCH 1989. VOL.39, NO.7, P.4327-33, REF.37
350 ISSN 0163-1829, CODEN PRBMDO
400 THE SOFT OPTICAL PHONONS ASSOCIATED WITH THE
400 TETRAGONAL-TO-ORTHORHOMBIC STRUCTURAL PHASE TRANSITION IN LA/SUB
400 2-X/SR/SUB X/CUO/SUB 4-Y/ HAVE BEEN INVESTIGATED USING
400 INELASTIC-NEUTRON-SCATTERING TECHNIQUES. SINGLE CRYSTALS WITH SR
400 CONCENTRATIONS OF X=0, 0.08, AND 0.14 WERE STUDIED. BOTH BRANCHES OF
400 THE DOUBLY DEGENERATE X-POINT PHONON WHICH GO SOFT AT THE
400 TETRAGONAL-TO-ORTHORHOMBIC TRANSITION HAVE BEEN OBSERVED IN THE
400 ORTHORHOMBIC PHASE. IN ALL THREE SAMPLES ONE BRANCH HARDENS, WHILE
400 THE OTHER REMAINS RELATIVELY SOFT WITH BEHAVIOR INDICATIVE OF A
400 FURTHER INCIPIENT STRUCTURAL PHASE TRANSITION. THE AUTHORS IDENTIFY
400 THE HARD AND SOFT BRANCHES OF THE ORTHORHOMBIC PHASE AS ZONE-CENTER
400 AND ZONE-BOUNDARY PHONONS, RESPECTIVELY. THE ZONE-CENTER MODE HAS
400 A/SUB G/ SYMMETRY AND IS, CONSEQUENTLY, RAMAN ACTIVE. THE RELATION OF
400 THESE MEASUREMENTS TO OTHER STRUCTURAL PROPERTIES AND TO THE
400 SUPERCONDUCTIVITY IN LA/SUB 2-X/SR/SUB X/CUO/SUB 4-Y/ IS DISCUSSED.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM COMPOUNDS; NEUTRON
500 DIFFRACTION EXAMINATION OF MATERIALS; SOFT MODES; SOLID-STATE PHASE
500 TRANSFORMATIONS; STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ZONE CENTRE MODE; ZONE BOUNDARY
510 MODE; SOFT OPTICAL PHONONS; STRUCTURAL PHASE TRANSITION;
510 INELASTIC-NEUTRON-SCATTERING TECHNIQUES; DOUBLY DEGENERATE X-POINT
510 PHONON; LA/SUB 2-X/SR/SUB X/CUO/SUB 4-Y/.
550 LASRCUO/SS CU/SS LA/SS SR/SS O/SS.
DOCUMENT= 1409
AUTH = JAIN
DT = 02
KN = B40891306878
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388036
002 B40891306878
010 JOURNAL PAPER; THEORETICAL.
100 DYNAMIC SPIN SUSCEPTIBILITY IN THE RESONANT-VALENCE-BOND STATE IN
100 HIGH-T/SUB C/ SUPERCONDUCTORS.
200 JAIN, K.P. / RAY, D.K.
220 DEPT. OF THEOR. PHYS., OXFORD UNIV., UK
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 MARCH 1989. VOL.39, NO.7, P.4339-42, REF.10
350 ISSN 0163-1829, CODEN PRBMDO
400 AN APPROXIMATE EXPRESSION HAS BEEN DERIVED FOR THE WAVE NUMBER AND
400 FREQUENCY-DEPENDENT SPIN SUSCEPTIBILITY CHI (Q, OMEGA ) FOR A SYSTEM
400 OF STRONGLY INTERACTING ELECTRONS WHEN THE CHARGE AND SPIN DEGREES OF
400 FREEDOM CAN BE SEPARATED. THIS EXPRESSION HAS CONTRIBUTIONS FROM
400 PARTICLE-HOLE EXCITATIONS ACROSS THE PSEUDO-FERMI SURFACE OF THE
400 QUANTUM SPIN FLUIDS AS WELL AS FROM PAIR EXCITATIONS.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SPIN DYNAMICS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; HUBBARD HAMILTONIAN;
510 RESONANT-VALENCE-BOND STATE; WAVE NUMBER; SPIN SUSCEPTIBILITY;
510 STRONGLY INTERACTING ELECTRONS; PARTICLE-HOLE EXCITATIONS;
510 PSEUDO-FERMI SURFACE; QUANTUM SPIN FLUIDS; PAIR EXCITATIONS.
DOCUMENT= 1410
AUTH = CHEN
DT = 02
KN = B40891306879
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388037
002 B40891306879
010 JOURNAL PAPER; EXPERIMENTAL.
100 INCOMMENSURATE SUPERLATTICES IN THE PB-SUBSTITUTED BI-SR-CA-CU-O
100 SUPERCONDUCTORS.
200 CHEN, C.H.; WERDER, D.J.; ESPINOSA, G.P.; COOPER, A.S.
220 AT?T BELL LABS., MURRAY HILL, NJ, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 MARCH 1989. VOL.39, NO.7, P.4686-9, REF.10
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHORS HAVE STUDIED INCOMMENSURATE SUPERLATTICE MODULATIONS IN
400 THE PB-SUBSTITUTED BI-SR-CA-CU-O SINGLE CRYSTALLINE SUPERCONDUCTORS
400 BY ELECTRON DIFFRACTION AND ELECTRON MICROSCOPY. NEW INCOMMENSURATE
400 SUPERLATTICE MODULATIONS CHARACTERIZED BY A WAVE VECTOR Q=(0, 1/P, 0)
400 (WITH P>6) HAVE BEEN OBSERVED. THE INCOMMENSURATE MODULATION ARISES
400 FROM CHEMICAL SUBSTITUTIONS WITH A SIZABLE LATTICE DISPLACIVE
400 DISTORTION.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; ELECTRON DIFFRACTION
500 EXAMINATION OF MATERIALS; ELECTRON MICROSCOPE EXAMINATION OF
500 MATERIALS; HIGH-TEMPERATURE SUPERCONDUCTORS; IMPURITIES; LEAD
500 COMPOUNDS; STRONTIUM COMPOUNDS; SUPERLATTICES.
510 HIGH TEMPERATURE SUPERCONDUCTOR; INCOMMENSURATE SUPERLATTICE
510 MODULATIONS; ELECTRON DIFFRACTION; ELECTRON MICROSCOPY; LATTICE
510 DISPLACIVE DISTORTION; BI-PB-SR-CA-CU-O.
550 BIPBSRCACUO/SS BI/SS CA/SS CU/SS PB/SS SR/SS O/SS.
DOCUMENT= 1411
AUTH = ITOH
DT = 02
KN = B40891306880
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388038
002 B40891306880
010 JOURNAL PAPER; EXPERIMENTAL.
100 SUPERCONDUCTIVITY IN THE TL-ND-SR-CU-O AND THE TL-PB-ND-SR-CU-O
100 SYSTEMS.
200 ITOH, T.; UCHIKAWA, H.
220 CERAMICS RES. LAB., ONODA CEMENT CO. LTD., TOKYO, JAPAN
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 MARCH 1989. VOL.39, NO.7, P.4690-2, REF.9
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHORS REPORT EVIDENCE FOR SUPERCONDUCTIVITY IN THE
400 TL-ND-SR-CU-O AND THE TL-PB-ND-SR-CU-O SYSTEMS. THE HIGHEST ONSET
400 TEMPERATURE IS OBSERVED AT 44 K IN THE TL-PB-ND-SR-CU-O SYSTEM. THE
400 SUPERCONDUCTIVITY OF THE SAMPLES WAS CONFIRMED BY BOTH THE
400 RESISTIVITY AND AC SUSCEPTIBILITY MEASUREMENTS. INTRODUCTION OF PBO
400 INTO THE TL-ND-SR-CU-O SYSTEM STABILIZES THE SUPERCONDUCTING PHASE,
400 AS WAS OBSERVED IN THE BI-SR-CA-CU-O OR THE TL-SR-CA-CU-O SYSTEM. THE
400 SUPERCONDUCTING PROPERTIES IN THE SYSTEM TL-PB-L-SR-CU-O WITH L
400 DENOTING LANTHANIDE ELEMENTS OTHER THAN ND ARE ALSO DISCUSSED.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LEAD COMPOUNDS; MAGNETIC
500 SUSCEPTIBILITY; NEODYMIUM COMPOUNDS; STRONTIUM COMPOUNDS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; THALLIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ONSET TEMPERATURE; AC
510 SUSCEPTIBILITY; 44 K; TL-ND-SR-CU-O; TL-PB-ND-SR-CU-O.
550 TLNDSRCUO/SS CU/SS ND/SS SR/SS TL/SS O/SS; TLPBNDSRCUO/SS CU/SS ND/SS
550 PB/SS SR/SS TL/SS O/SS.
560 TEMPERATURE 4.4 E+01 K.
DOCUMENT= 1412
AUTH = BOURGAUL
DT = 02
KN = B40891306882
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388040
002 B40891306882
010 JOURNAL PAPER; EXPERIMENTAL.
100 MODIFICATIONS OF THE PHYSICAL PROPERTIES OF THE HIGH-T/SUB C/
100 SUPERCONDUCTORS YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / (0.1> EPSILON
400 INFINITY , THE NOTION THAT THEIR CHARGE CARRIERS ARE SINGLET LARGE
400 BIPOLARONS IS A REAL POSSIBILITY. ESTIMATING THE TRANSITION
400 TEMPERATURE FOR BIPOLARONIC SUPERCONDUCTIVITY AS THE TEMPERATURE OF
400 THE BOSE-EINSTEIN CONDENSATION, TRANSITION TEMPERATURES OF THE ORDER
400 OF THOSE FOUND IN THE HIGH-TEMPERATURE SUPERCONDUCTORS ARE REASONABLY
400 OBTAINED. FURTHERMORE, IF, AS ENVISIONED IN THE CUO/SUB 2/-BASED
400 MATERIALS, THE MASS OF THE LARGE BIPOLARON IS DOMINATED BY THE
400 SHORT-RANGE INTERACTION OF THE CARRIER OCCUPYING OXYGEN SITES WITH
400 THE SURROUNDING (RELATIVELY HEAVY) CATIONS, THERE IS ONLY A SLIGHT
400 DEPENDENCE OF THE TRANSITION TEMPERATURE ON ISOTOPIC SUBSTITUTIONS
400 FOR THE SOLID'S OXYGEN ATOMS. FINALLY, THE TRANSITION TEMPERATURE
400 INCREASES LINEARLY WITH THE THICKNESS OF THE DISK-SHAPED BIPOLARON
400 (THE NUMBER OF CONTIGUOUS CUO/SUB 2/ SHEETS) UNTIL A LIMITING VALUE
400 IS ACHIEVED WHEN THE BIPOLARON'S SHAPE APPROACHES THREE
400 DIMENSIONALITY. THESE FINDINGS ARE CONSISTENT WITH THE GENERAL
400 FEATURES OF THE HIGH-TEMPERATURE SUPERCONDUCTING MATERIALS.
500 ELECTRON-PHONON INTERACTIONS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 POLARONS; SUPERCONDUCTING TRANSITION TEMPERATURE.
510 SINGLET BIPOLARONS; ADIABATIC APPROXIMATION; ELECTRON-LATTICE
510 INTERACTION; HIGH-FREQUENCY DIELECTRIC CONSTANTS; HIGH-TEMPERATURE
510 SUPERCONDUCTORS; TRANSITION TEMPERATURE; BIPOLARONIC
510 SUPERCONDUCTIVITY; BOSE-EINSTEIN CONDENSATION; CUO/SUB 2/-BASED
510 MATERIALS.
DOCUMENT= 1417
AUTH = FARNETH
DT = 02
KN = B40891306887
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388045
002 B40891306887
010 JOURNAL PAPER; THEORETICAL, EXPERIMENTAL.
100 MAGNETIC SUSCEPTIBILITY OF YBA/SUB 2/CU/SUB 3/O/SUB 6+X/: EFFECTS OF
100 SPIN FRUSTRATION AND CORRELATION.
200 FARNETH, W.E.; MCLEAN, R.S.; MCCARRON, E.M., III / ZUO, F.; LU, Y.;
200 PATTON, B.R.; EPSTEIN, A.J.
220 CENTRAL RES. ? DEV. DEPT., E.I. DU PONT DE NEMOURS ? CO., WILMINGTON,
220 DE, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.A, P.6594-9, REF.29
350 ISSN 0163-1829, CODEN PRBMDO
400 YBA/SUB 2/CU/SUB 3/O/SUB 6+X/ IS KNOWN TO UNDERGO A TRANSITION FROM A
400 MAGNETIC SEMICONDUCTOR TO A METALLIC HIGH-TEMPERATURE SUPERCONDUCTOR
400 AS THE OXYGEN CONTENT IS INCREASED FROM THE RANGE 0.0OR=0.03. THE SHARP STREAKS IN TEM
400 DIFFRACTION PATTERNS WERE INTERPRETED AS DUE TO THE TWIN BOUNDARY
400 LAYERS WHOSE THICKNESS VARIED FROM APPROXIMATELY 1 NM FOR THE PURE TO
400 APPROXIMATELY 2 FOR THE FE (X=0.02) CONTAINING SPECIMEN. A TWEED
400 STRUCTURE IN THE TEM IMAGE AND ASSOCIATED DIFFUSE STREAKS ALONG THE
400 (110) DIRECTIONS IN ELECTRON DIFFRACTION PATTERN APPEARED FOR
400 X>0.015. THIS OBSERVATION SUGGESTS THAT THE STRUCTURE CONSISTS OF
400 FINE (<5 NM) ORTHORHOMBIC DOMAINS, EACH DOMAIN HAVING THE TWINLIKE
400 CRYSTALLOGRAPHIC RELATION WITH ITS NEIGHBORS. RIETVELD REFINEMENT OF
400 POWDER NEUTRON DIFFRACTION FOR X=0.10 AND 0.167 DETERMINED THAT FE
400 SUBSTITUTED PRIMARILY ON THE CU 'CHAIN' SITE, AND FOR EVERY TWO ATOMS
400 OF FE SUBSTITUTED, APPROXIMATELY ONE EXTRA OXYGEN IS INCORPORATED IN
400 THE CU-O PLANE.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; IMPURITIES;
500 LATTICE CONSTANTS; SUPERCONDUCTING TRANSITION TEMPERATURE;
500 TRANSMISSION ELECTRON MICROSCOPE EXAMINATION OF MATERIALS; TWIN
500 BOUNDARIES; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; TRANSITION TEMPERATURES; LATTICE
510 PARAMETERS; TWIN BOUNDARIES; TEM DIFFRACTION PATTERNS; POWDER NEUTRON
510 DIFFRACTION; 90 K; YBA/SUB 2/(CU/SUB 1-X/FE/SUB X/)/SUB 3/O/SUB 7-
510 DELTA /.
550 YBA2CUFEO/SS BA2/SS BA/SS CU/SS FE/SS O/SS Y/SS.
560 TEMPERATURE 9.0 E+01 K.
DOCUMENT= 1429
AUTH = YANG
DT = 02
KN = B40891306899
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388057
002 B40891306899
010 JOURNAL PAPER; EXPERIMENTAL.
100 VARIATION OF ELECTRONIC AND ATOMIC STRUCTURES IN YBA/SUB 2/(CU/SUB
100 1-X/FE/SUB X/)/SUB 3/O/SUB 7- DELTA /.
200 YANG, C.Y.; HEALD, S.M.; TRANQUADA, J.M.; YOUWEN XU; WANG, Y.L.;
200 MOODENBAUGH, A.R.; WELCH, D.O.; SUENAGA, M.
220 DEPT. OF APPL. SCI., BROOKHAVEN NAT. LAB., UPTON, NY, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.A, P.6681-9, REF.23
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHORS PRESENT X-RAY ABSORPTION SPECTROSCOPY MEASUREMENTS OF
400 YBA/SUB 2/(CU/SUB 1-X/FE/SUB X/)/SUB 3/O/SUB 7- DELTA /, X=0.015 TO
400 0.15. BOTH NEAR-EDGE FEATURES AND EXTENDED X-RAY-ABSORPTION
400 FINE-STRUCTURE (EXAFS) RESULTS DEMONSTRATE THAT FE PREFERENTIALLY
400 SUBSTITUTES FOR CU(1) ATOMS AT THE LINEAR-CHAIN SITE. THE
400 COMPOSITIONAL TREND OF THESE SAMPLES SHOWS THAT THE VALENCE STATE OF
400 FE (MAINLY +3, BUT THE POSSIBLE PRESENCE OF SMALL AMOUNTS OF +2 AND
400 +4 CANNOT BE RULED OUT) REMAINS THE SAME AND FE-O BOND LENGTHS CHANGE
400 MINIMALLY IN THE LIGHT OF CHANGES IN THE LATTICE PARAMETERS WITH
400 COMPOSITION. BECAUSE OF ITS SENSITIVITY TO COORDINATION GEOMETRY, THE
400 REDUCTION OF THE INTENSITY OF THE 1S TO 3D EDGE FEATURE INDICATES
400 THAT THE AVERAGE COORDINATION NUMBER OF FE NEAREST NEIGHBORS
400 INCREASES WITH INCREASING FE CONTENT. EXAFS DATA ANALYSIS ALSO FINDS
400 AN INCREASE IN THE NUMBER OF OXYGEN NEIGHBORS IN THE LINEAR-CHAIN
400 PLANE, INDICATING AN INTRODUCTION OF THE EXTRA OXYGEN ATOM ON THE
400 VACANCIES OF THE A AXIS. BASED ON STATISTICAL CONSIDERATIONS, THE
400 AUTHORS HAVE EXAMINED THE DISTRIBUTION OF THIS EXTRA OXYGEN ATOM AS
400 WELL AS THREE POSSIBLE FE SITE COORDINATION GEOMETRIES (FOURFOLD,
400 FIVEFOLD, AND SIXFOLD).
500 BARIUM COMPOUNDS; EXAFS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 IMPURITIES; LATTICE CONSTANTS; X-RAY ABSORPTION SPECTRA; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; X-RAY ABSORPTION SPECTROSCOPY;
510 EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE; EXAFS; VALENCE STATE;
510 LATTICE PARAMETERS; COORDINATION GEOMETRY; YBA/SUB 2/(CU/SUB
510 1-X/FE/SUB X/)/SUB 3/O/SUB 7- DELTA /.
550 YBA2CUFEO/SS BA2/SS BA/SS CU/SS FE/SS O/SS Y/SS.
DOCUMENT= 1430
AUTH = YVON
DT = 02
KN = B40891306900
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388058
002 B40891306900
010 JOURNAL PAPER; EXPERIMENTAL.
100 OXYGEN ISOTOPE EFFECT IN YBA/SUB 2/CU/SUB 3/O/SUB 7/ PREPARED BY
100 BURNING YBA/SUB 2/CU/SUB 3/ IN /SUP 16/O AND /SUP 18/O.
200 YVON, P.J.; SCHWARZ, R.B.; PIERCE, C.B. / BERNARDEZ, L.; CONNERS, A.;
200 MEISENHEIMER, R.
220 LOS ALAMOS NAT. LAB., NM, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.A, P.6690-3, REF.14
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHORS PREPARED YBA/SUB 2/CU/SUB 3/ POWDER BY BALL MILLING A 2:1
400 MOLAR MIXTURE OF THE INTERMETALLICS BACU AND CUY. THEY SYNTHESIZED
400 YBA/SUB 2/CU/SUB 3/(/SUP 16/O)/SUB 7-X/ AND YBA/SUB 2/CU/SUB 3/(/SUP
400 18/O)/SUB 7-X/ BY OXIDIZING THE YBA/SUB 2/CU/SUB 3/ POWDER IN /SUP
400 16/O AND /SUP 18/O. THE /SUP 16/O//SUP 18/O RATIOS WERE DETERMINED BY
400 LASER-IONIZATION AND SPUTTERING-IONIZATION MASS SPECTROSCOPY. THE
400 YBA/SUB 2/CU/SUB 3/(/SUP 16/O)/SUB 7-X/ SAMPLE HAD 99.8 AT.% /SUP
400 16/O, AND THE YBA/SUB 2/CU/SUB 3/(/SUP 18/O)/SUB 7-X/ SAMPLE HAD 96.5
400 AT.% /SUP 18/O. SUSCEPTIBILITY MEASUREMENTS OF THE SUPERCONDUCTING
400 TRANSITION TEMPERATURE (T/SUB C/=91.7 K FOR /SUP 16/O; HALF-POINT
400 TRANSITION AT 84 K) SHOW AN ISOTOPE EFFECT OF 0.4+OR-0.1 K.
500 BARIUM COMPOUNDS; CERAMICS; HIGH-TEMPERATURE SUPERCONDUCTORS; ISOTOPE
500 EFFECTS; SUPERCONDUCTING TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; BALL MILLING; LASER-IONIZATION;
510 SPUTTERING-IONIZATION MASS SPECTROSCOPY; SUPERCONDUCTING TRANSITION
510 TEMPERATURE; ISOTOPE EFFECT; 91.7 K; YBA/SUB 2/CU/SUB 3/O/SUB 7/.
550 YBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS.
560 TEMPERATURE 9.17 E+01 K.
DOCUMENT= 1431
AUTH = DE
DT = 02
KN = B40891306901
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388059
002 B40891306901
010 JOURNAL PAPER; EXPERIMENTAL.
100 ESR EXPERIMENTS AND SPECTRA SIMULATIONS IN YBA/SUB 2/CU/SUB 3/O/SUB
100 7-X/, Y/SUB 2/BACUO/SUB 5/, AND BACUO/SUB 2+X/.
200 DE MESQUITA, R.N.; CASTILHO, J.H.; BARBERIS, G.E.; RETTORI, C.;
200 TORRIANI, I.; DE LIMA, O.F.; GAMA, S.; JARDIM, R.F. / TERRILE, M.C.;
200 BASSO, H.; NASCIMENTO, O.R.
220 INST. DE FISICA 'GLEB WATAGHIN,' UNIV. ESTADUAL DE CAMPINAS, SAO
220 PAULO, BRAZIL
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.A, P.6694-9, REF.25
350 ISSN 0163-1829, CODEN PRBMDO
400 ROOM-TEMPERATURE X- AND Q-BAND ESR SPECTRA OF THE HIGH-T/SUB C/
400 SUPERCONDUCTOR YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ AND THE SEMICONDUCTORS
400 Y/SUB 2/BACUO/SUB 5/ AND BACUO/SUB 2+X/ ARE STUDIED EXPERIMENTALLY
400 AND THEORETICALLY BY MEASURING, CALCULATING, AND FITTING THE POWDER
400 SPECTRA CORRESPONDING TO AN ANISOTROPIC ZEEMAN HAMILTONIAN FOR CU/SUP
400 2+/ IN ORTHORHOMBIC AND TETRAGONAL LOCAL SYMMETRIES. ESR AND X-RAY
400 STUDIES IN THEIR CORRESPONDING OXYGEN-DEFICIENT STOICHIOMETRIES,
400 OBTAINED BY HEAT TREATMENT UNDER VACUUM, WERE ALSO DONE. THE RESULTS
400 SUPPORT THOSE OF BOWDEN ET AL. (1987) IN RBA/SUB 2/CU/SUB 3/O/SUB
400 7-X/ (R=Y, EU), INDICATING THAT THE CU(1) AND CU(2) ATOMS IN THE PURE
400 YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ PHASE ARE NOT ESR ACTIVE AND THE SMALL
400 RESONANCE OBSERVED IN THESE COMPOUNDS COMES FROM OTHER RESIDUAL
400 PHASES. THE PUREST YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ SAMPLES THAT THE
400 AUTHORS WERE ABLE TO PREPARE STILL HAVE 0.1-0.5% MASS FRACTION OF
400 OTHER RESIDUAL COPPER COMPOUNDS WHICH ARE RESPONSIBLE FOR THE
400 OBSERVED RESONANCE.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; PARAMAGNETIC
500 RESONANCE OF IRON GROUP IONS AND IMPURITIES; SEMICONDUCTOR MATERIALS;
500 YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ESR SPECTRA; SEMICONDUCTORS;
510 ANISOTROPIC ZEEMAN HAMILTONIAN; X-RAY STUDIES; YBA/SUB 2/CU/SUB
510 3/O/SUB 7-X/; Y/SUB 2/BACUO/SUB 5/; BACUO/SUB 2+X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; Y2BACUO5/SS BA/SS
550 CU/SS O5/SS Y2/SS O/SS Y/SS; BACUO/SS BA/SS CU/SS O/SS.
DOCUMENT= 1432
AUTH = ALIGIA
DT = 02
KN = B40891306902
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388060
002 B40891306902
010 JOURNAL PAPER; THEORETICAL.
100 ELECTRONICALLY DRIVEN INSTABILITIES OF LA/SUB 2-X/M/SUB X/CUO/SUB 4/.
200 ALIGIA, A.A.
220 CENTRO ATOMICO BARILOCHE, RIO NEGRO, ARGENTINA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.A, P.6700-7, REF.38
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHOR HAS STUDIED THE ELECTRONIC STRUCTURE AND MAGNETIC AND
400 STRUCTURAL INSTABILITIES OF LA/SUB 2-X/M/SUB X/CUO/SUB 4-Y/ (M=SR,
400 BA) USING A TIGHT-BINDING MODEL AND THE ELECTRON-PHONON INTERACTION
400 DERIVED FROM IT. HE INCLUDES BOTH THE E/SUB G/ ORBITALS OF CU ATOMS
400 AND THE P ORBITALS OF BOTH INEQUIVALENT O ATOMS. FOR HOPPING
400 PARAMETERS DERIVED FROM BAND-STRUCTURE CALCULATIONS AND A CU
400 INTRA-ATOMIC COULOMB REPULSION U OF 2.5 EV, ANTIFERROMAGNETIC
400 INSTABILITIES ARE FAVORED WHEN THE NUMBER OF ELECTRONS IN THE SYSTEM
400 IS IN EXCESS WITH RESPECT TO THE STOICHIOMETRIC COMPOUND, WHILE
400 STRUCTURAL INSTABILITIES, SUCH AS DIMERIZATION OF CU ATOMS, ARE MORE
400 LIKELY TO OCCUR FOR ELECTRONIC DEFICIENT COMPOUNDS, FOR WHICH THE
400 INTERACTION OF THE ELECTRONS WITH HIGH-FREQUENCY ZONE-BOUNDARY PHONON
400 MODES HAS A MAXIMUM AS A FUNCTION OF THE COMPOSITION PARAMETER. FOR
400 U>3 EV, THE SYSTEM IS UNSTABLE AGAINST ANTIFERROMAGNETISM FOR ALL
400 COMPOSITIONS OF INTEREST.
500 BARIUM COMPOUNDS; ELECTRON ENERGY STATES (CONDENSED MATTER);
500 ELECTRON-PHONON INTERACTIONS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 LANTHANUM COMPOUNDS; STRONTIUM; TIGHT-BINDING CALCULATIONS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ELECTRONIC STRUCTURE; TIGHT-BINDING
510 MODEL; ELECTRON-PHONON INTERACTION; HOPPING PARAMETERS; INTRA-ATOMIC
510 COULOMB REPULSION; ANTIFERROMAGNETIC INSTABILITIES; STRUCTURAL
510 INSTABILITIES; ZONE-BOUNDARY PHONON MODES; LA/SUB 2-X/SR/SUB
510 X/CUO/SUB 4/; LA/SUB 2-X/BA/SUB X/CUO/SUB 4/.
550 LASRCUO4/SS CU/SS LA/SS O4/SS SR/SS O/SS; LABACUO4/SS BA/SS CU/SS
550 LA/SS O4/SS O/SS.
DOCUMENT= 1433
AUTH = HERTEL
DT = 02
KN = B40891306903
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388061
002 B40891306903
010 JOURNAL PAPER; THEORETICAL.
100 LINEAR CHARGE-DENSITY-WAVE INSTABILITY IN YBA/SUB 2/CU/SUB 3/O/SUB 7-
100 DELTA / AND THE PAIR-BREAKING EFFECT FROM COULOMB SCATTERING WITH
100 SUPERCONDUCTING ELECTRONS.
200 HERTEL, P.; APPEL, J. / SWIHART, J.C.
220 I. INST. FUR THEOR. PHYS., HAMBURG UNIV., WEST GERMANY
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.A, P.6708-15, REF.23
350 ISSN 0163-1829, CODEN PRBMDO
400 E-E SCATTERING BETWEEN CHARGE CARRIERS IN THE CUO/SUB 2/ PLANES AND A
400 ONE-DIMENSIONAL ELECTRON SYSTEM CAUSES A TEMPERATURE-DEPENDENT
400 PAIR-BREAKING EFFECT ON THE FORMATION OF A COMMENSURATE
400 CHARGE-DENSITY WAVE (CDW) IN THE ONE-DIMENSIONAL SYSTEM. THE EFFECT
400 DECREASES EXPONENTIALLY WHEN THE PLANES BECOME SUPERCONDUCTING,
400 ALLOWING FOR THE CDW INSTABILITY TO OCCUR AT OR NEAR THE
400 SUPERCONDUCTING TRANSITION TEMPERATURE T/SUB S/. THE CDW GAP RATIO 2
400 DELTA /SUB C0//K/SUB B/T/SUB C/ DEPENDS ON THE E-E SCATTERING RATE
400 GAMMA . THE TEMPERATURE DEPENDENCE OF THE ORDER PARAMETER DELTA /SUB
400 C/(T, GAMMA ) IS AFFECTED BY SUPERCONDUCTIVITY IN THE PLANE AND,
400 THEREFORE, IS DIFFERENT FROM THE BARDEEN-COOPER-SCHRIEFFER (BCS) GAP
400 FUNCTION. IN ORDER TO DISTINGUISH BETWEEN THE BCS AND CDW STATES, THE
400 NUCLEAR-SPIN RELAXATION RATES DUE TO MAGNETIC AND QUADRUPOLE
400 COUPLING, R/SUB C//R/SUB N/ AND Q/SUB C//Q/SUB N/, ARE FOUND AS
400 FUNCTIONS OF T. THE FREQUENCY DEPENDENCE OF THE INFRARED CONDUCTIVITY
400 DUE TO SINGLE-PARTICLE EXCITATIONS ACROSS THE CDW GAP SIGMA /SUB 1C/
400 IS EVALUATED AS A FUNCTION OF GAMMA (T), YIELDING THE
400 LEE-RICE-ANDERSON RESULT FOR T=0.
500 BARIUM COMPOUNDS; BCS THEORY; CHARGE DENSITY WAVES; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; SUPERCONDUCTING TRANSITION TEMPERATURE; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; COULOMB SCATTERING; CUO/SUB 2/
510 PLANES; ONE-DIMENSIONAL ELECTRON SYSTEM; PAIR-BREAKING EFFECT;
510 COMMENSURATE CHARGE-DENSITY WAVE; SUPERCONDUCTING TRANSITION
510 TEMPERATURE; BARDEEN-COOPER-SCHRIEFFER; NUCLEAR-SPIN RELAXATION
510 RATES; QUADRUPOLE COUPLING; INFRARED CONDUCTIVITY; YBA/SUB 2/CU/SUB
510 3/O/SUB 7- DELTA /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1434
AUTH = KRENN
DT = 02
KN = B40891306904
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388062
002 B40891306904
010 JOURNAL PAPER; EXPERIMENTAL.
100 TEMPERATURE DEPENDENCE OF FAR-INFRARED DIFFERENCE REFLECTIVITY OF
100 YBA/SUB 2/CU/SUB 3/O/SUB 7-Y/.
200 KRENN, H.; BAUER, G. / VOGL, G.; STRASSER, G.; GORNIK, E.
220 INST. FUR PHYS., MONTANUNIV. LEOBEN, AUSTRIA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.A, P.6716-26, REF.28
350 ISSN 0163-1829, CODEN PRBMDO
400 FAR-INFRARED DIFFERENCE REFLECTIVITY SPECTRA (50-450 CM/SUP -1/)
400 BELOW, ACROSS, AND ABOVE THE TRANSITION TEMPERATURE OF
400 POLYCRYSTALLINE SINGLE-PHASE YBA/SUB 2/CU/SUB 3/O/SUB 7-Y/ SAMPLES
400 WERE MEASURED. THE DATA ARE COMPARED WITH MODEL FITS USING THE
400 EXPLICIT TEMPERATURE DEPENDENCE OF THE MATTIS-BARDEEN CONDUCTIVITY,
400 AN EFFECTIVE-MEDIUM APPROACH AND TEMPERATURE-DEPENDENT PHONON
400 OSCILLATOR PARAMETERS, AND ALTERNATIVELY A PLASMA MODEL. FOR THE
400 PLASMA MODEL THE AUTHORS ALTERNATIVELY USE A GENERALIZED DRUDE-LIKE
400 EXPRESSION WITH A FREQUENCY-DEPENDENT DAMPING AFTER THOMAS ET AL.
400 (PHYS. REV. B 36, 846 (1987)) OR THE ORIGINAL MODEL AFTER ORENSTEIN
400 ET AL. (PHYS. REV. B 36, 729 (1987)) AND SHERWIN, RICHARDS, AND ZETTL
400 (PHYS. REV. B 37, 1587 (1988)) WITH A DRUDE CONTRIBUTION PLUS A
400 MID-INFRARED OSCILLATOR, BUT WITH CONSTANT CARRIER RELAXATION RATES.
400 THE MODELS EXPLAIN THE DIFFERENCE REFLECTIVITY DATA (PRECISION <0.2%)
400 WITH A FITTING ACCURACY OF 1-2% (MATTIS-BARDEEN MODEL) OR 2.3%
400 (PLASMA MODEL) OVER THE FULL TEMPERATURE RANGE. IN ORDER TO
400 INVESTIGATE THEIR APPLICABILITY, REFLECTIVITY, AND CONDUCTIVITY DATA
400 OF A HIGHLY ORIENTED YBA/SUB 2/CU/SUB 3/O/SUB 7-Y/ SAMPLE, AS
400 RECENTLY PUBLISHED BY BONN ET AL. (PHYS. REV. LETT. 58, 2249 (1987)),
400 WERE ALSO FITTED WITH BOTH MODELS. BECAUSE OF THE FREQUENCY
400 DEPENDENCE OF THE FREE-CARRIER DAMPING RATES, IT WAS IMPORTANT TO
400 FULFIL THE KRAMERS-KRONIG RELATIONS BETWEEN THE REAL AND THE
400 IMAGINARY PART OF THE DYNAMIC CONDUCTIVITY IN THE CALCULATIONS. FOR
400 BOTH MODELS THE CHARACTERISTIC DEPENDENCES OF THE CONDUCTIVITY ON
400 FREQUENCY AND TEMPERATURE ARE GIVEN. WHEREAS, NATURALLY, THE
400 MATTIS-BARDEEN MODEL YIELDS A GAPLIKE DEPRESSION OF THE CONDUCTIVITY
400 FOR FREQUENCIES BELOW AN ASSUMED GAP, THE PLASMA MODEL RESULTS IN
400 SOMEWHAT SMOOTHER DEPENDENCES OF RE( SIGMA ( OMEGA )) AND IM( SIGMA (
400 OMEGA )) IN THE FREQUENCY REGION OF INTEREST.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; INFRARED SPECTRA
500 OF INORGANIC SOLIDS; KRAMERS-KRONIG RELATIONS; REFLECTIVITY; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; FAR-INFRARED DIFFERENCE
510 REFLECTIVITY; MATTIS-BARDEEN CONDUCTIVITY; EFFECTIVE-MEDIUM APPROACH;
510 PHONON OSCILLATOR PARAMETERS; PLASMA MODEL; CARRIER RELAXATION RATES;
510 KRAMERS-KRONIG RELATIONS; YBA/SUB 2/CU/SUB 3/O/SUB 7-Y/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1435
AUTH = BERERA
DT = 02
KN = B40891306905
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388063
002 B40891306905
010 JOURNAL PAPER; THEORETICAL.
100 OXYGEN-VACANCY PHASE EQUILIBRIA IN YBA/SUB 2/CU/SUB 3/O/SUB Z/
100 CALCULATED BY THE CLUSTER VARIATION METHOD.
200 BERERA, A. / DE FONTAINE, D.
220 DEPT. OF PHYS., CALIFORNIA UNIV., BERKELEY, CA, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.A, P.6727-36, REF.44
350 ISSN 0163-1829, CODEN PRBMDO
400 ORDERING IN THE CU-O BASAL PLANE OF YBA/SUB 2/CU/SUB 3/O/SUB X/ IS
400 INVESTIGATED AS A FUNCTION OF OXYGEN CONTENT, CHEMICAL POTENTIAL, AND
400 TEMPERATURE. TWO PHASE DIAGRAMS ARE CALCULATED BY MEANS OF THE
400 CLUSTER VARIATION METHOD APPLIED TO ASYMMETRIC TWO-DIMENSIONAL ISING
400 MODELS WITH ONE NEAREST-NEIGHBOR AND TWO SECOND-NEAREST NEIGHBOR
400 INTERACTIONS. THE INTERACTION PARAMETERS SELECTED ENSURE THE
400 STABILITY OF THE ORTHORHOMBIC STRUCTURES NEAR Z=7 AND FOR ONE OF THE
400 CASES ALSO INCLUDES A CELL-DOUBLING PHASE AT Z=6.5. OXYGEN PAIR AND
400 POINT PROBABILITIES ARE STUDIED AS A FUNCTION OF TEMPERATURE UNDER
400 CONDITIONS OF CONSTANT OXYGEN PARTIAL PRESSURE. COMPARISON OF SITE
400 OCCUPANCY AND ORTHORHOMBIC-TO-TETRAGONAL SECOND-ORDER TRANSITION
400 TEMPERATURES WITH RECENT EXPERIMENTAL DATA ARE IN EXCELLENT
400 AGREEMENT.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; PHASE
500 EQUILIBRIUM; SOLID-STATE PHASE TRANSFORMATIONS; VARIATIONAL
500 TECHNIQUES; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CLUSTER VARIATION METHOD; CU-O BASAL
510 PLANE; CHEMICAL POTENTIAL; PHASE DIAGRAMS; TWO-DIMENSIONAL ISING
510 MODELS; ORTHORHOMBIC STRUCTURES; CELL-DOUBLING PHASE; SITE OCCUPANCY;
510 SECOND-ORDER TRANSITION TEMPERATURES; YBA/SUB 2/CU/SUB 3/O/SUB X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1436
AUTH = BAUHOFER
DT = 02
KN = B40891306906
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388064
002 B40891306906
010 JOURNAL PAPER; EXPERIMENTAL.
100 SUPERCONDUCTIVITY IN THE SYSTEM BI/SUB 2/SR/SUB 2-X/LA/SUB X/CUO/SUB
100 6+ DELTA /: HOLE FORMATION BY (LAO)/SUP +/.
200 BAUHOFER, W.; MATTAUSCH, HJ.; KREMER, R.K.; MURUGARAJ, P.; SIMON, A.
220 MAX-PLANCK-INST. FUR FESTKORPERFORSCHUNG, STUTTGART, WEST GERMANY
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7244-7, REF.18
350 ISSN 0163-1829, CODEN PRBMDO
400 SUPERCONDUCTIVITY WITH A T/SUB C/ AS HIGH AS 25.5 K HAS BEEN OBSERVED
400 IN BI/SUB 2/SR/SUB 2/CUO/SUB 6/ BY PARTIAL SUBSTITUTION OF SR BY LA.
400 SUPERCONDUCTIVITY IS LIMITED TO A RANGE OF 10% TO 38% SUBSTITUTION.
400 IN BI/SUB 2/SR/SUB 2-X/LA/SUB X/CUO/SUB 6+ DELTA / EACH LA ATOM
400 INTRODUCES ONE ADDITIONAL O ATOM INTO THE CRYSTAL RESULTING IN DELTA
400 =X. THEREBY ONE EXTRA HOLE PER SUBSTITUTED SR ATOM IS PRODUCED. THE
400 AUTHORS DISCUSS THE PROBABLE CRYSTALLOGRAPHIC SITE OF THE ADDITIONAL
400 OXYGEN ATOMS WITH RESPECT TO THE OXIDATION STATES OF BISMUTH AND
400 COPPER IN THESE COMPOUNDS.
500 BISMUTH COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM COMPOUNDS; STRONTIUM
500 COMPOUNDS; SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTOR; HOLE FORMATION; TRANSITION
510 TEMPERATURE; (LAO)/SUP +/; CRYSTALLOGRAPHIC SITE; OXIDATION STATES;
510 25.5 K; BI/SUB 2/SR/SUB 2-X/LA/SUB X/CUO/SUB 6+ DELTA /.
550 BI2SRLACUO/SS BI2/SS BI/SS CU/SS LA/SS SR/SS O/SS.
560 TEMPERATURE 2.55 E+01 K.
DOCUMENT= 1437
AUTH = FELSTEIN
DT = 02
KN = B40891306907
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388065
002 B40891306907
010 JOURNAL PAPER; THEORETICAL.
100 NATURE OF THE MAGNETIC ORDER OF GD IN SUPERCONDUCTING AND
100 NONSUPERCONDUCTING GDBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
200 FELSTEINER, J.
220 DEPT. OF PHYS., TECHNION-ISRAEL INST. OF TECHNOL., HAIFA, ISRAEL
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7248-50, REF.21
350 ISSN 0163-1829, CODEN PRBMDO
400 LOW-TEMPERATURE ORDERED STATES OF THE GD MOMENTS IN GDBA/SUB 2/CU/SUB
400 3/O/SUB 7- DELTA / HAVE BEEN INVESTIGATED BY THE USE OF THE
400 LUTTINGER-TISZA METHOD. IT IS SHOWN THAT BY TAKING INTO ACCOUNT THE
400 EFFECT OF THE CRYSTAL FIELD ON THE GD IONS, THE GROSS FEATURES OF THE
400 OBSERVED ORDERING CAN BE UNDERSTOOD IF THE DIPOLE-DIPOLE INTERACTION
400 IS ASSUMED TO BE PREDOMINANT. HOWEVER, THE INCLUSION OF WEAK
400 SUPEREXCHANGE INTERACTION APPEARS NECESSARY. IT IS SHOWN THAT AN
400 ANTIFERROMAGNETIC STATE WITH THE GD MOMENTS LYING ALONG THE C AXIS
400 CAN BE STABILIZED IF A CERTAIN CONDITION IS MET FOR THE G TENSOR OF
400 THE GD IONS.
500 ANTIFERROMAGNETIC PROPERTIES OF SUBSTANCES; BARIUM COMPOUNDS; CRYSTAL
500 FIELD INTERACTIONS; GADOLINIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; MAGNETIC MOMENTS; MAGNETIC STRUCTURE; SUPEREXCHANGE
500 INTERACTIONS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; LOW TEMPERATURE ORDERED STATES;
510 NONSUPERCONDUCTING STATE; MAGNETIC ORDER; GD MOMENTS; LUTTINGER-TISZA
510 METHOD; CRYSTAL FIELD; DIPOLE-DIPOLE INTERACTION; WEAK SUPEREXCHANGE
510 INTERACTION; ANTIFERROMAGNETIC STATE; G TENSOR; GDBA/SUB 2/CU/SUB
510 3/O/SUB 7- DELTA /.
550 GDBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS GD/SS O/SS.
DOCUMENT= 1438
AUTH = HARKONEN
DT = 02
KN = B40891306908
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388066
002 B40891306908
010 JOURNAL PAPER; EXPERIMENTAL.
100 PERCOLATION MODELS IN GRANULAR HIGH-T/SUB C/ SUPERCONDUCTORS IN THE
100 TRANSITION REGION.
200 HARKONEN, K. / TITTONEN, I.; WESTERHOLM, J.; ULLAKKO, K.
220 REACTOR LAB., TECH. RES. CENTRE OF FINLAND, ESPOO, FINLAND
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7251-4, REF.6
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHORS REPORT ON DETAILED SIMULTANEOUS MEASUREMENTS OF
400 ELECTRICAL RESISTIVITY AND AC MAGNETIC SUSCEPTIBILITY OF A CAREFULLY
400 PREPARED GRANULAR YBA/SUB 2/CU/SUB 3/O/SUB 6.92/ SAMPLE IN THE
400 SUPERCONDUCTING TRANSITION REGION. THE OBSERVED FEATURES ARE
400 EXPLAINED IN TERMS OF A TWO-STAGE MODEL. THE FIRST STAGE IS
400 ATTRIBUTED TO THE GROWING OF SUPERCONDUCTING INCLUSIONS. IN THE
400 SECOND STAGE OF THE TRANSITION THEY SIMULATE BOTH ISOTROPIC AND
400 ANISOTROPIC SUPERCONDUCTIVITIES BY BOND PERCOLATION MODELS, WHERE THE
400 CONDUCTION BETWEEN NEAREST-NEIGHBOR GRAINS IS ASSUMED TO BE
400 CORRELATED ONE OR TWO DIMENSIONAL OR NONCORRELATED THREE DIMENSIONAL.
400 THE AUTHORS OBSERVE NO QUALITATIVE DIFFERENCES IN THE BULK MATTER
400 BETWEEN THE SUPERCONDUCTIVITIES OF DIFFERENT DIMENSIONALITIES. THUS,
400 THE GENERAL BEHAVIOR OF THE BULK MATTER CAN BE ATTRIBUTED TO GENERAL
400 PROPERTIES OF RANDOM MEDIA. THE PERCOLATION MODELS CAN BE APPLIED TO
400 ALL OBSERVED POLYCRYSTALLINE SUPERCONDUCTORS.
500 BARIUM COMPOUNDS; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE
500 SEMICONDUCTORS AND INSULATORS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 MAGNETIC SUSCEPTIBILITY; PERCOLATION; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; PERCOLATION MODELS; GRANULAR
510 HIGH-T/SUB C/ SUPERCONDUCTORS; TRANSITION REGION; ELECTRICAL
510 RESISTIVITY; AC MAGNETIC SUSCEPTIBILITY; SUPERCONDUCTING TRANSITION
510 REGION; TWO-STAGE MODEL; SUPERCONDUCTING INCLUSIONS; RANDOM MEDIA;
510 POLYCRYSTALLINE SUPERCONDUCTORS; YBA/SUB 2/CU/SUB 3/O/SUB 6.92/.
550 YBA2CU3O6.92/SS O6.92/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1439
AUTH = PIRO
DT = 02
KN = B40891306909
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388067
002 B40891306909
010 JOURNAL PAPER; EXPERIMENTAL.
100 INFRARED REFLECTIVITY AND VIBRATIONAL STRUCTURE OF SUPERCONDUCTING
100 BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB 8+X/.
200 PIRO, O.E.; GUIDA, J.A.; MASSA, N.E.; AYMONINO, P.J. / CASTELLANO,
200 E.E.; BASSO, H.C.; GALLO, J.N.H.; MARTIN, A.A.
220 DEPT. DE FISICA, UNIV. NACIONAL DE LA PLATA, ARGENTINA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7255-8, REF.15
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHORS REPORT THE ROOM-TEMPERATURE INFRARED (IR) REFLECTANCE
400 SPECTRUM AND THE KRAMERS-KRONIG IMAGINARY DIELECTRIC FUNCTION (
400 EPSILON ") OF THE BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB 8+X/ (2:2:1:2)
400 SUPERCONDUCTOR (T/SUB C/=82 K) IN THE 250-1000 CM/SUP -1/ REGION.
400 EPSILON " SHOWS PHONONLIKE MAXIMA AT 276, 316, 347, 361, AND 600
400 CM/SUP -1/. SEVERAL SPECTRAL FEATURES ARE SIMILAR TO THOSE FOUND IN
400 1:2:3-TYPE MATERIALS INCLUDING SUPERCONDUCTING MBA/SUB 2/CU/SUB
400 3/O/SUB 7-X/ AND SEMICONDUCTING M/SUB BA2/CU/SUB 3/O/SUB 6/ (M=Y OR
400 SOME RARE-EARTH ELEMENT), AS EXPECTED FROM THEIR CLOSELY RELATED
400 PEROVSKITELIKE CRYSTAL STRUCTURES. THE CORRELATION EXISTING BETWEEN A
400 FACTOR GROUP ANALYSIS OF THE GAMMA POINT PHONONS IN 2:2:1:2 AND 1:2:3
400 COMPOUNDS AFFORDS A TENTATIVE ASSIGNMENT OF IR-ACTIVE MODES IN THE
400 BISMUTH SUPERCONDUCTOR BY COMPARISON WITH REPORTED DATA IN 1:2:3
400 MATERIALS.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; DIELECTRIC FUNCTION;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; INFRARED SPECTRA OF INORGANIC
500 SOLIDS; KRAMERS-KRONIG RELATIONS; LATTICE DYNAMICS; REFLECTIVITY;
500 STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; IR REFLECTIVITY; VIBRATIONAL
510 STRUCTURE; ROOM-TEMPERATURE; KRAMERS-KRONIG IMAGINARY DIELECTRIC
510 FUNCTION; PHONONLIKE MAXIMA; PEROVSKITELIKE CRYSTAL STRUCTURES;
510 FACTOR GROUP ANALYSIS; IR-ACTIVE MODES; 250 TO 1000 CM/SUP -1/;
510 BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB 8+X/.
550 BI2SR2CACU2O/SS BI2/SS CU2/SS SR2/SS BI/SS CA/SS CU/SS SR/SS O/SS.
560 WAVELENGTH 1.0 E-05 TO 4.0 E-05 M.
DOCUMENT= 1440
AUTH = DOS
DT = 02
KN = B40891306910
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388068
002 B40891306910
010 JOURNAL PAPER; THEORETICAL.
100 ENHANCED PAIRING IN THE REPULSIVE HUBBARD MODEL WITH
100 NEXT-NEAREST-NEIGHBOR HOPPING.
200 DOS SANTOS, R.R.
220 DEPT. OF PHYS., CALIFORNIA UNIV., SAN DIEGO, LA JOLLA, CA, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7259-62, REF.23
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHOR STUDIES THE BEHAVIOR OF PAIR SUSCEPTIBILITIES IN THE
400 TWO-DIMENSIONAL REPULSIVE HUBBARD MODEL WITH NEXT-NEAREST-NEIGHBOR
400 HOPPING T/SUB 2/ BY MONTE CARLO SIMULATIONS. IN A CERTAIN RANGE OF
400 BAND FILLING, HE FINDS THAT THE D-WAVE PAIR SUSCEPTIBILITIES CAN BE
400 ENHANCED BY A HUBBARD REPULSION U WITH RESPECT TO THE NONINTERACTING
400 CASE, UNLIKE THE CASE WITH T/SUB 2/=0. THE AUTHOR DISCUSSES THE
400 CONNECTION OF THIS MODEL TO CUO/SUB 2/ PLANES IN THE OXIDE
400 SUPERCONDUCTORS AND THE POSSIBLE IMPLICATION OF HIS RESULTS FOR THESE
400 MATERIALS.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; HUBBARD MODEL; MONTE CARLO METHODS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; ENHANCED PAIRING; REPULSIVE HUBBARD
510 MODEL; NEXT-NEAREST-NEIGHBOR HOPPING; PAIR SUSCEPTIBILITIES; MONTE
510 CARLO SIMULATIONS; CUO/SUB 2/ PLANES; OXIDE SUPERCONDUCTORS.
DOCUMENT= 1441
AUTH = BIGGS
DT = 02
KN = B40891306911
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388069
002 B40891306911
010 JOURNAL PAPER; EXPERIMENTAL.
100 FLUX CREEP AND CRITICAL-CURRENT ANISOTROPY IN BI/SUB 2/SR/SUB
100 2/CACU/SUB 2/O/SUB 8+ DELTA /.
200 BIGGS, B.D.; KUNCHUR, M.N.; LIN, J.J.; POON, S.J. / ASKEW, T.R.;
200 FLIPPEN, R.B.; SUBRAMANIAN, M.A.; GOPALAKRISHNAN, J.; SLEIGHT, A.W.
220 DEPT. OF PHYS., VIRGINIA UNIV., CHARLOTTESVILLE, VA, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7309-12, REF.14
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHORS HAVE STUDIED MAGNETIC RELAXATION, TEMPERATURE DEPENDENCE
400 OF THE CRITICAL CURRENTS, MAGNETIC IRREVERSIBILITY, AND LOWER
400 CRITICAL FIELDS IN SINGLE CRYSTALS OF THE HIGH-T/SUB C/
400 SUPERCONDUCTOR BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB 8+ DELTA /
400 (IDEALIZED COMPOSITION) THROUGH MAGNETIZATION MEASUREMENTS. THE
400 RESULTS ARE ANALYZED WITHIN THE FRAMEWORK OF THE CRITICAL STATE AND A
400 THERMALLY ACTIVATED FLUX-CREEP MODEL. THE RESULTS INDICATE THREE
400 DIFFERENT CRITICAL CURRENTS AND FLUX-CREEP RATES DEPENDING ON THE
400 RELATIVE ORIENTATION OF THE CURRENT, THE FIELD, AND THE CU-O PLANES.
400 THE FLUX-CREEP RATE FOR FLUX LINES MOVING PERPENDICULAR TO THE PLANES
400 WAS FOUND TO BE UNOBSERVABLY LOW. SIMILARLY, THE CRITICAL-CURRENT
400 DENSITY PERPENDICULAR TO THE PLANES WAS VERY LOW. HOWEVER THE
400 CRITICAL-CURRENT DENSITY IN THE PLANE AND THE FLUX-PINNING WELL DEPTH
400 U/SUB 0/, FOR FLUXON MOTION PARALLEL TO THE PLANES, ARE SIMILAR TO
400 THE VALUES FOUND IN Y-BA-CU-O. IMPLICATIONS OF INSULATING LAYERS
400 BETWEEN THE CU-O PLANES ARE DISCUSSED.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CRITICAL CURRENT DENSITY
500 (SUPERCONDUCTIVITY); FLUX CREEP; FLUX PINNING; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; MAGNETIC RELAXATION; MAGNETISATION; STRONTIUM
500 COMPOUNDS; SUPERCONDUCTING CRITICAL FIELD.
510 HIGH TEMPERATURE SUPERCONDUCTOR; FLUX CREEP; CRITICAL-CURRENT
510 ANISOTROPY; MAGNETIC RELAXATION; TEMPERATURE DEPENDENCE; MAGNETIC
510 IRREVERSIBILITY; LOWER CRITICAL FIELDS; SINGLE CRYSTALS; HIGH-T/SUB
510 C/ SUPERCONDUCTOR; MAGNETIZATION; CRITICAL STATE; CU-O PLANES;
510 CRITICAL-CURRENT DENSITY; FLUX-PINNING WELL DEPTH; FLUXON MOTION;
510 INSULATING LAYERS; BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB 8+ DELTA /.
550 BI2SR2CACU2O/SS BI2/SS CU2/SS SR2/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1442
AUTH = CHANG
DT = 02
KN = B40891306912
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388070
002 B40891306912
010 JOURNAL PAPER; EXPERIMENTAL.
100 POSSIBILITY OF A RESONATING-VALENCE-BOND STATE IN THE HIGH-T/SUB C/
100 SUPERCONDUCTOR BI/SUB 4/CA/SUB 3/SR/SUB 3/CU/SUB 4/O/SUB 16+X/.
200 CHANG, Y.; MING TANG; HWU, Y.; ONELLION, M.; HUBER, D.L.;
200 MARGARITONDO, G. / MORRIS, P.A.; BONNER, W.A.; TARASCON, J.M.;
200 STOFFEL, N.G.
220 DEPT. OF PHYS., WISCONSIN UNIV., MADISON, WI, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7313-15, REF.6
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHORS COMPARED THE PHOTOEMISSION EDGE LINE SHAPE OF BI/SUB
400 4/CA/SUB 3/SR/SUB 3/CU/SUB 4/O/SUB 16+X/ WITH THOSE OF THE AU AND AL
400 FERMI EDGES. SPECIFICALLY, THEY SEARCHED FOR THE INTENSITY DECREASE
400 IN THE NEIGHBORHOOD OF THE FERMI LEVEL, PREDICTED IN THE CASE OF
400 PHOTOEMISSION FROM A RESONATING-VALENCE-BOND (RVB) STATE. THEY FOUND
400 NO POSITIVE EVIDENCE FOR THIS DECREASE AND THEY ESTIMATED THAT, IF
400 THE RVB STATE EXISTS, THEN THE UPPER LIMIT FOR THE MAXIMUM SPINON
400 ENERGY IS 65 MEV. THE AUTHORS' DATA ANALYSIS ALSO INDICATES THAT THE
400 MERE OBSERVATION OF AN APPARENT SPECTRAL EDGE IS NOT SUFFICIENT PER
400 SE TO RULE OUT A RVB STATE.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; FERMI LEVEL; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; PHOTOELECTRON SPECTRA; SPECTRAL LINE BREADTH;
500 STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; RESONATING-VALENCE-BOND STATE;
510 HIGH-T/SUB C/ SUPERCONDUCTOR; PHOTOEMISSION EDGE LINE SHAPE; FERMI
510 EDGES; FERMI LEVEL; RVB STATE; SPINON ENERGY; BI/SUB 4/CA/SUB
510 3/SR/SUB 3/CU/SUB 4/O/SUB 16+X/.
550 BI4CA3SR3CU4O/SS BI4/SS CA3/SS CU4/SS SR3/SS BI/SS CA/SS CU/SS SR/SS
550 O/SS.
DOCUMENT= 1443
AUTH = CLAESSEN
DT = 02
KN = B40891306913
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388071
002 B40891306913
010 JOURNAL PAPER; EXPERIMENTAL.
100 SURFACE STUDY OF THE 83-K SUPERCONDUCTOR BI/SUB 2/SR/SUB 2/CACU/SUB
100 2/O/SUB 8/ BY LOW-ENERGY ELECTRON DIFFRACTION AND ANGLE-RESOLVED
100 INVERSE PHOTOEMISSION SPECTROSCOPY.
200 CLAESSEN, R.; MANZKE, R.; CARSTENSEN, H.; BURANDT, B.; BUSLAPS, T.;
200 SKIBOWSKI, M. / FINK, J.
220 INST. FUR EXPERIMENTALPHYS., KIEL UNIV., WEST GERMANY
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7316-19, REF.29
350 ISSN 0163-1829, CODEN PRBMDO
400 LOW-ENERGY ELECTRON DIFFRACTION (LEED) AND ANGLE-RESOLVED INVERSE
400 PHOTOEMISSION SPECTROSCOPY (ARIPES) HAVE BEEN APPLIED TO THE CLEAVED
400 SURFACE OF BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB 8/ SINGLE CRYSTALS. THE
400 LEED PATTERN SHOWS A SURFACE LATTICE WHICH IS IDENTICAL TO THE
400 SUPERLATTICE FOUND IN THE BULK STRUCTURE. ARIPES ALONG THE GAMMA
400 X(A*) DIRECTION YIELDS NONDISPERSIVE UNOCCUPIED ELECTRONIC STATES AT
400 2.9 AND APPROXIMATELY 5 EV ABOVE THE FERMI ENERGY ATTRIBUTED TO BI-O
400 DERIVED CONDUCTION BANDS. AT ABOUT /SUP 1///SUB 2/ GAMMA X THE
400 EXPERIMENTAL DENSITY OF STATES AT THE FERMI LEVEL INCREASES. THIS MAY
400 BE DUE TO THE CROSSING OF THE O(1) BAND THROUGH E/SUB F/, DERIVED
400 FROM OXYGEN ATOMS IN THE CU-O PLANES.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; FERMI LEVEL; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; INVERSE PHOTOEMISSION SPECTROSCOPY; LOW ENERGY
500 ELECTRON DIFFRACTION; STRONTIUM COMPOUNDS; SURFACE ELECTRON STATES.
510 HIGH TEMPERATURE SUPERCONDUCTOR; LEED; LOW-ENERGY ELECTRON
510 DIFFRACTION; ANGLE-RESOLVED INVERSE PHOTOEMISSION SPECTROSCOPY;
510 CLEAVED SURFACE; SINGLE CRYSTALS; SURFACE LATTICE; SUPERLATTICE;
510 ARIPES; NONDISPERSIVE UNOCCUPIED ELECTRONIC STATES; FERMI ENERGY;
510 BI-O DERIVED CONDUCTION BANDS; DENSITY OF STATES; FERMI LEVEL; CU-O
510 PLANES; 83 K; BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB 8/.
550 BI2SR2CACU2O8/SUR BI2/SUR CU2/SUR SR2/SUR BI/SUR CA/SUR CU/SUR O8/SUR
550 SR/SUR O/SUR BI2SR2CACU2O8/SS BI2/SS CU2/SS SR2/SS BI/SS CA/SS CU/SS
550 O8/SS SR/SS O/SS.
560 TEMPERATURE 8.3 E+01 K.
DOCUMENT= 1444
AUTH = CLAYHOLD
DT = 02
KN = B40891306914
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388072
002 B40891306914
010 JOURNAL PAPER; EXPERIMENTAL.
100 APPROACHING THE MOTT-HUBBARD INSULATOR IN THE 85-K SUPERCONDUCTOR
100 BI/SUB 2/(SR, CA)/SUB 3/CU/SUB 2/O/SUB 8+D/ BY DOPING WITH TM.
200 CLAYHOLD, J.; HAGEN, S.J.; ONG, N.P. / TARASCON, J.M.; BARBOUX, P.
220 JOSEPH HENRY LABS. OF PHYS., PRINCETON UNIV., NJ, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7320-3, REF.24
350 ISSN 0163-1829, CODEN PRBMDO
400 AS X INCREASES IN BI/SUB 4/SR/SUB 3/CA/SUB 3-X/TM/SUB X/CU/SUB
400 4/O/SUB 16+Y/ THE HALL CARRIER DENSITY N/SUB H/ DECREASES LINEARLY.
400 THE VARIATION IS CONSISTENT WITH MOTT-HUBBARD BEHAVIOR, BUT IN
400 CONFLICT WITH BAND-STRUCTURE RESULTS WHICH IGNORE CORRELATIONS. THE
400 AUTHORS FIND THAT THE VARIATION OF T/SUB C/ VS. N/SUB H/ IS
400 NONMONOTONIC. THE SOURCE OF THE LARGE CARRIER POPULATION (0.4/CU) IN
400 THE UNDOPED (X=0) COMPOUND IS DISCUSSED.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CARRIER DENSITY; HALL EFFECT;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; STRONTIUM COMPOUNDS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; THULIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; TRANSITION TEMPERATURE; MOTT-HUBBARD
510 INSULATOR; HALL CARRIER DENSITY; BAND-STRUCTURE; CARRIER POPULATION;
510 85 K; BI/SUB 4/SR/SUB 3/CA/SUB 3-X/TM/SUB X/CU/SUB 4/O/SUB 16+Y/.
550 BI4SR3CATMCU4O/SS BI4/SS CU4/SS SR3/SS BI/SS CA/SS CU/SS SR/SS TM/SS
550 O/SS.
560 TEMPERATURE 8.5 E+01 K.
DOCUMENT= 1445
AUTH = CLAYHOLD
DT = 02
KN = B40891306915
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388073
002 B40891306915
010 JOURNAL PAPER; EXPERIMENTAL.
100 HALL-EFFECT ANOMALY IN THE HIGH-T/SUB C/ COPPER-BASED PEROVSKITES.
200 CLAYHOLD, J.; ONG, N.P.; WANG, Z.Z. / TARASCON, J.M.; BARBOUX, P.
220 JOSEPH HENRY LABS. OF PHYS., PRINCETON UNIV., NJ, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7324-7, REF.22
350 ISSN 0163-1829, CODEN PRBMDO
400 THE TEMPERATURE (T) DEPENDENCE OF THE HALL COEFFICIENT R/SUB H/ IS
400 STUDIED IN CO-DOPED AND NI-DOPED YBACU/SUB 3/O/SUB 7/, AND NI-DOPED
400 LA/SUB 2-X/SR/SUB X/CUO/SUB 4/. IN THESE SYSTEMS THE AUTHORS SHOW
400 THAT AS THE HIGH-T/SUB C/ BEHAVIOR IS SUPPRESSED, THE UNUSUAL T
400 DEPENDENCE OF R/SUB H/ IS ALSO SUPPRESSED IN A CHARACTERISTIC WAY.
400 THE EVIDENCE STRONGLY SUGGESTS THAT THE STRONG T DEPENDENCE OF R/SUB
400 H/ IS AN ANOMALY SPECIFIC TO THE UNCONVENTIONAL NORMAL STATE IN MOST,
400 PERHAPS ALL, OF THE HIGH-T/SUB C/ OXIDES.
500 BARIUM COMPOUNDS; HALL EFFECT; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 LANTHANUM COMPOUNDS; STRONTIUM COMPOUNDS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; TEMPERATURE DEPENDENCE; HALL-EFFECT
510 ANOMALY; HIGH-T/SUB C/ COPPER-BASED PEROVSKITES; NORMAL STATE;
510 YBA/SUB 2/CU/SUB 3-X/CO/SUB X/O/SUB 7-Y/; YBA/SUB 2/CU/SUB 3-X/NI/SUB
510 X/O/SUB 7-Y/; LA/SUB 2-X/SR/SUB X/CUO/SUB 4/:NI.
550 YBA2CUCOO/SS BA2/SS BA/SS CO/SS CU/SS O/SS Y/SS; YBA2CUNIO/SS BA2/SS
550 BA/SS CU/SS NI/SS O/SS Y/SS; LASRCUO4:NI/SS LASRCUO4/SS CU/SS LA/SS
550 NI/SS O4/SS SR/SS O/SS NI/EL NI/DOP.
DOCUMENT= 1446
AUTH = DRUBE
DT = 02
KN = B40891306916
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388074
002 B40891306916
010 JOURNAL PAPER; EXPERIMENTAL.
100 EMPTY STATES NEAR THE FERMI LEVEL IN BI/SUB 2/SR/SUB 2/CACU/SUB
100 2/O/SUB 8/.
200 DRUBE, W.; HIMPSEL, F.J.; CHANDRASHEKHAR, G.V.; SHAFER, M.W.
220 IBM THOMAS J. WATSON RES. CENTER, YORKTOWN HEIGHTS, NY, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7328-31, REF.20
350 ISSN 0163-1829, CODEN PRBMDO
400 UNOCCUPIED STATES ARE SEEN AT THE FERMI LEVEL IN BI/SUB 2/SR/SUB
400 2/CACU/SUB 2/O/SUB 8/ BY USE OF INVERSE PHOTOEMISSION. THEY HAVE
400 PARTIAL OXYGEN 2P CHARACTER, AS EVIDENCED BY A RESONANCE AT THE O 2S
400 CORE-LEVEL THRESHOLD AND BY THE SIMILARITY BETWEEN THE INVERSE
400 PHOTOEMISSION SPECTRUM AND THE O 1S ABSORPTION EDGE. THESE STATES ARE
400 LIKELY TO BE RELATED TO THE HOLE STATES INTRODUCED BY DOPING OF OXIDE
400 SUPERCONDUCTORS. A PEAK AT E/SUB F/+2.9 EV CAN BE ASSIGNED TO THE
400 UNOCCUPIED CU 3D STATES (IF THEY ARE LOCALIZED) OR TO THE BI 6P
400 STATES (FOR DELOCALIZED CU 3D STATES).
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; FERMI LEVEL; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; INVERSE PHOTOEMISSION SPECTROSCOPY; STRONTIUM
500 COMPOUNDS; SURFACE ELECTRON STATES.
510 HIGH TEMPERATURE SUPERCONDUCTOR; EMPTY STATES; FERMI LEVEL; INVERSE
510 PHOTOEMISSION; O 2S CORE-LEVEL THRESHOLD; O 1S ABSORPTION EDGE; HOLE
510 STATES; DOPING; OXIDE SUPERCONDUCTORS; UNOCCUPIED CU 3D STATES; BI 6P
510 STATES; DELOCALIZED CU 3D STATES; BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB
510 8/.
550 BI2SR2CACU2O8/SS BI2/SS CU2/SS SR2/SS BI/SS CA/SS CU/SS O8/SS SR/SS
550 O/SS.
DOCUMENT= 1447
AUTH = HORVATIC
DT = 02
KN = B40891306917
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388075
002 B40891306917
010 JOURNAL PAPER; EXPERIMENTAL.
100 NMR EVIDENCE FOR LOCALIZED SPINS ON CU(2) SITES FROM CU NMR IN
100 YBA/SUB 2/CU/SUB 3/O/SUB 7/ AND YBA/SUB 2/CU/SUB 3/O/SUB 6.75/ SINGLE
100 CRYSTALS.
200 HORVATIC, M.; SEGRANSAN, P.; BERTHIER, C.; BERTHIER, Y.; BUTAUD, P. /
200 HENRY, J.Y.; COUACH, M.; CHAMINADE, J.P.
220 LAB. DE SPECTROMETRIE PHYS., UNIV. JOSEPH FOURIER,
220 SAINT-MARTIN-D'HERES, FRANCE
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7332-5, REF.25
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHORS REPORT /SUP 63,65/CU NMR SPECTRA AND NUCLEAR SPIN-LATTICE
400 RELAXATION DATA FOR YBA/SUB 2/CU/SUB 3/O/SUB 7/ (T/SUB C/=91 K) AND
400 YBA/SUB 2/CU/SUB 3/O/SUB 6.75/ (T/SUB C/=57 K) SINGLE CRYSTALS
400 BETWEEN 45 AND 300 K. AN ANALYSIS OF THE SPIN-LATTICE RELAXATION
400 RATES GIVES EVIDENCE FOR LOCALIZED ELECTRONIC SPINS ON THE PLANAR
400 CU(2) SITES. IN YBA/SUB 2/CU/SUB 3/O/SUB 6.75/ BOTH FOURFOLD AND
400 TWOFOLD OXYGEN-COORDINATED CU(1) SITES ARE OBSERVED; THE LATTER
400 EXPERIENCE THE SAME QUADRUPOLAR COUPLING (V/SUB Q/ APPROXIMATELY=31.5
400 MHZ) AS THE CU(2) SITES BUT A NEARLY ZERO MAGNETIC HYPERFINE SHIFT
400 AND A MUCH SLOWER RELAXATION RATE (D/SUP 10/ CONFIGURATION).
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; NUCLEAR MAGNETIC
500 RESONANCE; NUCLEAR SPIN-LATTICE RELAXATION; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; /SUP 63/CU; /SUP 65/CU; NMR;
510 LOCALIZED SPINS; SINGLE CRYSTALS; NUCLEAR SPIN-LATTICE RELAXATION;
510 QUADRUPOLAR COUPLING; NEARLY ZERO MAGNETIC HYPERFINE SHIFT;
510 RELAXATION RATE; 45 TO 300 K; YBA/SUB 2/CU/SUB 3/O/SUB 7/; YBA/SUB
510 2/CU/SUB 3/O/SUB 6.75/.
550 YBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS;
550 YBA2CU3O6.75/SS O6.75/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 4.5 E+01 TO 3.0 E+02 K.
DOCUMENT= 1448
AUTH = KOYAMA
DT = 02
KN = B40891306918
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388076
002 B40891306918
010 JOURNAL PAPER; EXPERIMENTAL.
100 SOFT PHONON MODE IN THE HIGH-T/SUB C/ SUPERCONDUCTOR TL-BA-CA-CU-O.
200 KOYAMA, Y.; HOSHIYA, H.
220 DEPT. OF METALL., TOKYO INST. OF TECHNOL., JAPAN
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7336-8, REF.22
350 ISSN 0163-1829, CODEN PRBMDO
400 THERMAL DIFFUSE SCATTERING DUE TO A TRANSVERSE PHONON (E//(010))
400 PROPAGATING ALONG THE (100) DIRECTION WAS FOUND IN
400 ELECTRON-DIFFRACTION PATTERNS OF TL-BA-CA-CU-O WITH T/SUB C/ OF 117
400 K. THE SCATTERING HAS AN INTENSITY MAXIMUM AT THE MIDDLE BETWEEN TWO
400 FUNDAMENTAL SPOTS ALONG THE (100) DIRECTIONS AND ITS INTENSITY
400 INCREASES WITH DECREASING TEMPERATURE. THAT IS, THE TL OXIDE WITH
400 HIGH T/SUB C/ EXHIBITS SOFT PHONON BEHAVIOR.
500 BARIUM COMPOUNDS; CALCIUM COMPOUNDS; ELECTRON DIFFRACTION EXAMINATION
500 OF MATERIALS; HIGH-TEMPERATURE SUPERCONDUCTORS; SOFT MODES; THALLIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; SOFT PHONON MODE; THERMAL DIFFUSE
510 SCATTERING; HIGH-T/SUB C/ SUPERCONDUCTOR; TRANSVERSE PHONON;
510 ELECTRON-DIFFRACTION PATTERNS; TL-BA-CA-CU-O.
550 TLBACACUO/SS BA/SS CA/SS CU/SS TL/SS O/SS.
DOCUMENT= 1449
AUTH = MCHENRY
DT = 02
KN = B40891306919
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388077
002 B40891306919
010 JOURNAL PAPER; EXPERIMENTAL.
100 FLUX CREEP IN A POLYCRYSTALLINE BA/SUB 0.6/K/SUB 0.4/BIO/SUB 3/
100 SUPERCONDUCTOR.
200 MCHENRY, M.E.; MALEY, M.P.; KWEI, G.H.; THOMPSON, J.D.
220 LOS ALAMOS NAT. LAB., NM, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7339-42, REF.19
350 ISSN 0163-1829, CODEN PRBMDO
400 MAGNETIZATION CURVES HAVE BEEN MEASURED AS A FUNCTION OF TEMPERATURE
400 FOR A POLYCRYSTALLINE SAMPLE OF BA/SUB 0.6/K/SUB 0.4/BIO/SUB 3/.
400 THESE MEASUREMENTS REVEAL SIGNIFICANT REVERSIBILITY AT MODEST FIELDS
400 FOR ALL TEMPERATURES STUDIED. THE IRREVERSIBILITY LINE (H/SUP */, T*)
400 IS DETERMINED FOR THIS MATERIAL AND SHOWS THAT H* IS LESS THAN 0.8 T
400 AT ALL TEMPERATURES. THE LOGARITHMIC MAGNETIC RELAXATION RATE
400 A=DM/DLN(T) HAS BEEN STUDIED FOR THIS MATERIAL, AS A FUNCTION OF BOTH
400 FIELD AND TEMPERATURE. ANALYSIS USING THE FLUX-CREEP MODEL REVEALS
400 THE AVERAGE PINNING ENERGY U/SUB 0/ TO BE 0.08+OR-0.02 EV. THIS
400 EXTREMELY SMALL PINNING ENERGY IS USED TO EXPLAIN THE SMALL CRITICAL
400 CURRENT, ITS STRONG DEPENDENCE ON FIELD, AND THE SIGNIFICANTLY
400 REVERSIBLE BEHAVIOR IN THIS MATERIAL.
500 BARIUM COMPOUNDS; CRITICAL CURRENTS; FLUX CREEP; FLUX PINNING;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC RELAXATION; MAGNETISATION;
500 POTASSIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; MAGNETISATION; IRREVERSIBILITY LINE;
510 LOGARITHMIC MAGNETIC RELAXATION RATE; FLUX-CREEP MODEL; PINNING
510 ENERGY; CRITICAL CURRENT; REVERSIBLE BEHAVIOR; POLYCRYSTALLINE BA/SUB
510 0.6/K/SUB 0.4/BIO/SUB 3/ SUPERCONDUCTOR.
550 BA0.6K0.4BIO3/SS BA0.6/SS K0.4/SS BA/SS BI/SS O3/SS K/SS O/SS.
DOCUMENT= 1450
AUTH = MEYER
DT = 02
KN = B40891306920
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388078
002 B40891306920
010 JOURNAL PAPER; EXPERIMENTAL.
100 PHOTOEMISSION AND INVERSE RESONANT PHOTOEMISSION STUDIES OF TL/SUB
100 2/BA/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB 10+Y/.
200 MEYER, H.M., III; WAGENER, T.J.; WEAVER, J.H. / GINLEY, D.S.
220 DEPT. OF MATER. SCI. ? CHEM. ENG., MINNESOTA UNIV., MINNEAPOLIS, MN,
220 USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7343-6, REF.29
350 ISSN 0163-1829, CODEN PRBMDO
400 THE AUTHORS PRESENT PHOTOEMISSION AND INVERSE PHOTOEMISSION RESULTS
400 FOR SINGLE AND POLYCRYSTALLINE TL/SUB 2/BA/SUB 2-X/CA/SUB 2+X/CU/SUB
400 3/O/SUB 10+Y/. STUDIES OF THE OCCUPIED STATES REVEAL CU-O AND TL 6S
400 HYBRID STATES WITHIN APPROXIMATELY 8 EV OF THE FERMI LEVEL E/SUB F/.
400 TL 4F EMISSION CHARACTERISTIC OF A SINGLE CHEMICAL ENVIRONMENT, THE
400 CU 2P/SUB 3/2/ MAIN LINE AND SATELLITES, COMPLEX O 1S EMISSION
400 DERIVED FROM CHEMICALLY INEQUIVALENT OXYGEN SITES, AND CA AND BA
400 EMISSION REFLECTING CA-BA DISORDER WITHIN THE UNIT CELL WERE
400 OBSERVED. INVERSE PHOTOEMISSION RESULTS SHOW A LOW DENSITY OF STATES
400 WITHIN APPROXIMATELY 1 EV OF E/SUB F/ AND STRUCTURE AT APPROXIMATELY
400 3, APPROXIMATELY 7, 9.6, AND 14 EV ABOVE E/SUB F/ THAT IS ASSOCIATED
400 WITH TL 6P, BA 5D, CA 3D, AND BA 4F EMPTY LEVELS. RESONANT INVERSE
400 PHOTOEMISSION HIGHLIGHTS THE O 2P HOLES NEAR E/SUB F/. DIFFERENCES
400 AND SIMILARITIES TO BI/SUB 2/CA/SUB 1+X/SR/SUB 2-X/CU/SUB 2/O/SUB
400 8+Y/ ARE DISCUSSED.
500 BARIUM COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; INVERSE PHOTOEMISSION SPECTROSCOPY; PHOTOELECTRON
500 SPECTRA; THALLIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; PHOTOEMISSION; SINGLE CRYSTAL;
510 INVERSE RESONANT PHOTOEMISSION STUDIES; POLYCRYSTALLINE; OCCUPIED
510 STATES; 6S HYBRID STATES; FERMI LEVEL; DENSITY OF STATES; EMPTY
510 LEVELS; 2P HOLES; TL/SUB 2/BA/SUB 2/CA/SUB 2/CU/SUB 3/O/SUB 10+Y/;
510 BI/SUB 2/CA/SUB 1+X/SR/SUB 2-X/CU/SUB 2/O/SUB 8+Y/.
550 TL2BA2CA2CU3O/SS BA2/SS CA2/SS CU3/SS TL2/SS BA/SS CA/SS CU/SS TL/SS
550 O/SS; BI2CASRCU2O/SS BI2/SS CU2/SS BI/SS CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1451
AUTH = MORRIS
DT = 02
KN = B40891306921
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388079
002 B40891306921
010 JOURNAL PAPER; NEW DEVELOPMENT, EXPERIMENTAL.
100 EIGHT NEW HIGH-TEMPERATURE SUPERCONDUCTORS WITH THE 1:2:4 STRUCTURE.
200 MORRIS, D.E.; NICKEL, J.H.; WEI, J.Y.T.; ASMAR, N.G.; SCOTT, J.S.;
200 SCHEVEN, U.M.; HULTGREN, C.T.; MARKELZ, A.G. / POST, J.E.; HEANEY,
200 P.J.; VEBLEN, D.R.; HAZEN, R.M.
220 LAWRENCE BERKELEY LAB., BERKELEY, CA, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7347-50, REF.20
350 ISSN 0163-1829, CODEN PRBMDO
400 NEW HIGH-TEMPERATURE SUPERCONDUCTING COMPOUNDS RBA/SUB 2/CU/SUB
400 4/O/SUB 8/ (R=ND, SM, EU, GD, DY, HO, ER, AND TM) WHICH SHARE THE
400 1:2:4 STRUCTURE OF YBA/SUB 2/CU/SUB 4/O/SUB 8/ ARE BULK SYNTHESIZED
400 USING A NEW HIGH-PRESSURE OXYGEN TECHNIQUE. ALL COMPOUNDS SHOW
400 SUBSTANTIAL MEISSNER DIAMAGNETISM ((3-25)*10/SUP -4/ EMU/G AT 20 K).
400 CRITICAL TEMPERATURES (57-81 K) VARY INVERSELY WITH ION SIZE
400 (OPPOSITE TO 1:2:3), AND DIRECTLY WITH ORTHORHOMBIC DISTORTION (WHICH
400 IS MUCH SMALLER THAN IN CORRESPONDING 1:2:3 COMPOUNDS). R/SUB
400 2/BA/SUB 4/CU/SUB 7/O/SUB X/ COMPOUNDS (WITH ALTERNATING BLOCKS OF
400 1:2:3 AND 1:2:4) WERE ALSO PREPARED. THE VARIABLE OXYGEN
400 STOICHIOMETRY OF 1:2:3 IS NOT SHARED BY THE 1:2:4 COMPOUNDS.
500 BARIUM COMPOUNDS; DYSPROSIUM COMPOUNDS; ERBIUM COMPOUNDS; EUROPIUM
500 COMPOUNDS; GADOLINIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 HOLMIUM COMPOUNDS; MEISSNER EFFECT; NEODYMIUM COMPOUNDS; RARE EARTH
500 COMPOUNDS; SAMARIUM COMPOUNDS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; THULIUM COMPOUNDS.
510 CRITICAL TEMPERATURES; HIGH-TEMPERATURE SUPERCONDUCTORS; 1:2:4
510 STRUCTURE; MEISSNER DIAMAGNETISM; ION SIZE; ORTHORHOMBIC DISTORTION;
510 STOICHIOMETRY; 57 TO 81 K; NDBA/SUB 2/CU/SUB 4/O/SUB 8/; SMBA/SUB
510 2/CU/SUB 4/O/SUB 8/; EUBA/SUB 2/CU/SUB 4/O/SUB 8/; GDBA/SUB 2/CU/SUB
510 4/O/SUB 8/; DYBA/SUB 2/CU/SUB 4/O/SUB 8/; HOBA/SUB 2/CU/SUB 4/O/SUB
510 8/; ERBA/SUB 2/CU/SUB 4/O/SUB 8/; TMBA/SUB 2/CU/SUB 4/O/SUB 8/.
550 NDBA2CU4O8/SS BA2/SS CU4/SS BA/SS CU/SS ND/SS O8/SS O/SS;
550 SMBA2CU4O8/SS BA2/SS CU4/SS BA/SS CU/SS O8/SS SM/SS O/SS;
550 EUBA2CU4O8/SS BA2/SS CU4/SS BA/SS CU/SS EU/SS O8/SS O/SS;
550 GDBA2CU4O8/SS BA2/SS CU4/SS BA/SS CU/SS GD/SS O8/SS O/SS;
550 DYBA2CU4O8/SS BA2/SS CU4/SS BA/SS CU/SS DY/SS O8/SS O/SS;
550 HOBA2CU4O8/SS BA2/SS CU4/SS BA/SS CU/SS HO/SS O8/SS O/SS;
550 ERBA2CU4O8/SS BA2/SS CU4/SS BA/SS CU/SS ER/SS O8/SS O/SS;
550 TMBA2CU4O8/SS BA2/SS CU4/SS BA/SS CU/SS O8/SS TM/SS O/SS.
560 TEMPERATURE 5.7 E+01 TO 8.1 E+01 K.
DOCUMENT= 1452
AUTH = NISHIHAR
DT = 02
KN = B40891306922
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388080
002 B40891306922
010 JOURNAL PAPER; EXPERIMENTAL.
100 PHONON ECHOES IN POWDERS OF HIGH-T/SUB C/ SUPERCONDUCTING YBA/SUB
100 2/CU/SUB 3/O/SUB 7- DELTA /.
200 NISHIHARA, H. / HAYASHI, K.; OKUDA, Y.; KAJIMURA, K.
220 INST. FOR SOLID STATE PHYS., TOKYO UNIV., JAPAN
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7351-3, REF.14
350 ISSN 0163-1829, CODEN PRBMDO
400 STRONG RF PHONON ECHOES HAVE BEEN OBSERVED IN THE SUPERCONDUCTING
400 STATE OF POWDERS OF HIGH-T/SUB C/ YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA
400 /. THE AUTHORS SUGGEST THAT THE COUPLING MECHANISM BETWEEN RF FIELDS
400 AND ACOUSTIC MODES IS DIFFERENT FROM THAT IN THE USUAL PHONON ECHOES,
400 JUDGING FROM THE SUDDEN DISAPPEARANCE OF THE ECHOES AT T/SUB C/=90 K
400 AND FROM THE ANGULAR DEPENDENCE OF THE ECHO INTENSITY. THE
400 TEMPERATURE DEPENDENCE OF T/SUB 2//SUP -1/ IS TENTATIVELY ASCRIBED TO
400 THE ULTRASONIC ATTENUATION DUE TO ELECTRONS, AND THE ENERGY GAP
400 PARAMETER 2 DELTA /K/SUB B/T/SUB C/ IS ESTIMATED TO BE 3-7.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; LATTICE PHONONS;
500 SUPERCONDUCTING ENERGY GAP; ULTRASONIC ABSORPTION; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; POWDERS; HIGH-T/SUB C/
510 SUPERCONDUCTING; RF PHONON ECHOES; COUPLING MECHANISM; ACOUSTIC
510 MODES; ANGULAR DEPENDENCE; TEMPERATURE DEPENDENCE; ULTRASONIC
510 ATTENUATION; ENERGY GAP PARAMETER; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA
510 /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1453
AUTH = OHTA
DT = 02
KN = B40891306923
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388081
002 B40891306923
010 JOURNAL PAPER; EXPERIMENTAL.
100 INVERSE PHOTOEMISSION STUDY OF BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB 8/.
200 OHTA, H.; TAKAHASHI, T.; MURATA, K.; MATSUYAMA, H.; SUZUKI, S.;
200 OKABE, Y.; KATAYAMA-YOSHIDA, H.
220 DEPT. OF PHYS., TOHOKU UNIV., SENDAI, JAPAN
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7354-5, REF.13
350 ISSN 0163-1829, CODEN PRBMDO
400 AN INVERSE PHOTOEMISSION SPECTRUM OF BI/SUB 2/SR/SUB 2/CACU/SUB
400 2/O/SUB 8/ IS PRESENTED. THE SPECTRUM SHOWS A CLEAR FERMI-EDGE
400 STRUCTURE IN CONTRAST TO THOSE REPORTED FOR YBA/SUB 2/CU/SUB 3/O/SUB
400 7/ AND LA/SUB 1.8/SR/SUB 0.2/CUO/SUB 4/, GIVING DIRECT EVIDENCE FOR
400 THE EXISTENCE OF THE FERMI-LIQUID STATES IN BI/SUB 2/SR/SUB
400 2/CACU/SUB 2/O/SUB 8/.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; INVERSE PHOTOEMISSION SPECTROSCOPY; STRONTIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; INVERSE PHOTOEMISSION; FERMI-EDGE
510 STRUCTURE; FERMI-LIQUID STATES; BI/SUB 2/SR/SUB 2/CACU/SUB 2/O/SUB
510 8/.
550 BI2SR2CACU2O8/SS BI2/SS CU2/SS SR2/SS BI/SS CA/SS CU/SS O8/SS SR/SS
550 O/SS.
DOCUMENT= 1454
AUTH = PHILLIPS
DT = 02
KN = B40891306924
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388082
002 B40891306924
010 JOURNAL PAPER; THEORETICAL.
100 DIRECT EVIDENCE FOR THE QUANTUM INTERLAYER DEFECT-ASSISTED
100 PERCOLATION MODEL OF CUPRATE HIGH-T/SUB C/ SUPERCONDUCTIVITY.
200 PHILLIPS, J.C.
220 AT?T BELL LABS., MURRAY HILL, NJ, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7356-8, REF.18
350 ISSN 0163-1829, CODEN PRBMDO
400 RECENT RAMAN AND INFRARED DATA ARE USED TO ARGUE THAT IN YBA/SUB
400 2/CU/SUB 3/O/SUB 7/ METALLIC PATHS ARE NOT CONFINED TO CU PLANES BUT
400 MUST CROSS BA PLANES AT SOME POINTS, POSSIBLY BECAUSE OF THE PRESENCE
400 OF DEFECTS SUCH AS OXYGEN VACANCIES NEAR THOSE POINTS.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; INFRARED SPECTRA
500 OF INORGANIC SOLIDS; PERCOLATION; RAMAN SPECTRA OF INORGANIC SOLIDS;
500 YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; O VACANCIES; RAMAN DATA; QUANTUM
510 INTERLAYER DEFECT-ASSISTED PERCOLATION MODEL; CUPRATE HIGH-T/SUB C/
510 SUPERCONDUCTIVITY; INFRARED DATA; METALLIC PATHS; CU PLANES; BA
510 PLANES; DEFECTS; YBA/SUB 2/CU/SUB 3/O/SUB 7/.
550 YBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS.
DOCUMENT= 1455
AUTH = RUCKMAN
DT = 02
KN = B40891306925
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388083
002 B40891306925
010 JOURNAL PAPER; EXPERIMENTAL.
100 RESONANT-PHOTOEMISSION STUDY OF BA/SUB 0.6/K/SUB 0.4/BIO/SUB 3/.
200 RUCKMAN, M.W.; DI MARZIO, D. / JEON, Y.; LIANG, G.; CHEN, J.; CROFT,
200 M.; HEGDE, M.S.
220 BROOKHAVEN NAT. LAB., UPTON, NY, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7359-62, REF.32
350 ISSN 0163-1829, CODEN PRBMDO
400 SYNCHROTRON-RADIATION PHOTOEMISSION RESULTS FOR THE 29-K
400 SUPERCONDUCTOR NA/SUB 0.6/K/SUB 0.4/BIO/SUB 3/ ARE REPORTED FOR THE
400 14- TO 135-EV PHOTON-ENERGY RANGE. RESONANT PHOTOEMISSION IS USED TO
400 IDENTIFY SHALLOW CORE LEVELS AND ATOMIC CONTRIBUTIONS TO THE VALENCE
400 BAND. THE RESULTS ARE COMPARED TO A RECENTLY PUBLISHED BAND-STRUCTURE
400 CALCULATION.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; PHOTOELECTRON
500 SPECTRA; POTASSIUM COMPOUNDS; VALENCE BANDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; RESONANT PHOTOEMISSION; SHALLOW CORE
510 LEVELS; ATOMIC CONTRIBUTIONS; VALENCE BAND; BAND-STRUCTURE; 29 K; 14
510 TO 135 EV; BA/SUB 0.6/K/SUB 0.4/BIO/SUB 3/.
550 BA0.6K0.4BIO3/SS BA0.6/SS K0.4/SS BA/SS BI/SS O3/SS K/SS O/SS.
560 TEMPERATURE 2.9 E+01 K; ELECTRON VOLT ENERGY 1.4 E+01 TO 1.35 E+02
560 EV.
DOCUMENT= 1456
AUTH = SHAKED
DT = 02
KN = B40891306926
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388084
002 B40891306926
010 JOURNAL PAPER; THEORETICAL.
100 THEORY FOR OXYGEN CONTENT AND ORDERING IN YBA/SUB 2/CU/SUB 3/O/SUB
100 6+X/ IN EQUILIBRIUM WITH OXYGEN GAS.
200 SHAKED, H.; JORGENSEN, J.D.; FABER, J., JR.; HINKS, D.G.; DABROWSKI,
200 B.
220 ARGONNE NAT. LAB., IL, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7363-6, REF.16
350 ISSN 0163-1829, CODEN PRBMDO
400 A MODEL USING STATISTICAL THERMODYNAMICS IS PRESENTED WHICH
400 QUANTITATIVELY DESCRIBES THE OXYGEN CONTENT AND ORDERING IN YBA/SUB
400 2/CU/SUB 3/O/SUB 6+X/. THIS MODEL IS IN GOOD AGREEMENT WITH
400 EXPERIMENTS WITHIN A BROAD RANGE OF TEMPERATURE AND OXYGEN PARTIAL
400 PRESSURE. IN THE FRAMEWORK OF THIS MODEL IT IS FOUND THAT THE SITE
400 (BINDING) ENERGY OF THE OXYGEN IN THE LATTICE IS QUADRATIC IN THE
400 OXYGEN CONCENTRATION AND LINEAR IN THE TEMPERATURE. A POSSIBLE
400 RELATION OF THIS DEPENDENCE TO THE ELECTRONIC STRUCTURE OF YBA/SUB
400 2/CU/SUB 3/O/SUB 6+X/ IS DISCUSSED.
500 BAND STRUCTURE OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS; BARIUM
500 COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; O CONTENT; O ORDERING; BINDING
510 ENERGY; MODEL; STATISTICAL THERMODYNAMICS; PARTIAL PRESSURE;
510 ELECTRONIC STRUCTURE; YBA/SUB 2/CU/SUB 3/O/SUB 6+X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1457
AUTH = TAKANO
DT = 02
KN = B40891306927
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388085
002 B40891306927
010 JOURNAL PAPER; THEORETICAL.
100 ORIGIN OF RESONATING-VALENCE-BOND STATES FOR A HUBBARD-TYPE MODEL.
200 TAKANO, K. / SANO, K.
220 DEPT. OF PHYS., NAGOYA UNIV., JAPAN
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7367-70, REF.12
350 ISSN 0163-1829, CODEN PRBMDO
400 BASED ON NUMERICAL DIAGONALIZATION OF A HUBBARD-TYPE MODEL, THE
400 AUTHORS PROPOSE THAT, EVEN WITHOUT EXCHANGE INTERACTIONS, A SPECIAL
400 KIND OF HOLE MOTION GENERATES A RESONATING-VALENCE-BOND (RVB) STATE.
400 THIS HOLE MOTION IS INDUCED BY THE SECOND-NEIGHBOR TRANSFER IN A
400 SQUARE LATTICE. TWO TYPES OF RVB STATES APPEAR: ONE CONSISTS ONLY OF
400 SHORT SINGLET PAIRS AND THE OTHER INCLUDES A SMALL AMOUNT OF LONG
400 SINGLET PAIRS.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; HUBBARD MODEL; LATTICE THEORY AND
500 STATISTICS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; RESONATING-VALENCE-BOND STATES;
510 HUBBARD-TYPE MODEL; NUMERICAL DIAGONALIZATION; EXCHANGE INTERACTIONS;
510 HOLE MOTION; SECOND-NEIGHBOR TRANSFER; SQUARE LATTICE; RVB STATES;
510 SHORT SINGLET PAIRS; LONG SINGLET PAIRS.
DOCUMENT= 1458
AUTH = TAKIGAWA
DT = 02
KN = B40891306928
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388086
002 B40891306928
010 JOURNAL PAPER; EXPERIMENTAL.
100 SPIN SUSCEPTIBILITY IN SUPERCONDUCTING YBA/SUB 2/CU/SUB 3/O/SUB Y/
100 FROM /SUP 63/CU KNIGHT SHIFT.
200 TAKIGAWA, M.; HAMMEL, P.C.; HEFFNER, R.H.; FISK, Z.
220 LOS ALAMOS NAT. LAB., NM, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7371-4, REF.21
350 ISSN 0163-1829, CODEN PRBMDO
400 THE /SUP 63/CU KNIGHT SHIFT IN YBA/SUB 2/CU/SUB 3/O/SUB 7/ HAS BEEN
400 MEASURED AT BOTH CU(1) (CHAIN) AND CU(2) (PLANE) SITES, USING A
400 UNIAXIALLY ALIGNED POWDER. THE ISOTROPIC PART OF THE SPIN KNIGHT
400 SHIFT (K/SUB S/) WAS FOUND TO BE POSITIVE FOR BOTH SITES, SUGGESTING
400 LARGE TRANSFERRED HYPERFINE FIELDS FROM OXYGEN P STATES. THE KNIGHT
400 SHIFTS AT BOTH SITES SHOW SIGNIFICANT CHANGE BELOW T/SUB C/,
400 INDICATING IMPORTANT ROLES OF BOTH THE PLANES AND CHAINS IN THE
400 SUPERCONDUCTIVITY. DESPITE THE UNCERTAINTY IN THE DIAMAGNETIC
400 SCREENING, THE AXIAL PART OF K/SUB S/ AT CU(2) SITES IS FOUND TO SHOW
400 LINEAR-T BEHAVIOR AT LOW TEMPERATURES.
500 BARIUM COMPOUNDS; CRYSTAL HYPERFINE FIELD INTERACTIONS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; KNIGHT SHIFT; MAGNETIC
500 SUSCEPTIBILITY; POWDERS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; SPIN SUSCEPTIBILITY; /SUP 63/CU
510 KNIGHT SHIFT; UNIAXIALLY ALIGNED POWDER; HYPERFINE FIELDS; PLANES;
510 CHAINS; DIAMAGNETIC SCREENING; LOW TEMPERATURES; YBA/SUB 2/CU/SUB
510 3/O/SUB Y/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1459
AUTH = ZHANG
DT = 02
KN = B40891306929
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388087
002 B40891306929
010 JOURNAL PAPER; THEORETICAL.
100 EXACT MAPPING FROM A TWO-BAND MODEL FOR CU OXIDES TO THE SINGLE-BAND
100 HUBBARD MODEL.
200 ZHANG, F.C.
220 DEPT. OF PHYS., CINCINNATI UNIV., OH, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7375-7, REF.7
350 ISSN 0163-1829, CODEN PRBMDO
400 THE ENERGY SPECTRUM OF A MOBILE HOLE IN A TWO-BAND MODEL FOR CU
400 OXIDES, IN THE LIMIT WHERE THE VIRTUAL TRANSITIONS OF TWO HOLES ON
400 THE CU ATOMS DOMINATE, IS SHOWN BY USING AN EXACT MAPPING TO BE
400 IDENTICAL TO THAT OF AN EFFECTIVE HAMILTONIAN OF THE STRONGLY
400 CORRELATED SINGLE-BAND HUBBARD MODEL.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; HUBBARD MODEL.
510 HIGH TEMPERATURE SUPERCONDUCTORS; TWO-BAND MODEL; CU OXIDES;
510 SINGLE-BAND HUBBARD MODEL; ENERGY SPECTRUM; MOBILE HOLE; EFFECTIVE
510 HAMILTONIAN.
550 CU/SS O/SS.
DOCUMENT= 1460
AUTH = KWEI
DT = 02
KN = B40891306930
LG = ENGL
SN = ISSN 0163-1829
YR = 89
000 3388088
002 B40891306930
010 JOURNAL PAPER; EXPERIMENTAL.
100 LOW-TEMPERATURE STRUCTURE OF BA/SUB 0.6/K/SUB 0.4/BIO/SUB 3/.
200 KWEI, G.H.; GOLDSTONE, J.A.; LAWSON, A.C., JR.; THOMPSON, J.D.;
200 WILLIAMS, A.
220 LOS ALAMOS NAT. LAB., NM, USA
310 PHYS. REV. B, CONDENS. MATTER (USA)
330 1 APRIL 1989. VOL.39, NO.10, PT.B, P.7378-80, REF.18
350 ISSN 0163-1829, CODEN PRBMDO
400 THE NEWLY DISCOVERED COPPER-FREE SUPERCONDUCTOR BA/SUB 1-X/K/SUB
400 X/BIO/SUB 3/ HAS THE CATIO/SUB 3/-TYPE STRUCTURE AT ROOM TEMPERATURE,
400 BUT ITS STRUCTURE AT OR BELOW T/SUB C/ IS NOT KNOWN. THEY REPORT
400 RIETVELD REFINEMENTS OF THE STRUCTURES FIT TO
400 NEUTRON-POWDER-DIFFRACTION DATA TAKEN AT 297 AND 10 K FOR A SAMPLE
400 WITH X=0.4. THEY FIND THAT THE STRUCTURE REMAINS CUBIC AT 10 K, THE
400 DOPANT LEVEL REMAINS CLOSE TO THAT EXPECTED FROM THE STARTING
400 STOICHIOMETRY, THE OXYGEN SITES ARE ESSENTIALLY FULLY OCCUPIED, AND
400 THE ANISOTROPIC THERMAL ELLIPSOIDS REMAIN OBLATE WITH THE UNIQUE AXIS
400 ALONG THE BI-O-BI BONDS.
500 BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; POTASSIUM COMPOUNDS.
510 CRYSTAL STRUCTURE; LOW TEMPERATURE STRUCTURE; HIGH TEMPERATURE
510 SUPERCONDUCTOR; CATIO/SUB 3/-TYPE STRUCTURE; RIETVELD REFINEMENTS;
510 NEUTRON-POWDER-DIFFRACTION; DOPANT LEVEL; STOICHIOMETRY; ANISOTROPIC
510 THERMAL ELLIPSOIDS; BI-O-BI BONDS; 297 K; 10 K; BA/SUB 0.6/K/SUB
510 0.4/BIO/SUB 3/.
550 BA0.6K0.4BIO3/SS BA0.6/SS K0.4/SS BA/SS BI/SS O3/SS K/SS O/SS.
560 TEMPERATURE 2.97 E+02 K; TEMPERATURE 1.0 E+01 K.
DOCUMENT= 1461
AUTH = YASUOKA
DT = 02
KN = B40891306939
LG = ENGL
SN = ISSN 0141-1594
YR = 89
000 3388097
002 B40891306939
010 JOURNAL PAPER; EXPERIMENTAL.
100 CU CHEMISTRY OF YBA/SUB 2/CU/SUB 3/O/SUB 6+X/ INVESTIGATED BY NUCLEAR
100 QUADRUPOLE RESONANCE.
200 YASUOKA, H.; SASAKI, S.; IMAI, T.; SHIMIZU, T. / UEDA, Y.; KOSUGE, K.
220 INST. FOR SOLID STATE PHYS., TOKYO UNIV., JAPAN
310 PHASE TRANSIT. (UK)
330 1989. VOL.15, NO.4, P.183-99, REF.21
350 ISSN 0141-1594, CODEN PHTRDP
400 THE NUCLEAR QUADRUPOLE RESONANCE (NQR) TECHNIQUE HAS BEEN UTILIZED TO
400 CHARACTERIZE THE LOCAL OXYGEN COORDINATION OF INEQUIVALENT CU SITES
400 IN YBA/SUB 2/CU/SUB 3/O/SUB 6+X/(00.3, WHERE THE COMPOUNDS ARE METALLIC BUT DO NOT EXHIBIT
400 THE SUPERCONDUCTIVITY. THESE DIFFERENCES ARE DISCUSSED IN RELATION TO
400 THE X-DEPENDENCE OF THE ELECTRONIC STATE OF THE SYSTEM. THE BEHAVIORS
400 OF THESE QUANTITIES OF LA/SUB 2/SRCU/SUB 2/O/SUB Y/, WHICH DOES NOT
400 EXHIBIT SUPERCONDUCTIVITY, ARE QUITE SIMILAR TO THOSE OF LA/SUB
400 2-X/SR/SUB X/CUO/SUB 4/ WITH X>0.30. THE INVERSE OF R/SUB H/ HAS BEEN
400 FOUND TO BE LINEAR IN TEMPERATURE T, WHICH GIVES THE AUTHORS AN
400 EVIDENCE THAT THE RELATION R/SUB H//SUP -1/ ALPHA T IS NOT
400 CHARACTERISTIC OF HIGH-T/SUB C/ OXIDE SUPERCONDUCTORS.
500 ELECTRICAL CONDUCTIVITY OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS;
500 HALL EFFECT; HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM COMPOUNDS;
500 MAGNETIC SUSCEPTIBILITY; STRONTIUM COMPOUNDS; THERMOELECTRIC EFFECTS
500 IN SEMICONDUCTORS AND INSULATORS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; NORMAL STATE PROPERTIES; ELECTRICAL
510 RESISTIVITY; MAGNETIC SUSCEPTIBILITY; COMPOSITION DEPENDENCE;
510 TEMPERATURE DEPENDENCE; HALL COEFFICIENTS; THERMOELECTRIC POWERS;
510 ELECTRONIC STATE; HIGH-T/SUB C/ OXIDE SUPERCONDUCTORS; LA/SUB
510 2-X/SR/SUB X/CUO/SUB 4/; LA/SUB 2/SRCU/SUB 2/O/SUB Y/.
550 LASRCUO4/SS CU/SS LA/SS O4/SS SR/SS O/SS; LA2SRCU2O/SS CU2/SS LA2/SS
550 CU/SS LA/SS SR/SS O/SS.
DOCUMENT= 1476
AUTH = ONODA
DT = 02
KN = B40891307148
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3388306
002 B40891307148
010 JOURNAL PAPER; EXPERIMENTAL.
100 EPR STUDY ON DYNAMICS OF ELECTRONS IN SUPERCONDUCTING AND NORMAL
100 METALLIC (LA/SUB 1-X/SR/SUB X/)/SUB 2/CUO/SUB 4- DELTA / SYSTEM.
200 ONODA, M.; SATO, M.
220 INST. FOR MOLECULAR SCI., OKAZAKI NAT. RES. INST., JAPAN
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.3, P.309-13, REF.9
350 ISSN 0038-1098, CODEN SSCOA4
400 AN EPR STUDY WAS CARRIED OUT FOR HIGH-T/SUB C/ SUPERCONDUCTING AND
400 NORMAL METALLIC (LA/SUB 1-X/SR/SUB X/)/SUB 2/CUO/SUB 4- DELTA /
400 SYSTEM, WHERE MAGNETIC MN IONS WERE DOPED AS A MICROSCOPIC PROBE. A
400 DISTINCT CHANGE OF THE RELAXATION RATES WAS FOUND AT THE TRANSITION
400 FROM THE SUPERCONDUCTING TO NORMAL METALLIC PHASE WITH INCREASING X.
400 IT IS ATTRIBUTABLE TO THE DIFFERENCE BETWEEN THE MAGNITUDES OF SPIN
400 FLUCTUATION IN THESE PHASES. THE KORRINGA RELATION SEEMS TO HOLD FOR
400 THE NORMAL METALLIC PHASE.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM COMPOUNDS; MANGANESE;
500 PARAMAGNETIC RESONANCE OF IRON GROUP IONS AND IMPURITIES; SPIN
500 DYNAMICS; STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; COMPOSITION DEPENDENCE; ELECTRON
510 DYNAMICS; SUPERCONDUCTING PHASE; ELECTRON PARAMAGNETIC RESONANCE; EPR
510 STUDY; MAGNETIC MN IONS; MICROSCOPIC PROBE; RELAXATION RATES;
510 TRANSITION; SPIN FLUCTUATION; KORRINGA RELATION; NORMAL METALLIC
510 PHASE; (LA/SUB 1-X/SR/SUB X/)/SUB 2/CUO/SUB 4- DELTA / SYSTEM;
510 LASRCUO:MN.
550 LASRCUO:MN/SS LASRCUO/SS CU/SS LA/SS MN/SS SR/SS O/SS MN/EL MN/DOP;
550 LASRCUO/SS CU/SS LA/SS SR/SS O/SS.
DOCUMENT= 1477
AUTH = GOLDSTEI
DT = 02
KN = B40891307149
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3388307
002 B40891307149
010 JOURNAL PAPER; EXPERIMENTAL.
100 PRESSURE DEPENDENCE OF SUPERCONDUCTIVITY IN SINGLE-CRYSTAL BI/SUB
100 2/(SR,CA)/SUB 3/CU/SUB 2/O/SUB 8/.
200 GOLDSTEIN, H.F.; BOURNE, L.C.; YU, P.Y.; ZETTL, A.
220 DEPT. OF PHYS., CALIFORNIA UNIV., BERKELEY, CA, USA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.3, P.321-3, REF.15
350 ISSN 0038-1098, CODEN SSCOA4
400 THE PRESSURE DEPENDENCE OF THE SUPERCONDUCTING TRANSITION TEMPERATURE
400 (T/SUB C/) OF A SINGLE-CRYSTAL SAMPLE OF BI/SUB 2/(SR,CA)/SUB
400 3/CU/SUB 2/O/SUB 8/ WAS MEASURED UP TO 42 KBAR. T/SUB C/ FIRST
400 INCREASED SLIGHTLY WITH PRESSURE, REACHING A MAXIMUM AT AROUND 10
400 KBAR, AND THEN DECREASED WITH INCREASING PRESSURE AT A RATE OF ABOUT
400 0.05 K/KBAR. THIS NON-LINEAR PRESSURE DEPENDENCE OF T/SUB C/ IS
400 DISCUSSED WITHIN A TWO-DIMENSIONAL BCS MODEL, AND WITHIN TWO OF THE
400 RESONATING-VALENCE-BOND MODELS OF HIGH-T/SUB C/ SUPERCONDUCTIVITY.
500 BCS THEORY; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; HIGH-PRESSURE
500 EFFECTS IN SOLIDS; HIGH-TEMPERATURE SUPERCONDUCTORS; STRONTIUM
500 COMPOUNDS; SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; SINGLE-CRYSTAL; PRESSURE
510 DEPENDENCE; SUPERCONDUCTING TRANSITION TEMPERATURE; TWO-DIMENSIONAL
510 BCS MODEL; RESONATING-VALENCE-BOND MODELS; 42 KBAR; 10 KBAR; BI/SUB
510 2/(SRCA)/SUB 3/CU/SUB 2/O/SUB 8/.
550 BI2SRCACU2O8/SS BI2/SS CU2/SS BI/SS CA/SS CU/SS O8/SS SR/SS O/SS.
560 PRESSURE 4.2 E+09 PA; PRESSURE 1.0 E+09 PA.
DOCUMENT= 1478
AUTH = HOFMANN
DT = 02
KN = B40891307150
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3388308
002 B40891307150
010 JOURNAL PAPER; THEORETICAL.
100 EVIDENCE FOR TWO GAPS IN THE SUPERCONDUCTOR YBA/SUB 2/CU/SUB 3/O/SUB
100 7- DELTA /.
200 HOFMANN, U.; KELLER, J.; RENK, K.; SCHUTZMANN, J.; OSE, W.
220 FAKULTAT FUR PHYS., REGENSBURG UNIV., WEST GERMANY
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.3, P.325-7, REF.6
350 ISSN 0038-1098, CODEN SSCOA4
400 RECENT FAR-INFRARED AND TUNNELING EXPERIMENTS ON SUPERCONDUCTING
400 YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / INDICATE THE EXISTENCE OF TWO
400 ENERGY GAPS IN THE SUPERCONDUCTING STATE. IN THIS COMMUNICATION THE
400 AUTHORS PRESENT A THEORETICAL MODEL WHICH CAN EXPLAIN THE OCCURRENCE
400 OF TWO ENERGY GAPS. IT IS BASED ON THE DOUBLE-LAYER STRUCTURE OF
400 YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / AND ASSUMES TWO DIFFERENT TYPES
400 OF PAIRING FOR ELECTRONS IN THE SAME AND IN DIFFERENT CUO/SUB 2/
400 LAYERS.
500 BARIUM COMPOUNDS; COOPER PAIRS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC
500 COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; INFRARED SPECTRA OF
500 INORGANIC SOLIDS; SUPERCONDUCTING ENERGY GAP; SUPERCONDUCTIVE
500 TUNNELLING; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; ELECTRON PAIRING; FAR IR
510 PROPERTIES; TUNNELING; TWO ENERGY GAPS; SUPERCONDUCTING STATE;
510 THEORETICAL MODEL; DOUBLE-LAYER STRUCTURE; CUO/SUB 2/ LAYERS; YBA/SUB
510 2/CU/SUB 3/O/SUB 7- DELTA /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1479
AUTH = YUAN
DT = 02
KN = B40891307151
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3388309
002 B40891307151
010 JOURNAL PAPER; EXPERIMENTAL.
100 EPR OF BISRCACU/SUB 2/O/SUB Y/ HIGH T/SUB C/ SUPERCONDUCTOR.
200 YUAN SONGLIU / ZHENG JIAQI; JIN SIZHAO; GUAN WEIYAN
220 DEPT. OF PHYS., UNIV. OF SCI. ? TECHNOL. OF CHINA, HEFEI, CHINA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.3, P.329-31, REF.11
350 ISSN 0038-1098, CODEN SSCOA4
400 THE EPR OF THE NOMINAL BISRCACU/SUB 2/O/SUB Y/ HIGH T/SUB C/
400 SUPERCONDUCTOR AT DIFFERENT TEMPERATURES IS INVESTIGATED. IT IS FOUND
400 THAT THERE ARE TWO EPR SIGNALS WITH DIFFERENT BEHAVIORS IN THIS
400 SAMPLE. ONE OF THEM SHIFTS GRADUALLY TOWARD HIGHER MAGNETIC FIELD AND
400 ITS LANDE FACTOR G-VALUE IS DECREASED FROM 2.78 TO 2.24 WHEN THE
400 TEMPERATURE IS RAISED FROM 115 K TO 310 K. THE RESONANCE MAGNETIC
400 FIELD OF ANOTHER SIGNAL IS ALMOST INDEPENDENT OF TEMPERATURE AND ITS
400 G-VALUE IS CLOSE TO ONE OF FREE ELECTRON. THERE IS ONLY ZERO FIELD
400 SIGNAL BELOW T/SUB C/ FOR THIS SAMPLE AND ITS INTENSITY IS INCREASED
400 WITH DECREASING TEMPERATURE. THE AUTHORS PROPOSE A POSSIBLE
400 INTERPRETATION FOR THESE PHENOMENA BASED ON ELECTRON TRANSFER BETWEEN
400 COPPER ION AND OXYGEN ION IN THE CU-O PLANE.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHARGE TRANSFER STATES;
500 G-FACTOR; HIGH-TEMPERATURE SUPERCONDUCTORS; PARAMAGNETIC RESONANCE;
500 STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; ELECTRON PARAMAGNETIC RESONANCE;
510 TEMPERATURE DEPENDENCE; EPR; LANDE FACTOR G-VALUE; RESONANCE MAGNETIC
510 FIELD; ZERO FIELD SIGNAL; ELECTRON TRANSFER; CU-O PLANE; 115 TO 310
510 K; BISRCACU/SUB 2/O/SUB Y/.
550 BISRCACU2O/SS CU2/SS BI/SS CA/SS CU/SS SR/SS O/SS.
560 TEMPERATURE 1.15 E+02 TO 3.1 E+02 K.
DOCUMENT= 1480
AUTH = ZENG
DT = 02
KN = B40891307152
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3388310
002 B40891307152
010 JOURNAL PAPER; EXPERIMENTAL.
100 INTERNAL FRICTION STUDY OF HIGH T/SUB C/ BSCCO CERAMIC SUPERCONDUCTOR
100 WITHIN THE TEMPERATURE RANGE 88-623 K.
200 ZENG, W.G.; ZHANG, J.X.; LIN, G.M.; DU, C.L. / FUNG, P.C.W.; SIU,
200 G.G.
220 DEPT. OF PHYS., ZHONGSHAN UNIV., CHINA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.3, P.333-5, REF.5
350 ISSN 0038-1098, CODEN SSCOA4
400 USING INTERNAL FRICTION AND SHEAR MODULUS MEASUREMENTS, THE AUTHORS
400 STUDIED CERTAIN CHARACTERISTICS OF RELAXATION AND PHASE-LIKE
400 TRANSITIONS WHICH COULD ACCOMPANY THE CONDUCTOR-SUPERCONDUCTOR
400 TRANSITION OF BISRCACU/SUB 2/O/SUB Y/ WHEN SAMPLES WERE SINTERED AT
400 DIFFERENT TEMPERATURES AND WENT THROUGH THERMOCYCLES.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CERAMICS; HEAT TREATMENT;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; INTERNAL FRICTION; SHEAR MODULUS;
500 SINTERING; STRONTIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; SINTERING TEMPERATURE; CERAMIC
510 SUPERCONDUCTOR; INTERNAL FRICTION; SHEAR MODULUS; RELAXATION;
510 PHASE-LIKE TRANSITIONS; CONDUCTOR-SUPERCONDUCTOR TRANSITION;
510 THERMOCYCLES; 80 TO 623 K; BISRCACU/SUB 2/O/SUB Y/.
550 BISRCACU2O/SS CU2/SS BI/SS CA/SS CU/SS SR/SS O/SS.
560 TEMPERATURE 8.0 E+01 TO 6.23 E+02 K.
DOCUMENT= 1481
AUTH = JANDL
DT = 02
KN = B40891307153
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3388311
002 B40891307153
010 JOURNAL PAPER; EXPERIMENTAL.
100 THE INFLUENCE OF THE QUASI-TWO-DIMENSIONAL CHARACTER OF CARRIERS AND
100 CORROSION EFFECTS ON MID-INFRARED REFLECTANCE OF YBA/SUB 2/CU/SUB
100 3/O/SUB 7-X/.
200 JANDL, S.; BANVILLE, M.; DUFOUR, P.; GAGNON, R.
220 DEPT. DE PHYS. DU SOLIDE, SHERBROOKE UNIV., QUE., CANADA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.3, P.337-40, REF.26
350 ISSN 0038-1098, CODEN SSCOA4
400 THE OPTICAL TRANSPORT PROPERTIES OF THE HIGH-T/SUB C/ SUPERCONDUCTOR
400 YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ ARE EXTRACTED FROM THE INFRARED SPECTRA
400 AT 300 K AND 17 K WHILE THE ABSORPTION FEATURE SEEN AROUND 3500
400 CM/SUP -1/ IS ATTRIBUTED TO THE QUASI TWO-DIMENSIONAL CHARACTER OF
400 THE CHARGE DENSITY PROFILE OF THE CARRIERS. THE FINER STRUCTURES SEEN
400 IN THE FAR AND MID-INFRARED REGIONS ARE RELATED TO SURFACE ABSORPTION
400 BANDS CHARACTERISTIC OF BACO/SUB 3/, CUO AND Y/SUB 2/BACUO/SUB 5/
400 RESIDUES ACCUMULATING ON THE SURFACE AS A RESULT OF CORROSION FROM
400 THE ATMOSPHERE WATER AND CARBON DIOXIDE.
500 BARIUM COMPOUNDS; CORROSION; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 INFRARED SPECTRA OF INORGANIC SOLIDS; LIGHT ABSORPTION; REFLECTIVITY;
500 YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; CORROSION EFFECTS; MID-INFRARED
510 REFLECTANCE; OPTICAL TRANSPORT PROPERTIES; INFRARED SPECTRA;
510 ABSORPTION FEATURE; QUASI TWO-DIMENSIONAL CHARACTER; CHARGE DENSITY
510 PROFILE; FINER STRUCTURES; SURFACE ABSORPTION BANDS; RESIDUES; 300 K;
510 17 K; YBA/SUB 2/CU/SUB 3/O/SUB 7-X/; BACO/SUB 3/; CUO; Y/SUB
510 2/BACUO/SUB 5/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; BACO3/SUR CO3/SUR
550 BA/SUR O3/SUR C/SUR O/SUR BACO3/SS CO3/SS BA/SS O3/SS C/SS O/SS;
550 CUO/SUR CU/SUR O/SUR CUO/BIN CU/BIN O/BIN; Y2BACUO5/SUR BA/SUR CU/SUR
550 O5/SUR Y2/SUR O/SUR Y/SUR Y2BACUO5/SS BA/SS CU/SS O5/SS Y2/SS O/SS
550 Y/SS.
560 TEMPERATURE 3.0 E+02 K; TEMPERATURE 1.7 E+01 K.
DOCUMENT= 1482
AUTH = WISE
DT = 02
KN = B40891307154
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3388312
002 B40891307154
010 JOURNAL PAPER; EXPERIMENTAL.
100 MAGNETO-ELECTRICAL MEASUREMENTS OF SUPERCONDUCTING BISRCACUO.
200 WISE, P.; DAWSON, A.LER.; DATARS, W.R.; GARRETT, J.D.
220 DEPT. OF PHYS., MCMASTER UNIV., HAMILTON, ONT., CANADA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.3, P.341-5, REF.11
350 ISSN 0038-1098, CODEN SSCOA4
400 MEASUREMENTS OF THE ELECTRICAL RESISTANCE, HALL EFFECT AND
400 MAGNETIZATION HAVE BEEN MADE IN FIELDS BETWEEN ZERO AND 1.5 T ON A
400 POLYCRYSTALLINE SAMPLE OF BISRCACUO. ABOVE 120 K THE RESISTANCE IS
400 LINEAR WITH TEMPERATURE AND HAS NO DEPENDENCE ON MAGNETIC FIELD. A
400 SUPERCONDUCTING TRANSITION IS OBSERVABLE AT 85 K AND SHOWS A
400 DEPRESSION OF APPROXIMATELY 1 K T/SUP -1/ IN APPLIED FIELDS. THE HALL
400 COEFFICIENT R/SUB H/ INCREASES AS THE TEMPERATURE IS INCREASED
400 THROUGH T/SUB C/. THERE IS A CORRESPONDING DECREASE IN THE HALL
400 MOBILITY TO A CONSTANT VALUE OF 3.5*10/SUP -8/ G/SUP -1/ ABOVE 120 K.
400 THE MEASUREMENTS ABOVE 120 K ARE CONSISTENT WITH A CONDUCTIVITY THAT
400 IS LIMITED BY A METALLIC-LIKE PHONON SCATTERING, WITH A CARRIER MEAN
400 FREE PATH WHICH IS MUCH SMALLER THAN THE AVERAGE CRYSTALLITE
400 DIMENSION.
500 BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CARRIER MEAN FREE PATH; CARRIER
500 MOBILITY; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE SEMICONDUCTORS AND
500 INSULATORS; HALL EFFECT; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 MAGNETISATION; STRONTIUM COMPOUNDS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; TEMPERATURE DEPENDENCE;
510 MAGNETO-ELECTRICAL PROPERTIES; ELECTRICAL RESISTANCE; HALL EFFECT;
510 MAGNETIZATION; POLYCRYSTALLINE SAMPLE; SUPERCONDUCTING TRANSITION;
510 HALL COEFFICIENT; HALL MOBILITY; CONDUCTIVITY; METALLIC-LIKE PHONON
510 SCATTERING; CARRIER MEAN FREE PATH; AVERAGE CRYSTALLITE DIMENSION;
510 120 K; 85 K; BISRCACUO.
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS.
560 TEMPERATURE 1.2 E+02 K; TEMPERATURE 8.5 E+01 K.
DOCUMENT= 1483
AUTH = ZAWADOWS
DT = 02
KN = B40891307155
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3388313
002 B40891307155
010 JOURNAL PAPER; THEORETICAL.
100 POSSIBLE ROLE OF NON-BONDING P PI OXYGEN ORBITALS BY ORBITAL KONDO
100 EFFECT IN HIGH-T/SUB C/ SUPERCONDUCTIVITY.
200 ZAWADOWSKI, A.
220 DEPT. OF PHYS., ILLINOIS UNIV, URBANA, IL, USA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.4, P.439-42, REF.14
350 ISSN 0038-1098, CODEN SSCOA4
400 THE POSSIBLE ROLE OF THE P PI OXYGEN ORBITALS IN HIGH TEMPERATURE
400 SUPERCONDUCTIVITY IS DISCUSSED BY CONSIDERING THOSE SCATTERING
400 PROCESSES BETWEEN CONDUCTION ELECTRONS IN WHICH ONE P PI ORBITAL
400 OCCURS IN THE INTERMEDIATE STATES. THE RESPONSIBLE COUPLING IS THE
400 OFF-DIAGONAL COULOMB COUPLING BETWEEN ATOMIC AND BOND CHARGES, WHICH
400 IS ENHANCED BY KONDO-TYPE CORRELATION EFFECTS OF ORBITAL ORIGIN.
400 CONSIDERING THE 1:2:3 COMPOUND THE ROLE OF THE BRIDGING OXYGENS
400 BETWEEN THE PLANES AND CHAINS IS DISCUSSED.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; KONDO EFFECT.
510 NONBONDING P PI O ORBITALS; HIGH TEMPERATURE SUPERCONDUCTIVITY;
510 ATOMIC CHARGES; ORBITAL KONDO EFFECT; HIGH-T/SUB C/
510 SUPERCONDUCTIVITY; SCATTERING PROCESSES; CONDUCTION ELECTRONS;
510 INTERMEDIATE STATES; OFF-DIAGONAL COULOMB COUPLING; BOND CHARGES;
510 PLANES; CHAINS.
DOCUMENT= 1484
AUTH = LEE
DT = 02
KN = B40891307156
LG = ENGL
SN = ISSN 0038-1098
YR = 89
000 3388314
002 B40891307156
010 JOURNAL PAPER; EXPERIMENTAL.
100 SYSTEMATIC EFFECTS IN THIN FILM TUNNEL JUNCTIONS OF YBA/SUB 2/CU/SUB
100 3/O/SUB 7- DELTA /.
200 LEE, M.; NAITO, M.; KAPITULNIK, A.; BEASLEY, M.R.
220 DEPT. OF APPL. PHYS., STANFORD UNIV., CA, USA
310 SOLID STATE COMMUN. (USA)
330 APRIL 1989. VOL.70, NO.4, P.449-52, REF.18
350 ISSN 0038-1098, CODEN SSCOA4
400 THE AUTHORS REPORT ON JUNCTION FABRICATION, MATERIALS PROBLEMS, AND A
400 MORE SYSTEMATIC STUDY OF TUNNELING CHARACTERISTICS FOR PB-I-YBCO THIN
400 FILM SANDWICH-TYPE JUNCTIONS. THEIR RESULTS SUGGEST THAT THEY HAVE
400 CONSTRUCTED PROXIMITY EFFECT JUNCTIONS AND HAVE OBSERVED
400 DIRECTIONALLY AVERAGED SUPERCONDUCTING AND NORMAL PROPERTIES OF AN
400 OXYGEN DEFICIENT PHASE OF YBCO. AMONG THE OBSERVED PROPERTIES ARE A
400 LINEAR NORMAL DENSITY OF STATES, A CUSP FEATURE AT ZERO BIAS, AND A
400 GAP OPENING AT 60 K. THE DATA ALSO SUGGEST THAT THE NORMAL STATE
400 PROPERTIES ARE TEMPERATURE AND FIELD INDEPENDENT BELOW T/SUB C/ BUT
400 ARE TEMPERATURE DEPENDENT ABOVE T/SUB C/.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING
500 THIN FILMS; SUPERCONDUCTIVE TUNNELLING; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; THIN FILM TUNNEL JUNCTIONS;
510 FABRICATION; MATERIALS PROBLEMS; TUNNELING CHARACTERISTICS;
510 SANDWICH-TYPE JUNCTIONS; PROXIMITY EFFECT JUNCTIONS; NORMAL
510 PROPERTIES; LINEAR NORMAL DENSITY OF STATES; YBA/SUB 2/CU/SUB 3/O/SUB
510 7- DELTA /; PB.
550 PB/INT PB/EL; YBA2CU3O/INT BA2/INT CU3/INT BA/INT CU/INT O/INT Y/INT
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1485
AUTH = ZHOU
DT = 02
KN = B40891307189
LG = ENGL
NF = MGU6253
SN = ISSN 0039-6028
YR = 89
000 3388347
002 B40891307189
010 JOURNAL PAPER; EXPERIMENTAL.
100 SURFACE ATOMIC IMAGING OF LA/SUB 2/O/SUB 3/ AND LA/SUB 2/CUO/SUB 4/.
200 ZHOU, W.; JEFFERSON, D.A. / LIANG, W.Y.
220 DEPT. OF PHYS. CHEM., CAMBRIDGE UNIV., UK
310 SURF. SCI. (NETHERLANDS)
330 MARCH 1989. VOL.209, NO.3, P.444-54, REF.20
350 ISSN 0039-6028, CODEN SUSCAS
400 SURFACE PROFILE IMAGES FROM LA/SUB 2/O/SUB 3/ AND LA/SUB 2/CUO/SUB 4/
400 HAVE BEEN OBTAINED USING HIGH RESOLUTION ELECTRON MICROSCOPY. A
400 SURFACE LAYER OF THE C-FORM OF LA/SUB 2/O/SUB 3/ ABOUT 1 NM IN
400 THICKNESS COATING THE BULK OF THE A-FORM LA/SUB 2/O/SUB 3/ AND THE
400 MOVEMENT OF ATOMIC COLUMNS WITHIN THIS COATING WERE OBSERVED; THESE
400 TWO STRUCTURAL FORMS BEING INTERGROWN WITH THE (001) PLANE OF THE
400 A-FORM PARALLEL TO THE (111) PLANE OF THE C-FORM. ON THE (113)
400 SURFACE OF A LA/SUB 2/CUO/SUB 4/ CRYSTAL, A SINGLE ATOMIC LAYER
400 HAVING A DIFFERENT STRUCTURAL ARRANGEMENT FROM THAT OF THE BULK
400 CRYSTAL WAS VISIBLE, AND A DISPLACEMENT OF SOME OF THE LA CATIONS ON
400 THE SURFACE WAS PROVEN BY IMAGE SIMULATION. ON THE (001) SURFACE
400 PLANE OF LA/SUB 2/CUO/SUB 4/, THE MOVEMENT OF ATOMIC COLUMNS IN A
400 SURFACE RE-ARRANGEMENT WAS ALSO OBSERVED.
500 ELECTRON MICROSCOPE EXAMINATION OF MATERIALS; LANTHANUM COMPOUNDS;
500 SURFACE STRUCTURE.
510 SURFACE PROFILE IMAGES; HIGH RESOLUTION ELECTRON MICROSCOPY; LA/SUB
510 2/O/SUB 3/; LA/SUB 2/CUO/SUB 4/.
550 LA2O3/SUR LA2/SUR LA/SUR O3/SUR O/SUR LA2O3/BIN LA2/BIN LA/BIN O3/BIN
550 O/BIN; LA2CUO4/SUR LA2/SUR CU/SUR LA/SUR O4/SUR O/SUR LA2CUO4/SS
550 LA2/SS CU/SS LA/SS O4/SS O/SS.
DOCUMENT= 1486
AUTH = ZANADVOR
DT = 02
KN = B40891307314
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3388472
002 B40891307314
010 JOURNAL PAPER; EXPERIMENTAL.
100 KINETICS OF A TRANSIENT PHOTORESPONSE OF PURE AND DOPED (WITH CU AND
100 NI IONS) LITHIUM NIOBATE CRYSTALS.
200 ZANADVOROV, P.N.; LEBEDEVA, E.L.; MOLDAVSKAYA, V.M.; KOKANYAN, E.P.
220 A.A. ZHDANOV STATE UNIV., LENINGRAD, USSR
310 FIZ. TVERD. TELA (USSR)
330 JULY 1988. VOL.30, NO.7, P.2015-19, REF.14
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). JULY 1988. VOL.30,
331 NO.7, P.1162-4. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 AN INVESTIGATION WAS MADE OF THE KINETICS OF THE TRANSIENT
400 PHOTORESPONSE OF LITHIUM NIOBATE CRYSTALS WHICH WERE EITHER NOMINALLY
400 PURE OR WERE DOPED WITH TRANSITION ELEMENTS CU AND NI. THESE CRYSTALS
400 WERE SUBJECTED TO HIGH-INTENSITY EXCITATION PULSES OF WAVELENGTHS
400 1.06, 0.53, AND 0.35 MU M. TWO CONTRIBUTIONS TO THE NONLINEAR STATIC
400 POLARIZATION (INSTANTANEOUS AND RELAXATION) WERE SEPARATED.
500 COPPER; DIELECTRIC POLARISATION; LITHIUM COMPOUNDS; NICKEL;
500 PHOTOCONDUCTIVITY; TRANSIENTS.
510 TRANSIENT PHOTORESPONSE KINETICS; RELAXATION POLARISATION;
510 INSTANTANEOUS POLARISATION; NIOBATE CRYSTALS; HIGH-INTENSITY
510 EXCITATION PULSES; NONLINEAR STATIC POLARIZATION; LINBO/SUB 3/;
510 LINBO/SUB 3/:CU,NI.
550 LINBO3/SS NBO3/SS LI/SS NB/SS O3/SS O/SS; LINBO3:CU,NI/SS LINBO3/SS
550 NBO3/SS CU/SS LI/SS NB/SS NI/SS O3/SS O/SS CU/EL NI/EL CU/DOP NI/DOP.
DOCUMENT= 1487
AUTH = DZUGUTOV
DT = 02
KN = B40891307333
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3388491
002 B40891307333
010 JOURNAL PAPER; EXPERIMENTAL.
100 SPATIAL DISTRIBUTION OF THE MAGNETIC INDUCTION IN A SUPERCONDUCTING
100 CERAMIC.
200 DZUGUTOV, V.M.; FISHER, L.M.
220 V.I. LENIN ALL-UNION ELECTR. ENG. INST., MOSCOW, USSR
310 FIZ. TVERD. TELA (USSR)
330 JULY 1988. VOL.30, NO.7, P.2148-51, REF.4
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). JULY 1988. VOL.30,
331 NO.7, P.1238-9. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 A HALL PROBE WAS USED TO INVESTIGATED THE PENETRATION OF A MAGNETIC
400 FIELD INTO SUPERCONDUCTING Y-BA-CU-O CERAMIC SAMPLES. THE
400 EXPERIMENTAL RESULTS ENABLED AN ESTIMATE OF THE CRITICAL CURRENT
400 DENSITY OVER THE CROSS SECTION OF THE SUPERCONDUCTOR. THE CURRENT
400 DENSITY ON THE SURFACE OF A SAMPLE WAS AT LEAST AN ORDER OF MAGNITUDE
400 HIGHER THAN THE BULK DENSITY AND THE LATTER WAS ESTIMATED TO BE
400 10/SUP 2/ A/CM/SUP 2/.
500 BARIUM COMPOUNDS; CRITICAL CURRENT DENSITY (SUPERCONDUCTIVITY);
500 HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETISATION; YTTRIUM COMPOUNDS.
510 HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC INDUCTION; HALL PROBE;
510 CRITICAL CURRENT DENSITY; YBACUO.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1488
AUTH = BALYKINA
DT = 02
KN = B40891307348
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3388506
002 B40891307348
010 JOURNAL PAPER; EXPERIMENTAL.
100 INFLUENCE OF BI IONS ON MAGNETOOPTIC PROPERTIES OF ACU/SUB 3/MN/SUB
100 4/O/SUB 12/ PEROVSKITES.
200 BALYKINA, E.A.; GAN'SHINA, E.A.; KRINCHIK, G.S.; TROYANCHUK, I.O.
220 M.V. LOMONOSOV STATE UNIV., MOSCOW, USSR
310 FIZ. TVERD. TELA (USSR)
330 JULY 1988. VOL.30, NO.7, P.2215-16, REF.4
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). JULY 1988. VOL.30,
331 NO.7, P.1277. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 THE AUTHORS REPORT THE RESULTS OF AN INVESTIGATION OF MAGNETOOPTIC
400 PROPERTIES OF ACU/SUB 3/MN/SUB 4/O/SUB 12/ PEROVSKITES
400 (A=GD,HO,Y,BI). INTRODUCTION OF BI INCREASES CONSIDERABLY THE
400 MAGNETOOPTIC PROPERTIES AND ALSO THE KERR EFFECT. THE LATTER COULD BE
400 DUE TO THE ENHANCEMENT OF TRANSITIONS INVOLVING CHARGE TRANSFER FROM
400 THE MANGANESE IONS TO THE OXYGEN IONS.
500 BISMUTH COMPOUNDS; KERR MAGNETO-OPTICAL EFFECT; MAGNETISATION
500 REVERSAL.
510 MAGNETISATION REVERSAL; MAGNETOOPTIC PROPERTIES; KERR EFFECT; CHARGE
510 TRANSFER; BICU/SUB 3/MN/SUB 4/O/SUB 12/; GDCU/SUB 3/MN/SUB 4/O/SUB
510 12/; HOCU/SUB 3/MN/SUB 4/O/SUB 12/; YCU/SUB 3/MN/SUB 4/O/SUB 12/.
550 BICU3MN4O12/SS CU3/SS MN4/SS O12/SS BI/SS CU/SS MN/SS O/SS;
550 GDCU3MN4O12/SS CU3/SS MN4/SS O12/SS CU/SS GD/SS MN/SS O/SS;
550 HOCU3MN4O12/SS CU3/SS MN4/SS O12/SS CU/SS HO/SS MN/SS O/SS;
550 YCU3MN4O12/SS CU3/SS MN4/SS O12/SS CU/SS MN/SS O/SS Y/SS.
DOCUMENT= 1489
AUTH = KHASANOV
DT = 02
KN = B40891307360
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3388518
002 B40891307360
010 JOURNAL PAPER; EXPERIMENTAL.
100 DISTRIBUTION OF OXYGEN ATOMS IN A SUPERCONDUCTING CERAMIC.
200 KHASANOV, A.M.; TSAREVSKII, S.S.; LIBERMAN, A.B.
220 V.I. UL'YANOV-LENIN STATE UNIV., KAZAN, USSR
310 FIZ. TVERD. TELA (USSR)
330 SEPT. 1988. VOL.30, NO.9, P.2688-91, REF.7
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). SEPT. 1988.
331 VOL.30, NO.9, P.1548-50. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 A MOSSBAUER INVESTIGATION WAS MADE OF A SUPERCONDUCTING CERAMIC
400 YBA/SUB 2/CU/SUB 2.97/ /SUP 57/FE/SUB 0.03/O/SUB X/ WITH A CRITICAL
400 TRANSITION TEMPERATURE OF 92 K. MEASUREMENTS WERE MADE ON SAMPLES OF
400 THREE TYPES: SYNTHESIZED BY A CONVENTIONAL TECHNOLOGY, QUENCHED FROM
400 800 DEGREES C IN AIR, AND ANNEALED IN OXYGEN AT 800 DEGREES C. THIS
400 MADE IT POSSIBLE TO IDENTIFY FIVE POTENTIAL POSITIONS OF THE FE/SUP
400 3+/ IONS REPLACING THE IONS OF COPPER AT TWO POSITIONS CU1 AND CU2.
400 THE QUADRUPOLE SPLITTINGS, THE LINE SHIFTS, AND THE RELATIVE
400 INTENSITIES OF THE COMPONENTS OF THE SPECTRA CORRESPONDING TO THE
400 IRON IONS LOCALIZED AT THE CU1 POSITIONS WERE DESCRIBED WELL BY
400 POSTULATING THE PRESENCE OF OXYGEN-DEFECT POSITIONS IN THE STRUCTURE
400 OF CERAMICS FOR X<7. POSSIBLE TYPES OF OXYGEN-ION ORDERING IN THE
400 STRUCTURE WERE EXAMINED.
500 ANNEALING; BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC
500 COMPOUNDS; CRYSTAL DEFECTS; HIGH-TEMPERATURE SUPERCONDUCTORS; ISOMER
500 SHIFT; MOSSBAUER EFFECT; QUENCHING (THERMAL); YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ANNEALING; O-ION ORDERING; O-DEFECT
510 POSITIONS; QUENCHING; /SUP 57/FE MOSSBAUER STUDY; FE/SUP 3+/
510 POSITIONS; O ATOMIC POSITIONS; CRYSTAL STRUCTURE; QUADRUPOLE
510 SPLITTINGS; LINE SHIFTS; 92 K; 800 DEGC; YBA/SUB 2/CU/SUB 2.97/FE/SUB
510 0.03/O/SUB X/.
550 YBA2CU2.97FE0.03O/SS CU2.97/SS FE0.03/SS BA2/SS BA/SS CU/SS FE/SS
550 O/SS Y/SS.
560 TEMPERATURE 9.2 E+01 K; TEMPERATURE 1.07 E+03 K.
DOCUMENT= 1490
AUTH = SKOLIS
DT = 02
KN = B40891307361
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3388519
002 B40891307361
010 JOURNAL PAPER; EXPERIMENTAL.
100 INFLUENCE OF THE EQUILIBRIUM PHASE COMPOSITION ON THE
100 SUPERCONDUCTIVITY OF Y/SUB 2/O/SUB 3/-BAO-CUO SAMPLES.
200 SKOLIS, YU.YA.; CHESNOKOV, G.A.; PAHIN, S.F.; KITSENKO, S.V.; KOVBA,
200 M.L.; MOSHCHALKOV, V.V.; MUTTIK, I.G.; SAMARIN, N.A.
220 M.V. LOMONOSOV STATE UNIV., MOSCOW, USSR
310 FIZ. TVERD. TELA (USSR)
330 SEPT. 1988. VOL.30, NO.9, P.2800-4, REF.10
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). SEPT. 1988.
331 VOL.30, NO.9, P.1613-15. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 THE METHOD OF X-RAY PHASE ANALYSIS OF QUENCHED SAMPLES WAS USED IN A
400 STUDY OF THE EQUILIBRIUM ISOTHERMAL (900 DEGREES C) SECTION OF THE
400 PHASE DIAGRAM OF THE Y/SUB 2/O/SUB 3/-BAO-CUO SYSTEM IN ROOM
400 ATMOSPHERE AND IN PURE OXYGEN. TWO QUASIBINARY (BACUO/SUB 2/ AND
400 Y/SUB 2/CU/SUB 2/O/SUB 5/) AND TWO QUASITERNARY (Y/SUB 2/BACUO/SUB 5/
400 AND YBA/SUB 2/CU/SUB 3/O/SUB 6.5+ DELTA /) COMPOUNDS WERE FOUND IN
400 THE INVESTIGATED RANGE OF COMPOSITIONS. ONLY THE LAST OF THESE FOUR
400 COMPOUNDS WAS A HIGH-TEMPERATURE SUPERCONDUCTOR. THE SYSTEM DID NOT
400 EXHIBIT WIDE SOLID-SOLUTION REGIONS WITH RESPECT TO THE CATIONS. THE
400 CRITICAL (SUPERCONDUCTING TRANSITION) TEMPERATURE T/SUB C/ WAS
400 SIMILAR FOR A SAMPLE CONSISTING OF A SINGLE PHASE AND FOR THREE
400 TWO-PHASE AND THREE THREE-PHASE EQUILIBRIUM SAMPLES. THIS TEMPERATURE
400 WAS WITHIN THE RANGE FROM 89 TO 95 K. THERE WAS TENDENCY FOR THE
400 VALUE OF T/SUB C/ TO INCREASE IN THE CASE OF MULTIPHASE SAMPLES WITH
400 LOWER CONCENTRATIONS OF BARIUM OXIDE.
500 BARIUM COMPOUNDS; COPPER COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 PHASE EQUILIBRIUM; SOLID SOLUTIONS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; X-RAY DIFFRACTION EXAMINATION OF MATERIALS; YTTRIUM
500 COMPOUNDS.
510 PHASE EQUILIBRIA; EQUILIBRIUM ISOTHERMAL SECTION; O ATMOSPHERE;
510 CRITICAL TEMPERATURE; EQUILIBRIUM PHASE COMPOSITION; X-RAY PHASE
510 ANALYSIS; PHASE DIAGRAM; HIGH-TEMPERATURE SUPERCONDUCTOR;
510 SOLID-SOLUTION REGIONS; MULTIPHASE SAMPLES; 89 TO 95 K; Y/SUB 2/O/SUB
510 3/-BAO-CUO; BACUO/SUB 2/; Y/SUB 2/CU/SUB 2/O/SUB 5/; Y/SUB
510 2/BACUO/SUB 5/; YBA/SUB 2/CU/SUB 3/O/SUB 6.5+ DELTA /.
550 Y2O3BAOCUO/SS BA/SS CU/SS O3/SS Y2/SS O/SS Y/SS; BACUO2/SS BA/SS
550 CU/SS O2/SS O/SS; Y2CU2O5/SS CU2/SS CU/SS O5/SS Y2/SS O/SS Y/SS;
550 Y2BACUO5/SS BA/SS CU/SS O5/SS Y2/SS O/SS Y/SS; YBA2CU3O/SS BA2/SS
550 CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 8.9 E+01 TO 9.5 E+01 K.
DOCUMENT= 1491
AUTH = KHASANOV
DT = 02
KN = B40891307362
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3388520
002 B40891307362
010 JOURNAL PAPER; EXPERIMENTAL.
100 MOSSBAUER INVESTIGATIONS OF A SUPERCONDUCTING (Y, EU)BA/SUB 2/CU/SUB
100 3/O/SUB X/ SYSTEM.
200 KHASANOV, A.M.; TSAREVSKII, S.S.; LIBERMAN, A.B.
220 V.I. UL'YANOV-LENIN STATE UNIV., KAZAN, USSR
310 FIZ. TVERD. TELA (USSR)
330 SEPT. 1988. VOL.30, NO.9, P.2836-8, REF.3
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). SEPT. 1988.
331 VOL.30, NO.9, P.1635-6. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 THE MOSSBAUER SPECTRA WERE DETERMINED FOR EUBA/SUB 2/CU/SUB 3/O/SUB
400 7- DELTA /, YBA/SUB 2/CU/SUB 2.97/FE/SUB 0.03/O/SUB 7- DELTA /, AND
400 YBA/SUB 2/CU/SUB 2.95/SN/SUB 0.05/O/SUB 7- DELTA / IN THE TEMPERATURE
400 RANGE 80-300 K USING THE /SUP 57/FE, /SUP 119/SN, AND /SUP 151/EU
400 ISOTOPES. COOLING FROM 300 TO 80 K DID NOT ALTER THE SPECTRA
400 SIGNIFICANTLY, SO THE AUTHORS OBTAINED ADDITIONAL INFORMATION BY
400 INVESTIGATING SAMPLES AT DIFFERENT STAGES OF THE SINTERING PROCESS,
400 AS WELL AS SAMPLES QUENCHED IN AIR FROM 800 DEGREES C.
500 BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 EUROPIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; MOSSBAUER
500 EFFECT; QUENCHING (THERMAL); YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; QUENCHING; CRYSTAL STRUCTURE;
510 COOLING; MOSSBAUER SPECTRA; SINTERING; 80 TO 300 K; EUBA/SUB 2/CU/SUB
510 3/O/SUB 7- DELTA /; YBA/SUB 2/CU/SUB 2.97/FE/SUB 0.03/O/SUB 7- DELTA
510 /; YBA/SUB 2/CU/SUB 2.95/SN/SUB 0.05/O/SUB 7- DELTA /.
550 EUBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS EU/SS O/SS;
550 YBA2CU2.97FE0.03O/SS CU2.97/SS FE0.03/SS BA2/SS BA/SS CU/SS FE/SS
550 O/SS Y/SS; YBA2CU2.95SN0.05O/SS CU2.95/SS SN0.05/SS BA2/SS BA/SS
550 CU/SS SN/SS O/SS Y/SS.
560 TEMPERATURE 8.0 E+01 TO 3.0 E+02 K.
DOCUMENT= 1492
AUTH = ANDRIANO
DT = 02
KN = B40891307363
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3388521
002 B40891307363
010 JOURNAL PAPER; EXPERIMENTAL.
100 MOSSBAUER EFFECT AT /SUP 151/EU NUCLEI IN SUPERCONDUCTING CERAMIC
100 EUBA/SUB 2/CU/SUB 3/O/SUB 7/.
200 ANDRIANOV, V.A.; ANISIMOVA, O.L.; KOZIN, M.G.; PENTIN, A.YU.; MITSEN,
200 K.V.; IVANENKO, O.M.
220 SCI.-RES. INST. OF NUCL. PHYS., M.V. LOMONOSOV STATE UNIV., MOSCOW,
220 USSR
310 FIZ. TVERD. TELA (USSR)
330 SEPT. 1988. VOL.30, NO.9, P.2859-61, REF.6
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). SEPT. 1988.
331 VOL.30, NO.9, P.1650-1. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 AN INVESTIGATION WAS MADE OF A HIGH-TEMPERATURE SUPERCONDUCTING
400 CERAMIC EUBA/SUB 2/CU/SUB 3/O/SUB 7/ USING THE MOSSBAUER EFFECT IN
400 /SUP 151/EU NUCLEI. THIS CERAMIC WAS PREPARED BY THE POWDER
400 METALLURGY METHOD. THE SUPERCONDUCTING TRANSITION TEMPERATURE DEDUCED
400 FROM THE TEMPERATURE DEPENDENCE OF THE RESISTANCE WAS 93 K AND THE
400 WIDTH OF THE TRANSITION WAS APPROXIMATELY 1 K. THE MOSSBAUER ABSORBER
400 THICKNESS, MEASURED IN TERMS OF THE /SUP 151/EU ISOTOPE, WAS 3.3
400 MG/CM/SUP 2/. THE MOSSBAUER SOURCE WAS SM/SUB 2/O/SUB 3/ ACTIVATED
400 WITH THE /SUP 151/SM ISOTOPE WHICH DECAYED TO FORM /SUP 151/EU IN THE
400 METASTABLE STATE I=7/2/SUP +/. RESONANT GAMMA RADIATION OF 21.6 KEV
400 ENERGY WAS DETECTED USING AN NAI:TL SCINTILLATOR WHICH WAS 1 MM
400 THICK. THE MOSSBAUER MEASUREMENTS WERE MADE IN THE TEMPERATURE RANGE
400 10-300 K. THE SAMPLE WAS COOLED IN A CONTINUOUS-FLOW HELIUM CRYOSTAT.
500 BARIUM COMPOUNDS; EUROPIUM COMPOUNDS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; MOSSBAUER EFFECT.
510 HIGH TEMPERATURE SUPERCONDUCTOR; MOSSBAUER EFFECT; POWDER METALLURGY;
510 MOSSBAUER ABSORBER THICKNESS; 10 TO 300 K; 93 K; EUBA/SUB 2/CU/SUB
510 3/O/SUB 7/.
550 EUBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS EU/SS O7/SS O/SS.
560 TEMPERATURE 1.0 E+01 TO 3.0 E+02 K; TEMPERATURE 9.3 E+01 K.
DOCUMENT= 1493
AUTH = VEDENEEV
DT = 02
KN = B40891307364
LG = ENGL
SN = ISSN 0367-3294
YR = 88
000 3388522
002 B40891307364
010 JOURNAL PAPER; EXPERIMENTAL.
100 TUNNEL INVESTIGATIONS OF LA/SUB 2-X/SR/SUB X/CUO/SUB 4-Y/ SINGLE
100 CRYSTALS WITH T/SUB C/=12-13 K.
200 VEDENEEV, S.I.; KAZAKOV, I.P.; KIR'YANOV, A.P.; MAKSIMOVSKII, S.N.;
200 STEPANOV, V.A.
220 P.N. LEBEDEV PHYSICS INST., ACAD. OF SCI., MOSCOW, USSR
310 FIZ. TVERD. TELA (USSR)
330 SEPT. 1988. VOL.30, NO.9, P.2861-3, REF.5
331 ENGLISH TRANSLATION: SOV. PHYS.-SOLID STATE (USA). SEPT. 1988.
331 VOL.30, NO.9, P.1652-3. CODEN SPSSA7. ISSN 0038-5654
350 ISSN 0367-3294, CODEN FTVTAC
400 THE AUTHORS REPORT THE RESULTS OF AN INVESTIGATION OF THE
400 LOW-TEMPERATURE PHASE OF LA/SUB 2-X/SR/SUB X/CU/SUB 4-Y/ SINGLE
400 CRYSTALS WITH T/SUB C/=12-13 K. THEY INVESTIGATED THE TEMPERATURE
400 DEPENDENCES OF THE CURRENT-VOLTAGE CHARACTERISTICS OF 'POINT' TUNNEL
400 JUNCTIONS OF THE LA/SUB 2-X/SR/SUB X/CUO/SUB 4-Y/-NB TYPE. SINGLE
400 CRYSTALS OF LA/SUB 2-X/SR/SUB X/CUO/SUB 4-Y/ WERE PLATELETS OF LENGTH
400 AND WIDTH 0.5-1 MM AND 30-100 MU M THICK. A NIOBIUM POINT WAS PRESSED
400 IN LIQUID HELIUM AGAINST THE EDGE OF A CRYSTAL OR ONE OF ITS FACES
400 (ALONG THE C AXIS). THE SUPERCONDUCTING TRANSITION TEMPERATURE T/SUB
400 C/ WAS ASSUMED TO BE THAT TEMPERATURE AT WHICH THE ENERGY GAP DELTA
400 DISAPPEARED. THE AUTHORS FOUND NO ANISOTROPY IN THE VALUE OF DELTA .
400 BY COMPARING -D SQUARE ROOT /DI AND -D/SUP 2/ SQUARE ROOT /DI/SUP 2/
400 CURVES WITH THE PHONON SPECTRUM THEY CONCLUDED THAT THERE WAS A
400 DEFINITE CONTRIBUTION OF THE ELECTRON-PHONON INTERACTION TO THE
400 SUPERCONDUCTIVITY. AN ANOMALOUSLY LARGE VALUE OF DELTA SUGGESTED THE
400 ABSENCE OF A SIMPLE RELATIONSHIP BETWEEN DELTA AND T/SUB C/.
500 ELECTRON-PHONON INTERACTIONS; LANTHANUM COMPOUNDS; NIOBIUM; POINT
500 CONTACTS; STRONTIUM COMPOUNDS; SUPERCONDUCTING ENERGY GAP;
500 SUPERCONDUCTIVE TUNNELLING; TYPE II SUPERCONDUCTORS.
510 POINT TUNNEL JUNCTIONS; TUNNELLING; TEMPERATURE DEPENDENCE; CRITICAL
510 TEMPERATURE; SUPERCONDUCTOR; CURRENT-VOLTAGE CHARACTERISTICS; ENERGY
510 GAP; ANISOTROPY; PHONON SPECTRUM; ELECTRON-PHONON INTERACTION; 13 K;
510 LA/SUB 2-X/SR/SUB X/CUO/SUB 4-Y/-NB.
550 LASRCUO-NB/INT LASRCUO/INT CU/INT LA/INT NB/INT SR/INT O/INT
550 LASRCUO/SS CU/SS LA/SS SR/SS O/SS NB/EL.
560 TEMPERATURE 1.3 E+01 K.
DOCUMENT= 1494
AUTH = KHLYUSTI
DT = 02
KN = B40891307429
LG = ENGL
SN = ISSN 0042-1294
YR = 88
000 3388587
002 B40891307429
010 JOURNAL PAPER; BIBLIOGRAPHY, THEORETICAL, EXPERIMENTAL.
100 LOCALIZED SUPERCONDUCTIVITY OF TWIN METAL CRYSTALS.
200 KHLYUSTIKOV, I.N.; BUZDIN, A.I.
220 INST. OF PROBLEMS IN MICROELECTRON. ? ULTRAPURE MATER. ACAD. OF SCI.,
220 CHERNOGOLOVKA, USSR
310 USP. FIZ. NAUK (USSR)
330 MAY 1988. VOL.155, NO.1, P.47-88, REF.92
331 ENGLISH TRANSLATION: SOV. PHYS.-USP. (USA). MAY 1988. VOL.31, NO.5,
331 P.409-33. CODEN SOPUAP. ISSN 0038-5670
350 ISSN 0042-1294, CODEN UFNAAG
400 THE NEW PHENOMENON OF TWINNING-PLANE SUPERCONDUCTIVITY IS REVIEWED.
400 IT HAS ALREADY BEEN OBSERVED IN SEVERAL METALS. THE SUPERCONDUCTIVITY
400 IS LOCALIZED NEAR A TWINNING PLANE AND IT APPEARS AT A TEMPERATURE
400 HIGHER THAN THE CRITICAL TEMPERATURE OF THE SUPERCONDUCTING
400 TRANSITION OF A BULK METAL. THE PHASE DIAGRAM FOR TWINNING-PLANE
400 SUPERCONDUCTIVITY, PLOTTED USING THE MAGNETIC FIELD AND TEMPERATURE
400 AS THE COORDINATES, IS VERY DIFFERENT FOR TYPE I AND TYPE II
400 SUPERCONDUCTORS. A DETAILED ANALYSIS OF THE EXPERIMENTAL DATA ON
400 TWINNING-PLANE SUPERCONDUCTIVITY IS ACCOMPANIED BY A THEORETICAL
400 DESCRIPTION OF THE PHENOMENON. THE PRESENCE OF A DENSE TWINNED
400 STRUCTURE MAY INCREASE CONSIDERABLY THE CRITICAL TEMPERATURE: FOR
400 EXAMPLE, IN THE CASE OF TIN IT HAS BEEN POSSIBLE TO INCREASE THIS
400 TEMPERATURE MORE THAN THREEFOLD. THE AUTHORS DISCUSS ALSO THE DATA
400 SHOWING THAT TWINNING-PLANE SUPERCONDUCTIVITY CAN PLAY AN IMPORTANT
400 ROLE IN THE RECENTLY DISCOVERED HIGH-TEMPERATURE SUPERCONDUCTORS.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; REVIEWS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; TWINNING; TYPE I SUPERCONDUCTORS; TYPE II
500 SUPERCONDUCTORS.
510 TYPE I SUPERCONDUCTORS; TWIN METAL CRYSTALS; TWINNING-PLANE
510 SUPERCONDUCTIVITY; PHASE DIAGRAM; TYPE II SUPERCONDUCTORS; DENSE
510 TWINNED STRUCTURE; CRITICAL TEMPERATURE; HIGH-TEMPERATURE
510 SUPERCONDUCTORS; SN.
550 SN/EL.
DOCUMENT= 1495
AUTH = OGATA
DT = 02
KN = B40891307500
LG = JAPA
SN = ISSN 0454-4544
YR = 89
000 3388658
002 B40891307500
010 JOURNAL PAPER; THEORETICAL.
100 NUMERICAL STUDIES OF GROUND STATES OF MODELS FOR HIGH-TEMPERATURE
100 SUPERCONDUCTORS.
200 OGATA, M.
310 SOLID STATE PHYS. (JAPAN)
330 MARCH 1989. VOL.24, NO.3, P.164-9, REF.22. (IN JAPANESE)
350 ISSN 0454-4544, CODEN KOTBA2
400 THE STRONGLY CORRELATED TWO-DIMENSIONAL CUO/SUB 2/ MODELS ARE STUDIED
400 TO IDENTIFY PAIRING MECHANISMS FOR HIGH-T/SUB C/ SUPERCONDUCTIVITY.
400 DETAILED STUDIES OF THE GROUND STATES REVEAL ATTRACTIVE INTERACTION
400 BETWEEN TWO HOLES DOPED ON OXYGEN ORBITALS (P SIGMA OR P PI ) FOR
400 SOME SITUATIONS.
500 COOPER PAIRS; HIGH-TEMPERATURE SUPERCONDUCTORS.
510 O HOLE ORBITALS; GROUND STATES; HIGH-TEMPERATURE SUPERCONDUCTORS;
510 STRONGLY CORRELATED TWO-DIMENSIONAL CUO/SUB 2/ MODELS; PAIRING
510 MECHANISMS; HIGH-T/SUB C/ SUPERCONDUCTIVITY; ATTRACTIVE INTERACTION.
DOCUMENT= 1496
AUTH = KANG
DT = 06
KN = B40891307717
LG = ENGL
SN = ISSN 0379-6779
YR = 88
000 3388875
002 B40891307717
010 CONFERENCE PAPER; EXPERIMENTAL.
100 STUDY OF THE HIGH TEMPERATURE PHASE DIAGRAM OF BETA -(BEDT-TTF)/SUB
100 2/I/SUB 3/.
200 KANG, W.; JEROME, D.; LENOIR, C.; BATAIL, P.
220 LAB. DE PHYS. DES SOLIDES, UNIV. DE PARIS-SUD, ORSAY, FRANCE
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 15 DEC. 1988. VOL.27, NO.1-2, P.353-9, REF.13
350 ISSN 0379-6779, CODEN SYMEDZ
400 THE PRESSURE-TEMPERATURE PHASE DIAGRAM OF THE ORGANIC SUPERCONDUCTOR
400 BETA -(BEDT-TTF)/SUB 2/I/SUB 3/ WHICH PLAYS AN IMPORTANT ROLE ON THE
400 LOW TEMPERATURE CHARACTERISTICS OF THIS COMPOUND IS INVESTIGATED BY
400 DIFFERENTIAL THERMAL ANALYSIS AND THE LOW FREQUENCY AC CONDUCTIVITY
400 MEASUREMENT. THE RELATIVELY GOOD AGREEMENT BETWEEN THE RESULTS FROM
400 THE DIFFERENT METHODS JUSTIFIES THE PHASE DIAGRAM. THE RESULTS
400 CONTRAST WITH THE CALCULATED PHASE DIAGRAM FOR THE ABSOLUTE STABILITY
400 OF THE BETA -L AND BETA -H PHASES IN THE LOW TEMPERATURE REGION. ALSO
400 THE AUTHORS SHOW THAT THERE CAN BE AN ADDITIONAL IRREVERSIBLE PHASE
400 TRANSITION WHEN COOLING THE VIRGIN SAMPLE UNDER PRESSURE.
500 ELECTRICAL CONDUCTIVITY OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS;
500 ORGANIC SUPERCONDUCTORS; PHASE DIAGRAMS; SOLID-STATE PHASE
500 TRANSFORMATIONS; THERMAL ANALYSIS.
510 BETA -(BEDT-TTF)/SUB 2/I/SUB 3/; PRESSURE-TEMPERATURE PHASE DIAGRAM;
510 ORGANIC SUPERCONDUCTOR; DIFFERENTIAL THERMAL ANALYSIS; LOW FREQUENCY
510 AC CONDUCTIVITY; IRREVERSIBLE PHASE TRANSITION.
DOCUMENT= 1497
AUTH = KHAIRULL
DT = 06
KN = B40891307762
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388920
002 B40891307762
010 CONFERENCE PAPER; EXPERIMENTAL.
100 LOW TEMPERATURE MICROWAVE RESPONSE OF YBACUO SUPERCONDUCTORS: NARROW
100 RESONANCE-LIKE PEAK IN ESR.
200 KHAIRULLIN, I.I.; ZAKHIDOV, A.A.; KHABIBULLAEV, P.K. / GRIGORIAN,
200 L.S.
220 INST. FOR NUCL. PHYS., ACAD. OF SCI., TASHKENT, UZBEK SSR, USSR
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 21 MARCH 1989. VOL.29, NO.2-3, P.F541-6, REF.11
350 ISSN 0379-6779, CODEN SYMEDZ
400 NEW FEATURES OF THE LOW-FIELD SIGNAL (LFS) IN YBACUO SUPERCONDUCTING
400 CERAMICS (SC) AND THEIR COMPOSITES WITH POLYACETYLENE ARE STUDIED IN
400 ESR. THE NARROW RESONANCE-LIKE COMPONENT (RC) OF LFS IS REVEALED AT
400 NEAR-ZERO FIELD H APPROXIMATELY 0.5 G. RC IS FOUND TO BE PRONOUNCED
400 AT LOW T 10 K, SENSITIVE TO MAGNETIC FIELD (DESTROYED AT H>H/SUB
400 B/(T)), TO MODULATION AMPLITUDE (H/SUB MOD/) AND MICROWAVE POWER
400 LEVEL P. DECREASE OF RC AND BACKGROUND (BG) LFS INTENSITY IS OBSERVED
400 AT EVACUATION OF THE SAMPLE, REVERSIBLY INCREASING IN THE ATMOSPHERE
400 OF GASEOUS OXIDANTS: AMBIENT O/SUB 2/ OR J/SUB 2/-VAPOUR. RC
400 DEMONSTRATES NEGLIGIBLE HYSTERESIS UPON MAGNETIC CYCLING CONTRARY TO
400 SIGNIFICANT HYSTERESIS WITHIN BG IMPLYING THUS THE DISTINCT ORIGIN OR
400 TWO LFS COMPONENTS.
500 BARIUM COMPOUNDS; CERAMICS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 MAGNETIC HYSTERESIS; PARAMAGNETIC RESONANCE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; ELECTRON SPIN RESONANCE; LOW
510 TEMPERATURE MICROWAVE RESPONSE; YBACUO-POLYACETYLENE COMPOSITES;
510 NARROW RESONANCE-LIKE PEAK; ESR; LOW-FIELD SIGNAL; SUPERCONDUCTING
510 CERAMICS; NEAR-ZERO FIELD; MAGNETIC FIELD; MODULATION AMPLITUDE;
510 MICROWAVE POWER LEVEL; HYSTERESIS; MAGNETIC CYCLING; 10 K; YBACUO.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 1.0 E+01 K.
DOCUMENT= 1498
AUTH = KANODA
DT = 06
KN = B40891307763
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388921
002 B40891307763
010 CONFERENCE PAPER; EXPERIMENTAL.
100 OXYGEN-DEFICIENCY DEPENDENT MAGNETISM OF YBA/SUB 2/CU/SUB 3/O/SUB
100 7-X/: EPR AND STATIC SUSCEPTIBILITY.
200 KANODA, K.; TAKAHASHI, T.; KAWAGOE, T.; MIZOGUCHI, T. / HASUMI, M.;
200 KAGOSHIMA, S.
220 DEPT. OF PHYS., GAKUSHUIN UNIV., TOKYO, JAPAN
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 21 MARCH 1989. VOL.29, NO.2-3, P.F547-52, REF.15
350 ISSN 0379-6779, CODEN SYMEDZ
400 MAGNETISM OF YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ WITH VARIOUS OXYGEN
400 DEFICIENCY HAS BEEN INVESTIGATED BY STATIC SUSCEPTIBILITY AND
400 ELECTRON PARAMAGNETIC RESONANCE (EPR) MEASUREMENTS. THE
400 SUSCEPTIBILITY OF THE SAMPLES IN THE ORTHORHOMBIC PHASE (0T/SUB C/ THE MICROWAVE CONDUCTIVITY WAS FOUND
400 DISTINCTLY SMALLER THAN THE DC CONDUCTIVITY APPARENTLY DUE TO THE
400 EXISTENCE OF CONDUCTIVE PATHS IN A FILAMENTLIKE STRUCTURE. HOWEVER
400 THE VALUES OF THE AC CONDUCTIVITY MEASURED AT FREQUENCIES UP TO 10
400 MHZ AGREE WITH THE DC VALUES. THE THERMAL EXPANSION CAN BE DETERMINED
400 FROM THE TEMPERATURE DEPENDENCE OF THE FREQUENCY SHIFT. THE MICROWAVE
400 CONDUCTIVITIES IN THE SUPERCONDUCTING RANGE ENABLE THE DETERMINATION
400 OF THE ENERGY GAP.
500 BARIUM COMPOUNDS; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE
500 SEMICONDUCTORS AND INSULATORS; HIGH-FREQUENCY EFFECTS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING ENERGY GAP; THERMAL
500 EXPANSION; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; MICROWAVE PROPERTIES; SINTERED
510 MATERIAL; SINGLE CRYSTALS; CAVITY PERTURBATION TECHNIQUE; MICROWAVE
510 CONDUCTIVITY; EDDY CURRENT LOSSES; DC CONDUCTIVITY; CONDUCTIVE PATHS;
510 FILAMENTLIKE STRUCTURE; AC CONDUCTIVITY; THERMAL EXPANSION;
510 TEMPERATURE DEPENDENCE; FREQUENCY SHIFT; ENERGY GAP; 4.6 TO 23 GHZ;
510 YBA/SUB 2/CU/SUB 3/O/SUB 7/.
550 YBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS.
560 FREQUENCY 4.6 E+09 TO 2.3 E+10 HZ.
DOCUMENT= 1502
AUTH = HOROVITZ
DT = 06
KN = B40891307767
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388925
002 B40891307767
010 CONFERENCE PAPER; THEORETICAL.
100 MANIFESTATIONS OF TWIN BOUNDARIES IN MARTENSITES AND IN
100 SUPERCONDUCTORS.
200 HOROVITZ, B.
220 LAB. OF ATOMIC ? SOLID STATE PHYS., CORNELL UNIV., ITHACA, NY, USA
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 21 MARCH 1989. VOL.29, NO.2-3, P.F575-84, REF.18
350 ISSN 0379-6779, CODEN SYMEDZ
400 A VARIETY OF PHYSICAL PROPERTIES OF MARTENSITES IN GENERAL AND OF
400 Y/SUB 1/BA/SUB 2/CU/SUB 3/O/SUB X/ IN PARTICULAR ARE CORRELATED WITH
400 STATICS AND DYNAMICS OF TWIN-BOUNDARIES. THE QUASI-TWO-DIMENSIONAL
400 OSCILLATIONS OF TWIN BOUNDARIES ('DYADONS') YIELD A T/SUP 2/ TERM IN
400 THE LOW TEMPERATURE SPECIFIC HEAT. ELECTRON-DYADON COUPLING
400 CONTRIBUTES TO THE LINEAR TEMPERATURE DEPENDENCE OF THE NORMAL STATE
400 RESISTIVITY. THIS COUPLING MAY ENHANCE T/SUB C/ IF THE
400 SUPERCONDUCTIVITY MECHANISM IS A STRONG COUPLING AND A STRONGLY
400 RETARDED ONE. TWIN BOUNDARIES CAN FORM JOSEPHSON JUNCTIONS AND
400 ACCOUNT FOR NONLINEAR CURRENT-VOLTAGE RELATIONS AND EXTREME
400 SENSITIVITY TO MAGNETIC FIELDS CLOSE TO T/SUB C/.
500 BARIUM COMPOUNDS; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE
500 SEMICONDUCTORS AND INSULATORS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 JOSEPHSON EFFECT; MARTENSITIC STRUCTURE; SPECIFIC HEAT OF SOLIDS;
500 TWIN BOUNDARIES; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE; SUPERCONDUCTIVITY; SUPERCONDUCTING TRANSITION
510 TEMPERATURE; DYADONS; ELECTRON-DYADON COUPLING; QUADRATIC TEMPERATURE
510 DEPENDENCE; TWIN BOUNDARIES; MARTENSITES; STATICS; DYNAMICS;
510 QUASI-TWO-DIMENSIONAL OSCILLATIONS; LOW TEMPERATURE SPECIFIC HEAT;
510 LINEAR TEMPERATURE DEPENDENCE; NORMAL STATE RESISTIVITY;
510 SUPERCONDUCTIVITY MECHANISM; JOSEPHSON JUNCTIONS; NONLINEAR
510 CURRENT-VOLTAGE RELATIONS; Y/SUB 1/BA/SUB 2/CU/SUB 3/O/SUB X/.
550 Y1BA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS Y1/SS O/SS Y/SS.
DOCUMENT= 1503
AUTH = TALIANI
DT = 06
KN = B40891307768
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388926
002 B40891307768
010 CONFERENCE PAPER; EXPERIMENTAL.
100 ELECTRONIC AND PHONON PHOTOINDUCED IR ABSORPTIONS IN THE YBA/SUB
100 2/CU/SUB 3/O/SUB 7-Y/ HIGH T/SUB C/ SUPERCONDUCTING SYSTEM.
200 TALIANI, C.; ZAMBONI, R.; RUANI, G. / MATACOTTA, F.C.
220 ISTITUTO DI SPETTROSCOPIA MOLECOLARE, CNR, BOLOGNA, ITALY
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 21 MARCH 1989. VOL.29, NO.2-3, P.F585-90, REF.18
350 ISSN 0379-6779, CODEN SYMEDZ
400 THE INFRARED PHOTOINDUCED ABSORPTION (PA) SPECTRUM OF THE
400 SEMICONDUCTING TETRAGONAL PHASE OF YBA/SUB 2/CU/SUB 3/O/SUB 7-Y/
400 (Y=0.79-0.85) IS INVESTIGATED IN THE 3200-350 CM/SUP -1/ SPECTRAL
400 RANGE AT LOW TEMPERATURE. A BROAD ELECTRONIC PA IS OBSERVED AT 0.13
400 EV AND IS ATTRIBUTED TO A DEEP MIDGAP HOLE STATE GENERATED BY
400 PHOTOEXCITATION OF E-H PAIRS. TWO PA PHONON BANDS OBSERVED AT 435 AND
400 510 CM/SUP -1/ CORRESPOND TO TOTALLY SYMMETRIC VIBRATIONS OF YBA/SUB
400 2/CU/SUB 3/O/SUB 7-Y/ INVOLVING THE CU-O BONDS PERPENDICULAR TO THE
400 CU-O PLANES. A VIBRONIC ACTIVATION MECHANISM IS PROPOSED IN ORDER TO
400 ACCOUNT FOR THEIR IR ACTIVITY AND THE NATURE OF THE 0.13 EV MIDGAP
400 HOLE STATE IS DISCUSSED IN THIS FRAMEWORK.
500 BARIUM COMPOUNDS; DEEP LEVELS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 IMPURITY AND DEFECT ABSORPTION SPECTRA OF INORGANIC SOLIDS; INFRARED
500 SPECTRA OF INORGANIC SOLIDS; LATTICE PHONONS; LIGHT ABSORPTION;
500 SUPERCONDUCTING SEMICONDUCTORS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; ELECTRON-HOLE PAIR
510 PHOTOGENERATION; PHONON PHOTOINDUCED ABSORPTION; ELECTRONIC
510 PHOTOINDUCED ABSORPTION; INFRARED PHOTOINDUCED ABSORPTION;
510 SEMICONDUCTING TETRAGONAL PHASE; LOW TEMPERATURE; DEEP MIDGAP HOLE
510 STATE; PHONON BANDS; TOTALLY SYMMETRIC VIBRATIONS; CU-O BONDS; CU-O
510 PLANES; VIBRONIC ACTIVATION MECHANISM; IR ACTIVITY; YBA/SUB 2/CU/SUB
510 3/O/SUB 7-Y/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1504
AUTH = ZAMBONI
DT = 06
KN = B40891307769
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388927
002 B40891307769
010 CONFERENCE PAPER; EXPERIMENTAL.
100 EVOLUTION OF THE IR PROPERTIES UPON THE OXYGEN VACANCY ORDERING IN
100 YBA/SUB 2/CU/SUB 3/O/SUB 7-Y/ (0U, IT DRIVES
400 SUPERCONDUCTIVITY WITH NO OTHER PAIRING AGENTS. VALUES OF THE
400 EXCHANGE-LIKE INTEGRALS FOR CU D- AND O P-ORBITALS ARE TABULATED.
400 RELEVANCE TO THE HIGH T/SUB C/ IN OXIDE SUPERCONDUCTORS IS BRIEFLY
400 DISCUSSED.
500 BAND THEORY MODELS AND CALCULATION METHODS; BCS THEORY; EXCHANGE
500 INTERACTIONS (ELECTRON); HIGH-TEMPERATURE SUPERCONDUCTORS.
510 MULTIBAND MODERATE U APPROACH; HIGH TEMPERATURE SUPERCONDUCTIVITY;
510 OXIDES; TWO-BAND SUPERCONDUCTOR MODEL; INTERBAND BCS-LIKE MATRIX
510 ELEMENTS; EXCHANGE-LIKE INTEGRAL; INTRABAND BCS INTERACTION; ON-SITE
510 COULOMB ENERGY; MEAN FIELD TREATMENT; PAIRING AGENTS.
550 CU/SS O/SS.
DOCUMENT= 1517
AUTH = SHINN
DT = 06
KN = B40891307782
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388940
002 B40891307782
010 CONFERENCE PAPER; EXPERIMENTAL.
100 LA/SUB 2/CUO/SUB 4+ DELTA /: A SUPERCONDUCTING SUPEROXIDE.
200 SHINN, N.D.; ROGERS, J.W.; SCHIRBER, J.E., JR.; VENTURINI, E.L.;
200 MOROSIN, B.; GINLEY, D.S.
220 SANDIA NAT. LABS., ALBUQUERQUE, NM, USA
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 21 MARCH 1989. VOL.29, NO.2-3, P.F709-14, REF.7
350 ISSN 0379-6779, CODEN SYMEDZ
400 RECENT EXPERIMENTAL STUDIES AT SANDIA NATIONAL LABORATORIES HAVE
400 SHOWN THAT HIGH PRESSURE OXYGEN ENRICHMENT (3 KBAR AT 875 K) OF
400 LA/SUB 2/CUO/SUB 4/ TRANSFORMS THIS SEMICONDUCTING CERAMIC MATERIAL
400 INTO A BULK SUPERCONDUCTOR WITH A T/SUB C/ APPROXIMATELY=30 K. A
400 VARIETY OF ANALYTICAL PROBES OF THE ENRICHED MATERIAL, LA/SUB
400 2/CUO/SUB 4+ DELTA /, INDICATE THAN (1) DELTA IS GREATER THAN ZERO IN
400 THE SUPERCONDUCTING PHASE; (2) THE LA:CU RATIO IS 2.00+OR-0.04; AND
400 (3) THE CHARGE DIFFERENTIAL INTRODUCED BY OXYGEN-ENRICHMENT AND
400 MEASURED BY AN IODOMETRIC TECHNIQUE IS LESS THAN 50% OF THE NUMBER OF
400 EXTRA OXYGEN ATOMS INTRODUCED. THESE OBSERVATIONS COUPLED WITH STERIC
400 CONSIDERATIONS LED TO THE PROPOSAL THAT THE EXTRA OXYGEN RESPONSIBLE
400 FOR THE SUPEROXIDE PHASE IS PRESENT AS INTERSTITIAL SUPEROXIDE O/SUP
400 -//SUB 2/ IONS. RECENT X-RAY PHOTOEMISSION SPECTROSCOPIC DATA IN
400 SUPPORT OF THIS HYPOTHESIS ARE PRESENTED, AND ALTERNATE MODELS ARE
400 EVALUATED.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; INTERSTITIALS; LANTHANUM COMPOUNDS;
500 STOICHIOMETRY; SUPERCONDUCTING TRANSITION TEMPERATURE; X-RAY
500 PHOTOELECTRON SPECTRA.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; HIGH PRESSURE O/SUB 2/
510 ENRICHMENT; STOICHIOMETRY; SUPERCONDUCTING SUPEROXIDE; BULK
510 SUPERCONDUCTOR; ANALYTICAL PROBES; LA:CU RATIO; CHARGE DIFFERENTIAL;
510 IODOMETRIC TECHNIQUE; STERIC CONSIDERATIONS; INTERSTITIAL SUPEROXIDE
510 O/SUP -//SUB 2/ IONS; X-RAY PHOTOEMISSION; MODELS; 3 KBAR; 30 K; 875
510 K; LA/SUB 2/CUO/SUB 4+ DELTA /.
550 LA2CUO/SS LA2/SS CU/SS LA/SS O/SS.
560 PRESSURE 3.0 E+08 PA; TEMPERATURE 3.0 E+01 K; TEMPERATURE 8.75 E+02
560 K.
DOCUMENT= 1518
AUTH = TANNER
DT = 06
KN = B40891307783
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388941
002 B40891307783
010 CONFERENCE PAPER; EXPERIMENTAL.
100 INFRARED STUDIES OF AB-PLANE ORIENTED YBA/SUB 2/CU/SUB 3/O/SUB 7-
100 DELTA /.
200 TANNER, D.B.; HERR, S.L.; KAMARAS, K.; PORTER, C.D.; TIMUSK, T. /
200 BONN, D.A.; GARRETT, J.D.; GREEDAN, J.E.; STAGER, C.V.; REEDYK, M.;
200 ETEMAD, S.; SIU-WAI CHAN
220 DEPT. OF PHYS., FLORIDA UNIV., GAINESVILLE, FL, USA
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 21 MARCH 1989. VOL.29, NO.2-3, P.F715-21, REF.12
350 ISSN 0379-6779, CODEN SYMEDZ
400 MEASUREMENTS OF THE INFRARED PROPERTIES PARALLEL TO THE
400 TWO-DIMENSIONAL CONDUCTING CU-O LAYERS OF THE HIGH-T/SUB C/ COMPOUND
400 YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / HAVE BEEN CARRIED OUT BETWEEN 300
400 K AND 4 K. SAMPLES HAVE INCLUDED TEXTURED CERAMICS, ORIENTED FILMS,
400 AND SMALL CRYSTALS. A STRONG, TEMPERATURE-INDEPENDENT ABSORPTION IS
400 OBSERVED IN THE MID-INFRARED, WITH A TEMPERATURE-DEPENDENT DRUDE
400 CONTRIBUTION IN THE FAR INFRARED. IN THE SUPERCONDUCTING STATE MOST
400 OF THE OSCILLATOR STRENGTH OF THE DRUDE ABSORPTION MOVES TO ZERO
400 FREQUENCY AND THE REFLECTANCE SPECTRUM IS DOMINATED BY A PLASMA EDGE
400 AT 500 CM/SUP -1/. A SUPERCONDUCTING GAP CANNOT BE SEEN IN THESE
400 SPECTRA.
500 BARIUM COMPOUNDS; CERAMICS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 INFRARED SPECTRA OF INORGANIC SOLIDS; REFLECTIVITY; SUPERCONDUCTING
500 THIN FILMS; TEXTURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE CONDUCTIVITY; INFRARED PROPERTIES; TWO-DIMENSIONAL
510 CONDUCTING CU-O LAYERS; TEXTURED CERAMICS; ORIENTED FILMS; SMALL
510 CRYSTALS; TEMPERATURE-INDEPENDENT ABSORPTION; TEMPERATURE-DEPENDENT
510 DRUDE CONTRIBUTION; SUPERCONDUCTING STATE; OSCILLATOR STRENGTH; ZERO
510 FREQUENCY; REFLECTANCE SPECTRUM; PLASMA EDGE; SUPERCONDUCTING GAP; 4
510 TO 300 K; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 4.0 E+00 TO 3.0 E+02 K.
DOCUMENT= 1519
AUTH = ZETTL
DT = 06
KN = B40891307784
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388942
002 B40891307784
010 CONFERENCE PAPER; EXPERIMENTAL.
100 ELECTRON-PHONON INTERACTIONS IN HIGH-TEMPERATURE OXIDE
100 SUPERCONDUCTORS: ISOTOPE EFFECTS AND ELASTICITY STUDIES.
200 ZETTL, A.; BOURNE, L.C.; CREAGER, W.N.; CROMMIE, M.F.; HOEN, S.
220 DEPT. OF PHYS., CALIFORNIA UNIV., BERKELEY, CA, USA
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 21 MARCH 1989. VOL.29, NO.2-3, P.F723-8, REF.10
350 ISSN 0379-6779, CODEN SYMEDZ
400 THE SUBSTITUTION OF DIFFERENT OXYGEN ISOTOPES INTO THE HIGH-T/SUB C/
400 OXIDE SUPERCONDUCTORS LA/SUB 1.85/SR/SUB 0.15/CUO/SUB 4/ AND YBA/SUB
400 2/CU/SUB 3/O/SUB 7/ IS INVESTIGATED BY TRANSPORT AND MAGNETIC
400 MEASUREMENTS. FOR BOTH MATERIALS, REPLACEMENT OF /SUP 16/O WITH /SUP
400 18/O DEPRESSES T/SUB C/ SLIGHTLY. THE OBSERVED SHIFTS ARE MUCH
400 SMALLER THAN THOSE EXPECTED FROM CONVENTIONAL ELECTRON-PHONON PAIRING
400 SUPERCONDUCTIVITY. THE AUTHORS ALSO EXPLORE THE ELASTIC PROPERTIES OF
400 LA-, Y-, AND BI-BASED HIGH-T/SUB C/ SUPERCONDUCTORS, INCLUDING SINGLE
400 CRYSTALS. ONLY LA/SUB 1.85/SR/SUB 0.15/CUO/SUB 4/ SHOWS A DRAMATIC
400 SOFT PHONON MODE ABOVE T/SUB C/.
500 BARIUM COMPOUNDS; ELASTICITY; ELECTRON-PHONON INTERACTIONS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; ISOTOPE EFFECTS; LANTHANUM
500 COMPOUNDS; LATTICE PHONONS; STRONTIUM COMPOUNDS; SUPERCONDUCTING
500 TRANSITION TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; TRANSPORT MEASUREMENTS;
510 SUPERCONDUCTING TRANSITION TEMPERATURE; MAGNETIC MEASUREMENTS;
510 HIGH-TEMPERATURE OXIDE SUPERCONDUCTORS; ISOTOPE EFFECTS; ELASTICITY;
510 ELECTRON-PHONON PAIRING SUPERCONDUCTIVITY; SINGLE CRYSTALS; DRAMATIC
510 SOFT PHONON MODE; LA/SUB 1.85/SR/SUB 0.15/CUO/SUB 4/; YBA/SUB
510 2/CU/SUB 3/O/SUB 7/; BISRCACUO.
550 BISRCACUO/SS BI/SS CA/SS CU/SS SR/SS O/SS; LA1.85SR0.15CUO4/SS
550 LA1.85/SS SR0.15/SS CU/SS LA/SS O4/SS SR/SS O/SS; YBA2CU3O7/SS BA2/SS
550 CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS.
DOCUMENT= 1520
AUTH = ZUO
DT = 06
KN = B40891307785
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388943
002 B40891307785
010 CONFERENCE PAPER; EXPERIMENTAL.
100 FIELD INDUCED FERROMAGNETIC COMPONENT IN SEMICONDUCTING LA/SUB
100 2-X/SR/SUB X/CUO/SUB 4- DELTA /.
200 ZUO, F.; CHEN, X.D.; GAINES, J.R.; EPSTEIN, A.J.
220 DEPT. OF PHYS., OHIO STATE UNIV., COLUMBUS, OH, USA
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 21 MARCH 1989. VOL.29, NO.2-3, P.F729-33, REF.16
350 ISSN 0379-6779, CODEN SYMEDZ
400 THE AUTHORS REPORT THE MAGNETIZATION M AS A FUNCTION OF MAGNETIC
400 FIELD H AND TEMPERATURE T FOR THE SEMICONDUCTING LA/SUB 2-X/SR/SUB
400 X/CUO/SUB 4- DELTA / SYSTEM. BELOW THE ANTIFERROMAGNETIC ORDERING
400 TEMPERATURE T/SUB N/, UPON APPLICATION OF HIGH FIELD AT SMALL
400 X(<0.02) FOR LA/SUB 1-X/SR/SUB X/CUO/SUB 4-/ DELTA , A STEPWISE
400 INCREASE IN M(H) HAS BEEN OBSERVED, SUGGESTIVE OF THE PRESENCE OF A
400 FERROMAGNETIC COMPONENT ABOVE A CRITICAL FIELD. ABOVE T/SUB N/, THERE
400 IS A SUBLINEAR BEHAVIOR OF M ON H. POSSIBLE MODELS ARE DISCUSSED FOR
400 THESE NOVEL PHENOMENA.
500 ANTIFERROMAGNETIC PROPERTIES OF SUBSTANCES; FERROMAGNETIC PROPERTIES
500 OF SUBSTANCES; HIGH-TEMPERATURE SUPERCONDUCTORS; LANTHANUM COMPOUNDS;
500 MAGNETISATION; STRONTIUM COMPOUNDS; SUPERCONDUCTING SEMICONDUCTORS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; MAGNETIC FIELD EFFECTS;
510 MAGNETIZATION; SEMICONDUCTING LA/SUB 2-X/SR/SUB X/CUO/SUB 4- DELTA /
510 SYSTEM; ANTIFERROMAGNETIC ORDERING TEMPERATURE; STEPWISE INCREASE;
510 FERROMAGNETIC COMPONENT; CRITICAL FIELD; SUBLINEAR BEHAVIOR; NOVEL
510 PHENOMENA.
DOCUMENT= 1521
AUTH = YOSHIZAK
DT = 06
KN = B40891307786
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388944
002 B40891307786
010 CONFERENCE PAPER; EXPERIMENTAL.
100 THE 36 K AND 40 K SUPERCONDUCTIVITIES OF LA/SUB 2/CUO/SUB 4-Y/.
200 YOSHIZAKI, R.; SAWADA, H.; IWAZUMI, T. / IKEDA, H.
220 TSUKUBA UNIV., IBARAKI, JAPAN
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 21 MARCH 1989. VOL.29, NO.2-3, P.F735-40, REF.9
350 ISSN 0379-6779, CODEN SYMEDZ
400 WHEN THE UNDOPED LA/SUB 2/CUO/SUB 4-Y/ SAMPLE IS COOLED IN A MAGNETIC
400 FIELD FROM A TEMPERATURE HIGHER THAN 150 K, THE ONSET TEMPERATURE OF
400 THE SUPERCONDUCTING TRANSITION TEMPERATURE SHIFTS FROM 36 K TO 40 K
400 AND THE SUPERCONDUCTING DIAMAGNETISM GROWS CONSIDERABLY. THESE FACTS
400 SUGGEST THAT A 40 K SUPERCONDUCTOR APPEARS BESIDES THE 36 K
400 SUPERCONDUCTOR DUE TO THE COOLING OF THE SAMPLE UNDER A MAGNETIC
400 FIELD FROM HIGH TEMPERATURE. TEMPERATURE DEPENDENCE OF A REMANENT
400 MAGNETIC MOMENT IS DISCUSSED WITH RELEVANCE TO THE APPEARANCE OF THE
400 40 K SUPERCONDUCTOR.
500 DIAMAGNETIC PROPERTIES OF SUBSTANCES; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LANTHANUM COMPOUNDS; MAGNETIC MOMENTS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; MAGNETIC FIELD COOLING;
510 TEMPERATURE DEPENDENCE; ONSET TEMPERATURE; SUPERCONDUCTING TRANSITION
510 TEMPERATURE SHIFTS; SUPERCONDUCTING DIAMAGNETISM; REMANENT MAGNETIC
510 MOMENT; 40 K; 36 K; LA/SUB 2/CUO/SUB 4-Y/.
550 LA2CUO/SS LA2/SS CU/SS LA/SS O/SS.
560 TEMPERATURE 4.0 E+01 K; TEMPERATURE 3.6 E+01 K.
DOCUMENT= 1522
AUTH = PARK
DT = 06
KN = B40891307787
LG = ENGL
SN = ISSN 0379-6779
YR = 89
000 3388945
002 B40891307787
010 CONFERENCE PAPER; EXPERIMENTAL.
100 THERMOELECTRIC POWER STUDY OF THE HIGH T/SUB C/ SUPERCONDUCTOR:
100 Y-BA-CU-O.
200 PARK, Y.W.; KIM, J.J.; LEE, B.C.; SONG, Y.S. / JANG, M.S.; KIM, H.K.
220 DEPT. OF PHYS., SEOUL NAT. UNIV., SOUTH KOREA
300 INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF SYNTHETIC
300 METALS (ICSM '88).
305 SANTA FE, NM, USA. 26 JUNE-2 JULY 1988. LOS ALAMOS NAT. LAB.
310 SYNTH. MET. (SWITZERLAND)
330 21 MARCH 1989. VOL.29, NO.2-3, P.F741-4, REF.8
350 ISSN 0379-6779, CODEN SYMEDZ
400 TEMPERATURE DEPENDENT THERMOELECTRIC POWER OF THE HIGH T/SUB C/
400 SUPERCONDUCTOR Y/SUB X/BA/SUB Y/CU/SUB Z/O WITH VARIOUS COMBINATIONS
400 OF X:Y:Z ARE STUDIED TO INVESTIGATE THE ELECTRONIC STRUCTURE. THE
400 RESULTS ARE VERY SENSITIVE TO THE COMPOSITION RATIOS AND THE
400 PREPARATION CONDITIONS OF Y-BA-CU-O EVEN IF THE SUPERCONDUCTING
400 TRANSITION TEMPERATURES ARE MORE OR LESS IDENTICAL (T/SUB C/
400 APPROXIMATELY=90 K). A SYSTEMATIC APPROACH TO UNDERSTAND THE
400 EVOLUTION OF THE BAND STRUCTURE UPON DIFFERENT COMPOSITIONS OF
400 Y-BA-CU-O IS PRESENTED.
500 BAND STRUCTURE OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS; BARIUM
500 COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; MATERIALS PREPARATION;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; THERMOELECTRIC EFFECTS IN
500 SEMICONDUCTORS AND INSULATORS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTIVITY; TEMPERATURE DEPENDENT
510 THERMOELECTRIC POWER; ELECTRONIC STRUCTURE; COMPOSITION RATIOS;
510 PREPARATION CONDITIONS; SUPERCONDUCTING TRANSITION TEMPERATURES; BAND
510 STRUCTURE; 90 K; Y/SUB X/BA/SUB Y/CU/SUB Z/O.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 9.0 E+01 K.
DOCUMENT= 1523
AUTH = CROSS
DT = 06
KN = B40891307827
LG = ENGL
SN = ISSN 0040-6090
YR = 88
000 3388985
002 B40891307827
010 CONFERENCE PAPER; EXPERIMENTAL.
100 X-RAY MICROFLUORESCENCE ANALYZER FOR MULTILAYER METAL FILMS.
200 CROSS, B.J.; WHERRY, D.C.
220 KEVEX CORP., SAN CARLOS, CA, USA
300 15TH INTERNATIONAL CONFERENCE ON METALLURGICAL COATINGS.
305 SAN DIEGO, CA, USA. 11-15 APRIL 1988. AMERICAN VACUUM SOC.. VACUUM
305 SOC. JAPAN. INT. UNION OF VACUUM SCI.. ET AL.
310 THIN SOLID FILMS (SWITZERLAND)
330 1 DEC. 1988. VOL.166, P.263-72, REF.16
350 ISSN 0040-6090, CODEN THSFAP
400 AN X-RAY MICROFLUORESCENCE ANALYZER IS DESCRIBED WHICH COMBINES THE
400 NON-DESTRUCTIVE ANALYTICAL METHOD OF X-RAY FLUORESCENCE WITH
400 RELATIVELY SMALL SPATIAL DISCRIMINATION (LESS THAN 50 MU M) SUCH THAT
400 COMPOSITION (CHEMISTRY), THICKNESS AND MICROSTRUCTURAL MEASUREMENTS
400 CAN BE MADE ON A WIDE VARIETY OF HETEROGENEOUS MATERIALS IN A FEW
400 SECONDS. BY SCANNING SAMPLES WITH AN X-Y STAGE, QUANTITATIVE OR
400 QUALITATIVE MICROSTRUCTURAL INFORMATION CAN BE GATHERED. QUANTITATIVE
400 ANALYSES, OBTAINED USING FUNDAMENTAL PARAMETER THIN FILM SOFTWARE,
400 ARE PRESENTED FOR SELENIUM FILMS ON ALUMINUM SUBSTRATES,
400 SUPERCONDUCTOR FILMS ON MAGNESIUM OXIDE, AND SILVER ON NICKEL ON A
400 COPPER SUBSTRATE. IN ADDITION, QUALITATIVE LINE SCAN PROFILES ARE
400 SHOWN FOR A SUPERCONDUCTOR SAMPLE. SOME RESULTS ARE COMPARED WITH
400 OTHER ANALYTICAL TECHNIQUES, SUCH AS ELECTRON PROBE MICROANALYSIS,
400 AND SHOW SIMILAR ANALYTICAL ACCURACIES WITHOUT THE NEED FOR SPECIAL
400 SAMPLE PREPARATION OR DESTRUCTIVE ANALYSIS.
500 ALUMINIUM; CRYSTAL MICROSTRUCTURE; METALLIC THIN FILMS; NICKEL;
500 SELENIUM; SILVER; SUPERCONDUCTING THIN FILMS; THICKNESS MEASUREMENT;
500 X-RAY FLUORESCENCE ANALYSIS; X-RAY SPECTROMETERS.
510 QUANTITATIVE ANALYSIS; ENERGY DISPERSIVE ANALYSIS; X-RAY
510 MICROFLUORESCENCE ANALYZER; MULTILAYER METAL FILMS; NON-DESTRUCTIVE
510 ANALYTICAL METHOD; COMPOSITION; THICKNESS; MICROSTRUCTURAL
510 MEASUREMENTS; HETEROGENEOUS MATERIALS; FUNDAMENTAL PARAMETER THIN
510 FILM SOFTWARE; SUPERCONDUCTOR FILMS; QUALITATIVE LINE SCAN PROFILES;
510 ANALYTICAL ACCURACIES; SE FILMS; SE-AL MULTILAYERS; CU SUBSTRATE; AL
510 SUBSTRATES; MGO SUBSTRATE; AG-NI MULTILAYERS; (AG-NI)-CU.
550 SE/EL; SEAL/BIN AL/BIN SE/BIN; CU/SUR CU/EL; AL/SUR AL/EL; MGO/SUR
550 MG/SUR O/SUR MGO/BIN MG/BIN O/BIN; AGNI/BIN AG/BIN NI/BIN; AGNICU/SS
550 AG/SS CU/SS NI/SS.
DOCUMENT= 1524
AUTH = MEYER
DT = 06
KN = B40891308596
LG = ENGL
SN = ISBN 4-588-97001-1
YR = 88
000 3389754
002 B40891308596
010 CONFERENCE PAPER; EXPERIMENTAL.
100 PROPERTIES OF YBA/SUB 2/CU/SUB 3/O/SUB 7/ THIN FILMS PREPARED BY
100 SPUTTERING AND THE INFLUENCE OF ION-IRRADIATION.
200 MEYER, O.; EGNER, B.; GEERK, J.; LI, H.C.; LINKER, G.; STREHLAU, B.;
200 XI, X.X.
220 KERNFORSCHUNGSZENTRUM KARLSRUHE, INST. FUR NUKLEARE FESTKORPERPHYS.,
220 WEST GERMANY
300 APPLICATION OF ION BEAMS IN MATERIALS SCIENCE. PROCEEDINGS OF THE
300 12TH INTERNATIONAL SYMPOSIUM OF HOSEI UNIVERSITY.
305 TOKYO, JAPAN. 2-4 SEPT. 1987. HOSEI UNIV.
310 JAPAN
320 SEBE, T.; YAMAMOTO, Y.
330 TOKYO, JAPAN: HOSEI UNIV. PRESS, 1988. XV+531P., P.127-33, REF.23
350 ISBN 4-588-97001-1
400 THIN SUPERCONDUCTING FILMS OF THE NOMINAL COMPOSITION YBA/SUB
400 2/CU/SUB 3/O/SUB 7/ HAVE BEEN PREPARED BY MAGNETRON SPUTTER
400 DEPOSITION AND SUBSEQUENT TEMPERATURE TREATMENT. THE COMPOSITION OF
400 THE FILMS HAS BEEN DETERMINED BY RUTHERFORD BACKSCATTERING AND THE
400 STRUCTURE BY THIN FILM X-RAY DIFFRACTION. THESE FILMS HAVE BEEN
400 IRRADIATED AT 293 K AND 77 K WITH H, HE AND AR IONS. INDEPENDENT OF
400 THE MASS AND THE ENERGY OF THE INCIDENT IONS THE T/SUB C/ REDUCTION
400 BELOW 4.2 K OCCURRED IN THE REGION BETWEEN 2*10/SUP -3/ AND
400 1.6*10/SUP -2/ DISPLACEMENTS PER ATOM (DPA). FOR DPA VALUES GREATER
400 THAN 4*10/SUP -3/ (0.2 EV/ATOM) A STRONG INCREASE OF THE RESISTANCE
400 WAS NOTED INDICATING A METALLIC TO INSULATING TRANSFORMATION. THE
400 ORTHORHOMBIC TO TETRAGONAL PHASE TRANSFORMATION OCCURRED BETWEEN 0.01
400 AND 0.03 DPA WHILE THE TRANSFORMATION INTO THE AMORPHOUS PHASE WAS
400 OBSERVED AT ABOUT 0.1 DPA AFTER HE IRRADIATION AT 77 K. THE DAMAGE
400 MECHANISMS WHICH ARE RESPONSIBLE FOR ALL THIS CHANGES ARE DISCUSSED.
500 ION BEAM EFFECTS; METAL-INSULATOR TRANSITION; RUTHERFORD
500 BACKSCATTERING; SPUTTER DEPOSITION; SUPERCONDUCTING THIN FILMS; X-RAY
500 DIFFRACTION EXAMINATION OF MATERIALS.
510 CRITICAL TEMPERATURE; HIGH TEMPERATURE SUPERCONDUCTOR;
510 ION-IRRADIATION; MAGNETRON SPUTTER DEPOSITION; TEMPERATURE TREATMENT;
510 COMPOSITION; RUTHERFORD BACKSCATTERING; STRUCTURE; X-RAY DIFFRACTION;
510 RESISTANCE; METALLIC TO INSULATING TRANSFORMATION; ORTHORHOMBIC TO
510 TETRAGONAL PHASE TRANSFORMATION; AMORPHOUS PHASE; DAMAGE; YBA/SUB
510 2/CU/SUB 3/O/SUB 7/ THIN FILMS; H; HE; AR.
550 YBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS; H/EL; HE/EL;
550 AR/EL.
DOCUMENT= 1525
AUTH = CARBOTTE
DT = 06
KN = B40891309296
LG = ENGL
YR = 88
000 3390454
002 B40891309296
010 CONFERENCE PAPER; BIBLIOGRAPHY, REVIEW, THEORETICAL.
100 SUPERCONDUCTIVITY OF THE HIGH T/SUB C/ OXIDES.
200 CARBOTTE, J.P.
220 DEPT. OF PHYS., MCMASTER UNIV., HAMILTON, ONT., CANADA
300 CAP-NSERC SUMMER INSTITUTE IN THEORETICAL PHYSICS.
305 EDMONTON, ALTA., CANADA. 10-25 JULY 1987.
310 SINGAPORE
320 KHANNA, F.C.; UMEZAWA, H.; KUNSTATTER, G.; LEE, H.C.
330 SINGAPORE: WORLD SCIENTIFIC, 1988. 2 VOL. (X+462+X+446)P., P.28-55
330 VOL.1, REF.70
400 THE AUTHOR REVIEWS THE EVIDENCE THAT IT IS THE ELECTRON-PHONON
400 INTERACTION WHICH IS RESPONSIBLE FOR THE SUPERCONDUCTIVITY OF ALL THE
400 CONVENTIONAL SUPERCONDUCTORS. EXCLUDED FROM THIS CLASS ARE THE
400 ORGANIC METALS AND THE HEAVY FERMION SUPERCONDUCTORS AND NOW THE NEW
400 HIGH T/SUB C/ OXIDES. WHILE THE ELECTRON-PHONON INTERACTION MAY BE
400 SIGNIFICANT IN THE OXIDES, ARGUMENTS HAVE BEEN PUT FORWARD THAT SOME
400 ADDITIONAL MECHANISM MAY ALSO BE PRESENT. IN PARTICULAR THERE IS SOME
400 EVIDENCE FOR AN ELECTRONIC OR EXCITON CONTRIBUTION. WHILE WE STUDY
400 THIS POSSIBILITY, NO DEFINITIVE CONCLUSION AS TO THE CORRECT
400 ADMIXTURE OF PHONONS AND EXCITONS CAN BE REACHED AT THE PRESENT TIME
400 BECAUSE OF UNCERTAINTIES IN THE DATA. THE NEED FOR MORE EXPERIMENTS
400 IS EMPHASIZED.
500 ELECTRON-PHONON INTERACTIONS; EXCITONS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; REVIEWS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; ELECTRONIC CONTRIBUTION; HIGH T/SUB
510 C/ OXIDES; ELECTRON-PHONON INTERACTION; SUPERCONDUCTIVITY; ORGANIC
510 METALS; HEAVY FERMION SUPERCONDUCTORS; EXCITON CONTRIBUTION.
DOCUMENT= 1526
AUTH = CRABTREE
DT = 06
KN = B40891309297
LG = ENGL
YR = 88
000 3390455
002 B40891309297
010 CONFERENCE PAPER; BIBLIOGRAPHY, REVIEW, EXPERIMENTAL.
100 BASIC PROPERTIES OF COPPER OXIDE SUPERCONDUCTORS.
200 CRABTREE, G.W.; KWOK, W.K.; UMEZAWA, A.
220 DIV. OF MATER. SCI., ARGONNE NAT. LAB., IL, USA
300 CAP-NSERC SUMMER INSTITUTE IN THEORETICAL PHYSICS.
305 EDMONTON, ALTA., CANADA. 10-25 JULY 1987.
310 SINGAPORE
320 KHANNA, F.C.; UMEZAWA, H.; KUNSTATTER, G.; LEE, H.C.
330 SINGAPORE: WORLD SCIENTIFIC, 1988. 2 VOL. (X+462+X+446)P., P.408-42
330 VOL.1, REF.94
400 THE AUTHORS DESCRIBE THE SALIENT FEATURES OF THE LA/SUB 2-X/M/SUB
400 X/CUO/SUB 4/ COMPOUNDS WHERE M=CA, SR, OR BA WHICH SUPERCONDUCT AT
400 TEMPERATURES NEAR 40 K, AND THE YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /
400 COMPOUNDS WHICH SUPERCONDUCT NEAR 90 K. ALTHOUGH A GREAT DEAL IS
400 KNOWN ABOUT THE PROPERTIES OF THESE MATERIALS, NEW INFORMATION ON THE
400 ROLE OF MATERIALS PARAMETERS LIKE OXYGEN AND METAL VACANCIES, TWIN
400 PLANES, GRAIN BOUNDARIES, IMPURITY ATOMS, AND PREPARATION TECHNIQUES
400 IS STILL EMERGING. THEREFORE THEY CONCENTRATE ON THE MOST GENERAL AND
400 FUNDAMENTAL PROPERTIES AFFECTING SUPERCONDUCTIVITY IN ORDER TO GIVE
400 AN OVERVIEW OF THE FIELD AT THIS TIME, POINTING OUT SOME OF THE
400 INTERESTING QUESTIONS WHICH ARE STILL UNRESOLVED.
500 BARIUM COMPOUNDS; GRAIN BOUNDARIES; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 IMPURITIES; LANTHANUM COMPOUNDS; REVIEWS; TWIN BOUNDARIES; VACANCIES
500 (CRYSTAL); YTTRIUM COMPOUNDS.
510 CU OXIDE HIGH TEMPERATURE SUPERCONDUCTORS; MATERIALS PARAMETERS;
510 METAL VACANCIES; TWIN PLANES; GRAIN BOUNDARIES; IMPURITY ATOMS;
510 PREPARATION TECHNIQUES; 40 K; 90 K; YBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA
510 / COMPOUNDS; LA/SUB 2-X/CA/SUB X/CUO/SUB 4/; LA/SUB 2-X/SR/SUB
510 X/CUO/SUB 4/; LA/SUB 2-X/BA/SUB X/CUO/SUB 4/.
550 LACACUO4/SS CA/SS CU/SS LA/SS O4/SS O/SS; LASRCUO4/SS CU/SS LA/SS
550 O4/SS SR/SS O/SS; LABACUO4/SS BA/SS CU/SS LA/SS O4/SS O/SS;
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 4.0 E+01 K; TEMPERATURE 9.0 E+01 K.
DOCUMENT= 1527
AUTH = ELLIALTI
DT = 06
KN = B40891309473
LG = ENGL
SN = ISBN 0-306-42995-0
YR = 88
000 3390631
002 B40891309473
010 CONFERENCE PAPER; THEORETICAL.
100 ELECTRONIC PROPERTIES OF CUO/SUB 2/ LAYERS IN HIGH T/SUB C/
100 MATERIALS.
200 ELLIALTIOGLU, S.; DURGUT, M.
220 DEPT. OF PHYS., MIDDLE EAST TECH. UNIV., ANKARA, TURKEY
300 PHYSICS, FABRICATION AND APPLICATIONS OF MULTILAYERED STRUTURES.
300 PROCEEDINGS OF A NATO ADVANCED STUDY INSTITUTE.
305 ILE DE BENDOR, BANDOL, FRANCE. 22 JUNE-4 JULY 1987.
310 USA
320 DHEZ, P.; WEISBUCH, C.
330 NEW YORK, NY, USA: PLENUM, 1988. XIII+416P., P.376, REF.0
350 ISBN 0-306-42995-0
400 SUMMARY FORM ONLY GIVEN, AS FOLLOWS. THE HIGH T/SUB C/ MATERIALS OF
400 LA-SR-CU-O AND OF Y-BA-CU-O STRUCTURES ARE BOTH INVESTIGATED BY THE
400 USE OF A SIMPLE LCAO MODEL. THE LOCAL DENSITIES OF STATES HAVE SHOWN
400 BOTH TWO-DIMENSIONAL AND ONE-DIMENSIONAL BEHAVIOR WITHIN DIFFERENT
400 ENERGY REGIONS. AROUND THE FERMI LEVEL THE DIMENSIONALITY AND THE
400 TYPE OF VAN HOVE SINGULARITIES BECOME IMPORTANT FOR THE ENHANCEMENT
400 OF THE CRITICAL TEMPERATURE. THE BCS PARAMETERS LIKE THE
400 SUPERCONDUCTING GAP, CRITICAL TEMPERATURE AND THE DEBYE FREQUENCY
400 WERE CALCULATED AND THEIR DEPENDENCE ON THE DENSITY OF STATES HAS
400 BEEN ILLUSTRATED.
500 BARIUM COMPOUNDS; ELECTRONIC DENSITY OF STATES; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; LANTHANUM COMPOUNDS; LCAO CALCULATIONS; STRONTIUM
500 COMPOUNDS; SUPERCONDUCTING ENERGY GAP; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ELECTRONIC PROPERTIES; TWO
510 DIMENSIONAL BEHAVIOUR; CUO/SUB 2/ LAYERS; HIGH T/SUB C/ MATERIALS;
510 SIMPLE LCAO MODEL; LOCAL DENSITIES OF STATES; ONE-DIMENSIONAL
510 BEHAVIOR; FERMI LEVEL; VAN HOVE SINGULARITIES; CRITICAL TEMPERATURE;
510 BCS PARAMETERS; SUPERCONDUCTING GAP; DEBYE FREQUENCY; LA-SR-CU-O;
510 Y-BA-CU-O.
550 LASRCUO/SS CU/SS LA/SS SR/SS O/SS; YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1528
AUTH = PAULUS
DT = 02
KN = B40891310035
LG = ENGL
SN = ISSN 0044-2968
YR = 88
000 3391193
002 B40891310035
010 JOURNAL PAPER; EXPERIMENTAL.
100 ROOM TEMPERATURE X-RAY CRYSTAL STRUCTURE ANALYSIS OF A TWINNED
100 CRYSTAL OF HIGH-T/SUB C/ SUPERCONDUCTING YBA/SUB 2/CU/SUB 3/O/SUB
100 7-X/ (0>H/SUB P/ (H/SUB P/ IS THE FIELD OF FULL PENETRATION), THE
400 DEPENDENCE OF AC LOSSES OMEGA ON TEMPERATURE T FOLLOWS AN EXPONENTIAL
400 LAW: OMEGA = ALPHA E/SUP - BETA T/, WHICH CANNOT BE TREATED WITHIN A
400 MECHANISM CONTROLLED BY FLUX CREEP.
500 BARIUM COMPOUNDS; FLUX CREEP; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 MAGNETIC HYSTERESIS; RARE EARTH COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; HYSTERETIC AC LOSSES;
510 MAGNETIZATION; SWEEPING FIELD; FLUX CREEP; GDBA/SUB 2/CU/SUB 3/O/SUB
510 7-Y/; ERBA/SUB 2/CU/SUB 3/O/SUB 7-Y/; DYBA/SUB 2/CU/SUB 3/O/SUB 7-Y/;
510 EUBA/SUB 2/CU/SUB 3/O/SUB 7-Y/; YBA/SUB 2/CU/SUB 3/O/SUB 7-Y/.
550 GDBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS GD/SS O/SS; ERBA2CU3O/SS
550 BA2/SS CU3/SS BA/SS CU/SS ER/SS O/SS; DYBA2CU3O/SS BA2/SS CU3/SS
550 BA/SS CU/SS DY/SS O/SS; EUBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS EU/SS
550 O/SS; YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1533
AUTH = HWANG
DT = 02
KN = B40891400261
LG = ENGL
SN = ISSN 0003-6951
YR = 89
000 3391490
002 B40891400261
010 JOURNAL PAPER; EXPERIMENTAL.
100 MICROSTRUCTURE OF IN SITU EPITAXIALLY GROWN SUPERCONDUCTING Y-BA-CU-O
100 THIN FILMS.
200 HWANG, D.M.; VENKATESAN, T.; CHANG, C.C.; NAZAR, L. / WU, X.D.; INAM,
200 A.; HEGDE, M.S.
220 BELL COMMUN. RES., RED BANK, NJ, USA
310 APPL. PHYS. LETT. (USA)
330 24 APRIL 1989. VOL.54, NO.17, P.1702-4, REF.15
350 ISSN 0003-6951, CODEN APPLAB
400 THE MICROSTRUCTURE OF IN SITU EPITAXIALLY GROWN Y-BA-CU-O THIN FILMS
400 ON (001) SRTIO/SUB 3/ SUBSTRATES WAS STUDIED USING CROSS-SECTIONAL
400 TRANSMISSION ELECTRON MICROSCOPY. THE FILMS, PREPARED BY PULSED LASER
400 DEPOSITION AT SUBSTRATE HOLDER TEMPERATURE OF 650 DEGREES C WITHOUT
400 POST-ANNEALING, EXHIBIT ZERO RESISTIVITY ABOVE 90 K AND CRITICAL
400 CURRENTS EXCEEDING 10/SUP 6/ A/CM/SUP 2/ AT 77 K. THE FILMS ARE OF
400 HEAVILY FAULTED SINGLE CRYSTALLINE STRUCTURE WITH THE C AXIS
400 APPROXIMATELY PERPENDICULAR TO THE SUBSTRATE (001) SURFACE. THE
400 AUTHORS SUGGEST THAT, DUE TO THE FAST QUENCHING AND LOW SUBSTRATE
400 TEMPERATURE, CRYSTALLINE DEFECTS AND CHEMICAL FLUCTUATIONS ARE LOCKED
400 INTO A FAULTED STRUCTURE AFTER EACH LASER PULSE. DESPITE THEIR RATHER
400 IMPERFECT MICROSTRUCTURE, THE FILMS ARE FREE FROM MACROSCOPIC GRAIN
400 BOUNDARIES AND SECONDARY PHASES AND POSSESS SUPERB SUPERCONDUCTING
400 PROPERTIES.
500 BARIUM COMPOUNDS; CRITICAL CURRENT DENSITY (SUPERCONDUCTIVITY);
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SUPERCONDUCTING EPITAXIAL LAYERS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; TRANSMISSION ELECTRON
500 MICROSCOPE EXAMINATION OF MATERIALS; VAPOUR PHASE EPITAXIAL GROWTH;
500 YTTRIUM COMPOUNDS.
510 IN SITU EPITAXIAL GROWTH; HIGH TEMPERATURE SUPERCONDUCTOR;
510 CROSS-SECTIONAL TRANSMISSION ELECTRON MICROSCOPY; PULSED LASER
510 DEPOSITION; ZERO RESISTIVITY; CRITICAL CURRENTS; SINGLE CRYSTALLINE;
510 QUENCHING; CRYSTALLINE DEFECTS; CHEMICAL FLUCTUATIONS; FAULTED
510 STRUCTURE; MICROSTRUCTURE; 90 K; Y-BA-CU-O THIN FILMS.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 9.0 E+01 K.
DOCUMENT= 1534
AUTH = STANKOWS
DT = 02
KN = B40891400316
LG = ENGL
SN = ISSN 0587-4246
YR = 89
000 3391545
002 B40891400316
010 JOURNAL PAPER; APPLICATIONS, EXPERIMENTAL.
100 MICROWAVE SQUID BASED ON INTERNAL JOSEPHSON EFFECT IN Y-BA-CUO BULK
100 SUPERCONDUCTOR.
200 STANKOWSKI, J.; KOWALIK, Z.J.; BIELECKI, K.
220 INST. OF MOLECULAR PHYS., POLISH ACAD. OF SCI., POZNAN, POLAND
310 ACTA PHYS. POL. A (POLAND)
330 APRIL 1989. VOL.A75, NO.4, P.553-8, REF.17
350 ISSN 0587-4246, CODEN ATPLB6
400 THE NEW APPLICATION OF THE INTERNAL JOSEPHSON EFFECT IN HTS-CERAMICS
400 TO THE CONSTRUCTION OF THE MICROWAVE-BULK-SQUID (MB-SQUID) IS
400 DEMONSTRATED. THE STANDARD X-BAND EPR TECHNIQUE WAS USED HERE AS THE
400 DETECTION METHOD OF THE SIGNAL PROPORTIONAL TO THE CHANGES OF
400 EXTERNAL MAGNETIC FLUX. A TYPICAL 'TRIANGLE CHARACTERISTICS' WAS ALSO
400 OBSERVED.
500 BARIUM COMPOUNDS; CERAMICS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 JOSEPHSON EFFECT; SQUIDS; YTTRIUM COMPOUNDS.
510 MICROWAVE SQUID; HIGH TEMPERATURE SUPERCONDUCTOR; INTERNAL JOSEPHSON
510 EFFECT; BULK SUPERCONDUCTOR; CERAMICS; STANDARD X-BAND EPR TECHNIQUE;
510 EXTERNAL MAGNETIC FLUX; YBACUO.
550 YBACUO/INT BA/INT CU/INT O/INT Y/INT YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1535
AUTH = JAEGER
DT = 02
KN = B40891400431
LG = GERM
SN = ISSN 0173-9913
YR = 89
000 3391660
002 B40891400431
010 JOURNAL PAPER; EXPERIMENTAL.
100 MICROSTRUCTURAL OPTIMIZATION OF SUPERCONDUCTING OXIDES.
200 JAEGER, H.; ASLAN, M.; BOHSMANN, M.; MULLER, G.; SCHULZE, K.; PETZOW,
200 G.
220 MAX-PLANCK-INST. FUR METALLFORSCHUNG, INST. FUR
220 WERKSTOFFWISSENSCHAFTEN, PULVERMETALLURGISCHES LAB., STUTTGART, WEST
220 GERMANY
310 CFI - CERAM. FORUM INT. - BER. DTSCH. KERAM. GES. (WEST GERMANY)
330 MARCH-APRIL 1989. VOL.66, NO.3-4, P.108-12, REF.6. (IN GERMAN
330 ENGLISH)
350 ISSN 0173-9913, CODEN CCFDD7
400 MOST CERAMIC YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ SAMPLES ARE PREPARED USING
400 POWDER-METALLURGICAL TECHNIQUES, AND SAMPLE PREPARATION GENERALLY
400 COMPRISES THREE MAIN STEPS: (1) POWDER PREPARATION AND CALCINING, (2)
400 SINTERING AND (3) ADJUSTING THE OXYGEN CONTENT. THE MICROSTRUCTURE OF
400 THE SAMPLE MATERIAL IS DIRECTLY AFFECTED BY THE CONDITIONS OF POWDER
400 PREPARATION, CALCINING AND SINTERING AND BY THE ANNEALING PARAMETERS
400 USED FOR OBTAINING THE DESIRED OXYGEN CONTENT. HENCE, THOSE
400 CONDITIONS ARE OF DECISIVE IMPORTANCE WITH REGARD TO THE MATERIAL'S
400 ULTIMATE MECHANICAL AND SUPERCONDUCTING PROPERTIES. IN THIS PAPER,
400 THE VARIOUS STAGES OF YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ PRODUCTION ARE
400 DEALT WITH, AND THEIR EFFECTS ON MICROSTRUCTURE AND SUPERCONDUCTING
400 PROPERTIES ARE DISCUSSED.
500 ANNEALING; BARIUM COMPOUNDS; CERAMICS; CRYSTAL MICROSTRUCTURE;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SINTERING; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CERAMIC; POWDER PREPARATION;
510 CALCINING; SINTERING; MICROSTRUCTURE; ANNEALING; YBA/SUB 2/CU/SUB
510 3/O/SUB 7-X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1536
AUTH = GANGULI
DT = 02
KN = B40891400672
LG = ENGL
NF = MGU6058
SN = ISSN 0722-3277
YR = 89
000 3391901
002 B40891400672
010 JOURNAL PAPER; EXPERIMENTAL.
100 AN INVESTIGATION OF THE PRBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / SYSTEM.
200 GANGULI, A.K.; RAO, C.N.R. / SEQUEIRA, A.; RAJAGOPAL, H.
220 SOLID STATE ? STRUCTURAL CHEM. UNIT, INDIAN INST. OF SCI., BANGALORE,
220 INDIA
310 Z. PHYS. B, CONDENS. MATTER (WEST GERMANY)
330 1989. VOL.74, NO.2, P.215-19, REF.9
350 ISSN 0722-3277, CODEN ZPCMDN
400 MEMBERS OF THE PRBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / SYSTEM POSSESSING
400 THE ORTHORHOMBIC STRUCTURE OVER A WIDE RANGE OF OXYGEN STOICHIOMETRY
400 ( DELTA =-0.5 TO +0.5) HAVE BEEN PREPARED AND CHARACTERIZED. SIMILAR
400 COMPOSITIONS WITH A TETRAGONAL STRUCTURE HAVE ALSO BEEN PREPARED.
400 NONE OF THE OXIDES IS SUPERCONDUCTING, INDEPENDENT OF THE STRUCTURE
400 OR STOICHIOMETRY. PRASEODYMIUM SEEMS TO BE PRESENT TO A SMALL EXTENT
400 IN THE 4+ STATE IN OXYGEN-EXCESS (NEGATIVE DELTA ) SAMPLES.
400 ORTHORHOMBIC PRBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA / SAMPLES SHOW THE
400 PRESENCE OF TWINS SUGGESTING THAT TWINS ARISE FROM ORTHORHOMBICITY
400 AND HAVE NO RELATION TO THE SUPERCONDUCTIVITY. A NEUTRON DIFFRACTION
400 STUDY OF A NEAR-STOICHIOMETRIC SAMPLE HAS SHOWN A DISORDERED
400 ORTHORHOMBIC STRUCTURE WITH 72% OCCUPANCY OF THE 01 (CHAIN) SITES AND
400 WITH NO INTERCHANGE BETWEEN PR AND BA SITES.
500 BARIUM COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 ELECTRICAL CONDUCTIVITY OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS;
500 NEUTRON DIFFRACTION EXAMINATION OF MATERIALS; PRASEODYMIUM COMPOUNDS;
500 SEMICONDUCTOR MATERIALS; TWINNING; VALENCY.
510 BOND LENGTHS; CRYSTAL STRUCTURE; NONSUPERCONDUCTOR; ELECTRICAL
510 CONDUCTIVITY; VALENCY SEMICONDUCTOR; TETRAGONAL STRUCTURE;
510 STOICHIOMETRY; TWINS; NEUTRON DIFFRACTION; DISORDERED ORTHORHOMBIC
510 STRUCTURE; PRBA/SUB 2/CU/SUB 3/O/SUB 7- DELTA /.
550 PRBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS PR/SS O/SS.
DOCUMENT= 1537
AUTH = ZOTOS
DT = 02
KN = B40891400681
LG = ENGL
SN = ISSN 0722-3277
YR = 89
000 3391910
002 B40891400681
010 JOURNAL PAPER; THEORETICAL.
100 QUANTUM MONTE CARLO STUDY OF A ONE DIMENSIONAL TWO BAND FERMION
100 MODEL.
200 ZOTOS, X.; LEHR, W. / WEBER, W.
220 INST. FUR THEORIE DER KONDENSIERTEN MATERIE, KARLSRUHE UNIV., WEST
220 GERMANY
310 Z. PHYS. B, CONDENS. MATTER (WEST GERMANY)
330 1989. VOL.74, NO.3, P.289-94, REF.20
350 ISSN 0722-3277, CODEN ZPCMDN
400 A QUANTUM MONTE CARLO INVESTIGATION OF A ONE-DIMENSIONAL TWO BAND
400 MODEL WITH STRONG CORRELATIONS IN ONE BAND IS PRESENTED. THIS TWO
400 BAND MODEL CAN BE CONSIDERED AS A ONE-DIMENSIONAL REALIZATION OF THE
400 HIGH T/SUB C/ CUPRATES. IN PARTICULAR, THE DENSITIES IN THE TWO
400 BANDS, THE FORMATION OF MAGNETIC MOMENTS AND THE SPIN-SPIN
400 CORRELATIONS ARE STUDIED AS A FUNCTION OF PARTICLE NUMBER. THE
400 QUANTUM MONTE CARLO RESULTS ARE COMPARED WITH A SIMPLE MEAN FIELD
400 THEORY DESCRIBING ANTIFERROMAGNETIC CORRELATIONS, A VARIATIONAL
400 GUTZWILLER TYPE CALCULATION AND A MAPPING TO AN EFFECTIVE ONE BAND
400 MODEL.
500 BAND THEORY MODELS AND CALCULATION METHODS; FERMION SYSTEMS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC MOMENTS; MONTE CARLO
500 METHODS; QUANTUM THEORY.
510 ONE DIMENSIONAL TWO BAND FERMION MODEL; QUANTUM MONTE CARLO
510 INVESTIGATION; STRONG CORRELATIONS; HIGH T/SUB C/ CUPRATES; MAGNETIC
510 MOMENTS; SPIN-SPIN CORRELATIONS; MEAN FIELD THEORY; ANTIFERROMAGNETIC
510 CORRELATIONS; VARIATIONAL GUTZWILLER TYPE CALCULATION; EFFECTIVE ONE
510 BAND MODEL.
DOCUMENT= 1538
AUTH = THEWALT
DT = 02
KN = B40891400791
LG = ENGL
SN = ISSN 0008-4204
YR = 88
000 3392020
002 B40891400791
010 JOURNAL PAPER; EXPERIMENTAL.
100 A HIGH AVERAGE-POWER QUASI-CONTINUOUS OPTICAL PARAMETRIC OSCILLATOR
100 SYSTEM.
200 THEWALT, M.L.W.; BECKETT, D.J.S.
220 DEPT. OF PHYS., SIMON FRASER UNIV., BURNABY, BC, CANADA
310 CAN. J. PHYS. (CANADA)
330 OCT. 1988. VOL.66, NO.10, P.868-70, REF.9
350 ISSN 0008-4204, CODEN CJPHAD
400 A QUASI-CONTINUOUS, WIDELY AND RAPIDLY TUNABLE OPTICAL PARAMETRIC
400 OSCILLATOR (OPO) WITH HIGH AVERAGE POWER IS DESCRIBED. A CU-VAPOUR
400 LASER PUMPED, TUNABLE DYE LASER HAS BEEN USED TO PUMP A LINBO/SUB 3/
400 OPO AT A REPETITION RATE OF 6 KHZ. RAPIDLY TUNABLE INFRARED RADIATION
400 IN THE RANGE OF 0.83-2.42 MU M HAS BEEN OBTAINED WITH AVERAGE POWERS
400 AS HIGH AS 136 MW IN THE SHORT-WAVELENGTH BRANCH OF THE OUTPUT.
500 LITHIUM COMPOUNDS; OPTICAL PARAMETRIC OSCILLATORS; OPTICAL PUMPING.
510 QUASI-CONTINUOUS OPTICAL PARAMETRIC OSCILLATOR SYSTEM; TUNABLE
510 OPTICAL PARAMETRIC OSCILLATOR; INFRARED RADIATION; 0.83 TO 2.42
510 MICRON; 136 MW; LINBO/SUB 3/; CU VAPOUR LASER.
550 CU/EL; LINBO3/SS NBO3/SS LI/SS NB/SS O3/SS O/SS.
560 WAVELENGTH 8.3 E-07 TO 2.42 E-06 M; POWER 1.36 E-01 W.
DOCUMENT= 1539
AUTH = TACHIBAN
DT = 02
KN = B40891400825
LG = ENGL
SN = ISSN 0009-2614
YR = 89
000 3392054
002 B40891400825
010 JOURNAL PAPER; THEORETICAL.
100 EXTENDED ORBITAL VIBRONIC CONSTANT AND ATTRACTIVE FORCE FOR
100 SUPERCONDUCTIVITY IN A MOLECULAR MODEL OF POLYACETYLENE.
200 TACHIBANA, A. / ISHIKAWA, S.; INOUE, T.; YAMABE, T.
220 DEPT. OF HYDROCARBON CHEM., FAC. OF ENG., KYOTO UNIV., JAPAN
310 CHEM. PHYS. LETT. (NETHERLANDS)
330 27 JAN. 1989. VOL.154, NO.4, P.403-7, REF.15
350 ISSN 0009-2614, CODEN CHPLBC
400 IT IS SHOWN THAT AN EXTENDED FORM OF THE ORBITAL VIBRONIC CONSTANT
400 (OVC) IN BERSUKER'S STUDY OF JAHN-TELLER EFFECTS (1984) IS RELATED TO
400 THE ATTRACTIVE FORCE FOR SUPERCONDUCTIVITY. 'EXTENDED' OVC (EOVC)
400 OBEYS CERTAIN SELECTION RULES. A PAIR OF ORBITALS FOR WHICH THE
400 OFF-DIAGONAL EOVC IS NONZERO SPECIFIES AN ELECTRON SCATTERING PROCESS
400 THROUGH WHICH THE ATTRACTIVE FORCE FOR SUPERCONDUCTIVITY IS CREATED.
400 THE EOVC IS CALCULATED NUMERICALLY BY AB INITIO QUANTUM CHEMICAL
400 METHODS FOR A MOLECULAR MODEL OF POLYACETYLENE. DEFORMATION OF THE
400 NUCLEAR GEOMETRY REDUCES THE ORBITAL ENERGY GAP FOR WHICH THE EOVC IS
400 NONZERO, AND ENHANCES THE ATTRACTIVE FORCE FOR SUPERCONDUCTIVITY.
500 CONDUCTING POLYMERS; JAHN-TELLER EFFECT; MOLECULAR VIBRATION IN
500 SOLIDS; MOLECULAR VIBRONIC STATES; SUPERCONDUCTING MATERIALS.
510 EXTENDED ORBITAL VIBRONIC CONSTANT; DEFORMATION; HIGH-T/SUB C/
510 SUPERCONDUCTIVITY; ATTRACTIVE FORCE; SUPERCONDUCTIVITY; MOLECULAR
510 MODEL; POLYACETYLENE; JAHN-TELLER EFFECTS; SELECTION RULES;
510 OFF-DIAGONAL; ELECTRON SCATTERING; ATTRACTIVE FORCE; AB INITIO
510 QUANTUM CHEMICAL METHODS; NUCLEAR GEOMETRY; ORBITAL ENERGY GAP.
DOCUMENT= 1540
AUTH = YONG
DT = 06
KN = B40891400952
LG = ENGL
SN = ISSN 0277-786X
YR = 88
000 3392181
002 B40891400952
010 CONFERENCE PAPER; EXPERIMENTAL.
100 MULTIPLE-PULSE LASER-INDUCED DAMAGE TO METAL MIRROR SURFACES.
200 YONG JEE; BECKER, M.F.; WALSER, R.M.
220 DEPT. OF ELECTR. ? COMPUT. ENG., TEXAS UNIV., AUSTIN, TX, USA
300 LASER OPTICS FOR INTRACAVITY AND EXTRACAVITY APPLICATIONS.
305 LOS ANGELES, CA, USA. 11-13 JAN. 1988. SPIE.
310 PROC. SPIE - INT. SOC. OPT. ENG. (USA)
330 1988. VOL.895, P.236-44, REF.18
350 ISSN 0277-786X, CODEN PSISDG
400 THE ACCUMULATION DEPENDENCE OF DAMAGE AND LASER INDUCED DAMAGE
400 MORPHOLOGIES ON SINGLE CRYSTAL METAL SURFACES HAVE BEEN OBSERVED
400 UNDER Q-SWITCHED 1064 NM ND:YAG LASER IRRADIATION AT 10 NSEC PULSES
400 AT 10 HZ RATE. SEVERAL DIFFERENT DAMAGE MORPHOLOGIES WERE OBSERVED:
400 SLIP-LINE FORMATION, RIPPLE PATTERNS, FLAT-MELTING, AND BOILING.
400 DAMAGE PROBABILITY VERSUS FLUENCE CURVES AND ACCUMULATION CURVES ARE
400 PLOTTED TO INVESTIGATE DAMAGE BEHAVIOR AS IT CORRELATES WITH
400 MORPHOLOGY. ACCUMULATION CURVES SHOWED DIFFERENT DAMAGE BEHAVIOR FOR
400 CRYSTALS OF DIFFERENT ORIENTATION. THRESHOLD DECREASE DUE TO
400 ACCUMULATION WAS THE LARGEST ON (111) CU AND AL SURFACES, WHICH ALSO
400 HAD THE LOWEST SINGLE SHOT DAMAGE THRESHOLD. THE THRESHOLD REDUCTION
400 IN ACCUMULATION FOLLOWS THE EQUATION F/SUB N/=F/SUB 1/N/SUP S-1/
400 WHERE F/SUB N/ IS THE N-PULSE DAMAGE THRESHOLD, N THE PULSE NUMBER,
400 AND S THE SLOPE OF THE ACCUMULATION CURVE. ACCUMULATION APPEARS TO BE
400 THE RESULT OF THE STORAGE CYCLE OF THERMAL STRESS-STRAIN ENERGY
400 INDUCED BY EACH LASER PULSE, AND MULTI-PULSE DAMAGE RESULTS FROM
400 PLASTIC SLIP AND FATIGUE.
500 LASER ACCESSORIES; LASER BEAM EFFECTS; MIRRORS.
510 MULTIPLE PULSE LASER INDUCED DAMAGE; (111) SURFACE; METAL MIRROR
510 SURFACES; ACCUMULATION DEPENDENCE; SINGLE CRYSTAL METAL SURFACES;
510 Q-SWITCHED 1064 NM ND:YAG LASER IRRADIATION; DAMAGE MORPHOLOGIES;
510 SLIP-LINE FORMATION; RIPPLE PATTERNS; FLAT-MELTING; BOILING; THERMAL
510 STRESS-STRAIN ENERGY; PLASTIC SLIP; FATIGUE; 1064 NM; 10 NS; CU; AL;
510 YAG:ND; YAL5O12:ND.
550 YAL5O12:ND/SS YAL5O12/SS AL5O12/SS AL5/SS O12/SS AL/SS ND/SS O/SS
550 Y/SS ND/EL ND/DOP; CU/SUR CU/EL; AL/SUR AL/EL.
560 WAVELENGTH 1.064 E-06 M; TIME 1.0 E-08 S.
DOCUMENT= 1541
AUTH = VARAPRAS
DT = 02
KN = B40891401170
LG = ENGL
SN = ISSN 0731-5171
YR = 88
000 3392399
002 B40891401170
010 JOURNAL PAPER; APPLICATIONS, PRACTICAL, EXPERIMENTAL.
100 123 OXIDE IN DOUBLE LAYER MICROWAVE ABSORBER.
200 VARAPRASAD, A.M.; PARAMESWARAN, S.
220 NAVAL CHEM. ? METALL. LAB., BOMBAY, INDIA
310 FERROELECTR. LETT. SECT. (UK)
330 1988. VOL.9, NO.5, P.123-30, REF.8
350 ISSN 0731-5171, CODEN FELEDJ
400 THE 123 OXIDE CONDUCTOR INCORPORATED WITH SHORT BRASS FIBERS WAS USED
400 AS THE ABSORBER MATRIX IN THE DOUBLE LAYER DESIGN OF THE MICROWAVE
400 ABSORBER PAINT. THE ABSORBER LAYER WAS COVERED WITH ANOTHER LAYER OF
400 TRANSFORMING PAINT THAT CONTAINS A FERRITE-RESIN MIXTURE FOR
400 EFFICIENT MICROWAVE ABSORPTION. ENHANCED MICROWAVE ABSORPTION OF
400 ABOUT 10-20 DB WAS OBSERVED WITH THE 123 OXIDE CONDUCTOR IN THE
400 ABSORBER MATRIX AT AMBIENT TEMPERATURE. THE ABSORPTION WAS ASCRIBED
400 TO THE POSSIBILITY OF A ROTATIONAL MODE ARISING OUT OF THE ROTATION
400 OF THE GROUP OF OCTAHEDRA SURROUNDING THE BARIUM SITE IN THE
400 PEROVSKITE LATTICE.
500 BARIUM COMPOUNDS; ELECTROMAGNETIC DEVICES; ELECTROMAGNETIC WAVE
500 ABSORPTION; FERRITES; HIGH-TEMPERATURE SUPERCONDUCTORS; SOFT MODES;
500 YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CERAMIC; SOFT MODES; LATTICE
510 VIBRATIONAL SPECTRA; DOUBLE LAYER MICROWAVE ABSORBER; 123 OXIDE
510 CONDUCTOR; SHORT BRASS FIBERS; DOUBLE LAYER DESIGN; MICROWAVE
510 ABSORBER PAINT; FERRITE-RESIN MIXTURE; ROTATIONAL MODE; PEROVSKITE
510 LATTICE; 8 TO 10 GHZ; YBA/SUB 2/CU/SUB 3/O/SUB 7-X/; YBA/SUB
510 1.6/LA/SUB 0.2/LI/SUB 0.2/CU/SUB 3/O/SUB 7-X/.
550 YBA2CU3O/INT BA2/INT CU3/INT BA/INT CU/INT O/INT Y/INT YBA2CU3O/SS
550 BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; YBA1.6LA0.2LI0.2CU3O/INT
550 BA1.6/INT LA0.2/INT LI0.2/INT CU3/INT BA/INT CU/INT LA/INT LI/INT
550 O/INT Y/INT YBA1.6LA0.2LI0.2CU3O/SS BA1.6/SS LA0.2/SS LI0.2/SS CU3/SS
550 BA/SS CU/SS LA/SS LI/SS O/SS Y/SS.
560 FREQUENCY 8.0 E+09 TO 1.0 E+10 HZ.
DOCUMENT= 1542
AUTH = BINTINGE
DT = 02
KN = B40891401275
LG = ENGL
SN = ISSN 0734-2101
YR = 89
000 3392504
002 B40891401275
010 JOURNAL PAPER; EXPERIMENTAL.
100 PHOTODESORPTION FROM COPPER-PLATED STAINLESS STEEL AT LIQUID-HELIUM
100 TEMPERATURE AND AT ROOM TEMPERATURE.
200 BINTINGER, D.; LIMON, P. / ROSENBERG, R.A.
220 LAWRENCE BERKELEY LAB., CA, USA
310 J. VAC. SCI. TECHNOL. A, VAC. SURF. FILMS (USA)
330 JAN.-FEB. 1989. VOL.7, NO.1, P.59-63, REF.7
350 ISSN 0734-2101, CODEN JVTAD6
400 PHOTODESORPTION YIELDS HAVE BEEN MEASURED FROM COPPER-PLATED
400 STAINLESS STEEL AT LIQUID-HELIUM TEMPERATURE AND AT ROOM TEMPERATURE
400 USING SYNCHROTRON RADIATION. THE COPPER-PLATED SURFACE IS A PROPOSED
400 INNER SURFACE FOR THE LIQUID-HELIUM TEMPERATURE BEAM PIPE OF THE
400 SUPERCONDUCTING SUPER COLLIDER (SSC). THE INNER SURFACE OF THE SSC
400 BEAM PIPE WILL BE ILLUMINATED BY SYNCHROTRON RADIATION FROM 20-TEV
400 PROTONS. THE NUMBER OF H/SUB 2/ MOLECULES DESORBED PER INCIDENT
400 PHOTON ( ETA (H/SUB 2/)) FROM THE LIQUID-HELIUM TEMPERATURE SURFACE
400 HAS BEEN MEASURED AS APPROXIMATELY 0.018 FOR AN ACCUMULATED PHOTON
400 DOSE OF 10/SUP 16/ PHOTONS/CM/SUP 2/ AND AS APPROXIMATELY 0.004 FOR
400 AN ACCUMULATED DOSE OF 10/SUP 18/ PHOTONS/CM/SUP 2/. THE RATIO OF ETA
400 (H/SUB 2/) FOR THE LIQUID-HELIUM TEMPERATURE SURFACE TO ETA (H/SUB
400 2/) FOR THE ROOM-TEMPERATURE SURFACE IS APPROXIMATELY 1.1 FOR AN
400 ACCUMULATED DOSE OF 10/SUP 16/ PHOTONS/CM/SUP 2/ AND IS APPROXIMATELY
400 2.0 FOR AN ACCUMULATED DOSE OF 10/SUP 18/ PHOTONS/CM/SUP 2/.
400 ESTIMATES OF ETA FOR H/SUB 2/O, CO, AND CO/SUB 2/ ARE ALSO GIVEN.
500 COPPER; DESORPTION; STAINLESS STEEL.
510 PHOTODESORPTION; BEAM PIPE; SUPERCONDUCTING SUPER COLLIDER;
510 SYNCHROTRON RADIATION; FECRC-CU.
550 FECRC-CU/INT FECRC/INT CR/INT CU/INT FE/INT C/INT FECRC/SS CR/SS
550 FE/SS C/SS CU/EL.
DOCUMENT= 1543
AUTH = RIOU
DT = 02
KN = B40891401305
LG = ENGL
SN = ISSN 0108-2701
YR = 89
000 3392534
002 B40891401305
010 JOURNAL PAPER; EXPERIMENTAL.
100 COPPER DISODIUM TETRAHYDROXIDE.
200 RIOU, A.; CUDENNEC, Y.; GERAULT, Y.
220 LAB. DE CHIMIE DES MATER. INORG ET DE CRISTALLOGR., RENNES, FRANCE
310 ACTA CRYSTALLOGR. C, CRYST. STRUCT. COMMUN. (DENMARK)
330 15 MARCH 1989. VOL.C45, PT.3, P.374-6, REF.4
350 ISSN 0108-2701, CODEN ACSCEE
400 CUNA/SUB 2/(OH)/SUB 4/, M/SUB R/=177.55, ORTHORHOMBIC, PNA2/SUB 1/,
400 A=6.750 (3), B=6.726 (5), C=8.993 (5) AA, V=408.3 (7) AA/SUP 3/, Z=4,
400 D/SUB X/=2.888 MG M/SUP -3/, MO K ALPHA , LAMBDA =0.71069 AA, MU
400 =5.442 MM/SUP -1/, F(000)=348, ROOM TEMPERATURE, R=0.030 FOR 549
400 REFLECTIONS. THE STRUCTURE CONTAINS (NAO/SUB 6/) OCTAHEDRA AND
400 (CUO)/SUB 4/ SQUARE PLANES. IT CAN BE DESCRIBED AS DERIVING FROM THE
400 NACL TYPE. 3/4 OF THE OCTAHEDRAL SITES FORMED BY O ATOMS ARE OCCUPIED
400 BY NA OR CU ATOMS, 1/4 BY H ATOMS. A STUDY OF THE HYDROGEN BONDS
400 SHOWS THAT THEY ARE VERY WEAK.
500 COPPER COMPOUNDS; CRYSTAL ATOMIC STRUCTURE OF INORGANIC COMPOUNDS;
500 HYDROGEN BONDS; SODIUM COMPOUNDS.
510 H BONDS; CRYSTAL STRUCTURE; ORTHORHOMBIC; (NAO/SUB 6/) OCTAHEDRA;
510 (CUO)/SUB 4/ SQUARE PLANES; HYDROGEN BONDS; CUNA/SUB 2/(OH)/SUB 4/.
550 CUNA2OH/SS NA2/SS CU/SS NA/SS OH/SS H/SS O/SS.
DOCUMENT= 1544
AUTH = KUBIKOVA
DT = 02
KN = B40891401425
LG = CZEC
SN = ISSN 0013-5798
YR = 89
000 3392654
002 B40891401425
010 JOURNAL PAPER; APPLICATIONS.
100 PERSPECTIVES OF HIGH TEMPERATURE SUPERCONDUCTORS IN POWER
100 ENGINEERING.
200 KUBIKOVA, M.
310 ELEKTROTECH. OBZ. (CZECHOSLOVAKIA)
330 JAN. 1989. VOL.78, NO.1, P.27-31, REF.28. (IN CZECH)
350 ISSN 0013-5798, CODEN EKOBAJ
400 THE AUTHOR SURVEYS THE STATE OF HIGH-TEMPERATURE SUPERCONDUCTOR
400 DEVELOPMENTS IN THE LATE 1980S AND CONSIDERS THE POSSIBLE
400 APPLICATIONS OF THESE MATERIALS IN THE FOLLOWING TYPES OF POWER
400 APPARATUS: ELECTRICAL MACHINES (POWER TRANSFORMERS; DC MACHINES; AC
400 GENERATORS AND MOTORS; SPECIAL-PURPOSE MOTORS); SWITCHING DEVICES;
400 POWER CABLES; AND MAGNETS. THE GREAT POTENTIAL PERSPECTIVES OF
400 HIGH-TEMPERATURE SUPERCONDUCTORS OPERATING AT NORMAL ROOM
400 TEMPERATURE, WITH OTHER PARAMETERS COMPARABLE TO CLASSICAL
400 SUPERCONDUCTORS, ARE POINTED OUT.
500 ELECTRIC MACHINES; HIGH-TEMPERATURE SUPERCONDUCTORS; POWER
500 TRANSFORMERS; SUPERCONDUCTING CABLES; SUPERCONDUCTING MAGNETS.
510 AC MOTORS; HIGH TEMPERATURE SUPERCONDUCTORS; POWER ENGINEERING;
510 ELECTRICAL MACHINES; POWER TRANSFORMERS; DC MACHINES; AC GENERATORS;
510 SPECIAL-PURPOSE MOTORS; SWITCHING DEVICES; POWER CABLES; MAGNETS.
DOCUMENT= 1545
AUTH = HROVAT
DT = 02
KN = B40891401779
LG = ENGL
SN = ISSN 0265-3028
YR = 89
000 3393008
002 B40891401779
010 JOURNAL PAPER; EXPERIMENTAL.
100 THICK FILM SUPERCONDUCTORS BASED ON BI/SUB 2/O/SUB 3/ MODIFIED
100 Y-BA-CU-O AND BI-SR-CA-CU-O SYSTEMS.
200 HROVAT, M.; BERNIK, S.; KOLAR, D.; JARKOVIC, I.
220 'JOSEF STEFAN' INST., 'E. KARDEKLJ' UNIV., LJUBLJANA, YUGOSLAVIA
310 HYBRID CIRCUITS (UK)
330 MAY 1989. NO.19, P.5-7,12, REF.14
350 ISSN 0265-3028, CODEN HYCRD5
400 A SUPERCONDUCTING MATERIAL WITH A COMPOSITION Y/SUB 1-X/BA/SUB
400 2/CU/SUB 3/O/SUB 7-3/2X/-X/2 BI/SUB 2/O/SUB 3/ (X=0.1 AND 0.2) WAS
400 SYNTHESISED. THE INFLUENCE OF BI/SUB 2/O/SUB 3/ ADDITIONS ON
400 SINTERING WAS STUDIED. PRELIMINARY INVESTIGATIONS OF THE
400 BI-SR-CA-CU-O SYSTEM WERE ALSO MADE. THICK FILM PASTES, PREPARED FROM
400 Y/SUB 1-X/BI/SUB X/BA/SUB 2/CU/SUB 3/O/SUB 7/ COMPOSITIONS, FROM THE
400 COMPOUND YBA/SUB 2/CU/SUB 3/O/SUB 7/ WITH 10 W/O ADDITION OF BI/SUB
400 2/CUO/SUB 4/ AND FROM TWO COMPOSITIONS IN THE BI-SR-CA-CU-O SYSTEM,
400 WERE FIRED ON AL/SUB 2/O/SUB 3/ AND ZRO/SUB 2/ SUBSTRATES. ALL THICK
400 FILM MATERIALS BASED ON YBA/SUB 2/CU/SUB 3/O/SUB 7/ COMPOUND WERE
400 SUPERCONDUCTING AT TEMPERATURES ABOVE 77 K WHEN FIRED ON ZRO/SUB 2/
400 SUBSTRATES, WHILE ONLY A MATERIAL WITH THE STARTING COMPOSITION Y/SUB
400 0.8/BA/SUB 2/CU/SUB 3/O/SUB 6.7/-0.1 BI/SUB 2/O/SUB 3/ REACHED ZERO
400 RESISTIVITY ABOVE 77 K ON AL/SUB 2/O/SUB 3/ SUBSTRATES. T/SUB C/
400 (ONSET) OF SAMPLES BASED ON THE YBA/SUB 2/CU/SUB 3/O/SUB 7/ COMPOUND
400 WAS AROUND 95 K, AND OF SAMPLES FROM THE BI-SR-CA-CU-O SYSTEM BETWEEN
400 95 AND 100 K.
500 BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CERAMICS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SINTERING; STRONTIUM COMPOUNDS;
500 THICK FILMS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; THICK FILM SUPERCONDUCTORS; BI/SUB
510 2/O/SUB 3/ ADDITIONS; SINTERING; 95 TO 100 K; BI-SR-CA-CU-O; ZRO/SUB
510 2/ SUBSTRATES; AL/SUB 2/O/SUB 3/ SUBSTRATES; Y-BA-BI-CU-O.
550 AL2O3/SUR AL2/SUR AL/SUR O3/SUR O/SUR AL2O3/BIN AL2/BIN AL/BIN O3/BIN
550 O/BIN; YBABICUO/SS BA/SS BI/SS CU/SS O/SS Y/SS; BISRCACUO/SS BI/SS
550 CA/SS CU/SS SR/SS O/SS; ZRO2/SUR O2/SUR ZR/SUR O/SUR ZRO2/BIN O2/BIN
550 ZR/BIN O/BIN.
560 TEMPERATURE 9.5 E+01 TO 1.0 E+02 K.
DOCUMENT= 1546
AUTH = CHOI
DT = 02
KN = B40891401780
LG = ENGL
SN = ISSN 0265-3028
YR = 89
000 3393009
002 B40891401780
010 JOURNAL PAPER; EXPERIMENTAL.
100 PROCESSING AND DIAGNOSTICS FOR THICK FILM SUPERCONDUCTORS PRODUCED
100 FROM Y-BA-CU-O MATERIALS.
200 CHOI, J.S.; BHALODIA, M.; SAMPH, S.; SNOWDEN, P.; YAHNER, P.; SCOLES,
200 K.J.
220 DEPT. OF ELECTR. ? COMPUT. ENG., DREXEL UNIV., PHILADELPHIA, PA, USA
310 HYBRID CIRCUITS (UK)
330 MAY 1989. NO.19, P.17-18, 22, REF.8
350 ISSN 0265-3028, CODEN HYCRD5
400 THICK FILM SUPERCONDUCTORS HAVE BEEN PRODUCED BY SCREEN PRINTING AND
400 ANNEALING PASTES MADE FROM OXIDE POWDERS AND PRE-ANNEALED POWDERS.
400 THESE FILMS HAVE BEEN ANALYSED BY X-RAY DIFFRACTION, MICROWAVE
400 ABSORPTION, RESISTANCE VS. TEMPERATURE MEASUREMENTS, AND ADHESION
400 TESTS. RESULTS SHOW THE CORRELATION BETWEEN STRUCTURAL AND ELECTRICAL
400 PROPERTIES.
500 ADHESION; ANNEALING; BARIUM COMPOUNDS; ELECTROMAGNETIC WAVE
500 ABSORPTION; HIGH-TEMPERATURE SUPERCONDUCTORS; THICK FILMS; X-RAY
500 DIFFRACTION EXAMINATION OF MATERIALS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; PROCESSING; STRUCTURAL PROPERTIES;
510 DIAGNOSTICS; THICK FILM SUPERCONDUCTORS; SCREEN PRINTING; ANNEALING;
510 X-RAY DIFFRACTION; MICROWAVE ABSORPTION; RESISTANCE; ADHESION TESTS;
510 ELECTRICAL PROPERTIES; Y-BA-CU-O.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1547
AUTH = MIYASHIR
DT = 02
KN = B40891401781
LG = ENGL
SN = ISSN 0265-3028
YR = 89
000 3393010
002 B40891401781
010 JOURNAL PAPER; APPLICATIONS, REVIEW, PRACTICAL.
100 THE POSSIBILITIES FOR APPLYING SUPERCONDUCTIVE CERAMICS TO HMT
100 (HYBRID MICROELECTRONICS TECHNOLOGY).
200 MIYASHIRO, F.
220 METALS ? CERAMICS LAB., R?D CENTER, TOSHIBA CORP., KAWASAKI, JAPAN
310 HYBRID CIRCUITS (UK)
330 MAY 1989. NO.19, P.19-22, REF.2
350 ISSN 0265-3028, CODEN HYCRD5
400 SUPERCONDUCTIVE CERAMICS, AT PRESENT, HAVE NOT YET GROWN INTO A
400 PRACTICAL MATERIAL FOR ACTUAL APPLICATION TO DEVICES AND SYSTEMS, BUT
400 ARE STILL IN THE RAW MATERIAL STAGE WITHIN THE RESEARCH LABORATORY.
400 THIS PAPER DISCUSSES SOME APPLICATION POSSIBILITIES IN JAPAN TO THE
400 HMT FIELD: LSI WIRING. TRANSISTORS, HYBRID ICS, AND PACKAGING, FROM
400 ELECTRICAL, PHYSICAL AND CHEMICAL ASPECTS, SUPPOSING THAT ONLY SUCH
400 SUPERCONDUCTIVE CERAMICS AS Y-BA-CU-O(YBCO) AND BI-SR-CA-CU-O(BSCCO)
400 UNDER LIQUID NITROGEN COOLING CAN BE USED.
500 CERAMICS; HIGH-TEMPERATURE SUPERCONDUCTORS; HYBRID INTEGRATED
500 CIRCUITS; PACKAGING; TRANSISTORS.
510 HIGH TEMPERATURE SUPERCONDUCTORS; HYBRID MICROELECTRONICS TECHNOLOGY;
510 SUPERCONDUCTIVE CERAMICS; APPLICATION POSSIBILITIES; LSI WIRING;
510 TRANSISTORS; HYBRID ICS; PACKAGING; YBACUO; BISRCACUO.
550 YBACUO/INT BA/INT CU/INT O/INT Y/INT YBACUO/SS BA/SS CU/SS O/SS Y/SS;
550 BISRCACUO/INT BI/INT CA/INT CU/INT SR/INT O/INT BISRCACUO/SS BI/SS
550 CA/SS CU/SS SR/SS O/SS.
DOCUMENT= 1548
AUTH = VOZILKIN
DT = 02
KN = B40891401863
LG = RUSS
SN = ISSN 0015-3230
YR = 89
000 3393092
002 B40891401863
010 JOURNAL PAPER; EXPERIMENTAL.
100 STRUCTURE AND SUPERCONDUCTING PROPERTIES OF TI-60% NB ALLOY WITH
100 ADMIXTURES OF COPPER.
200 VOZILKIN, V.A.; TRENOGINA, T.L.; VOLKOVA, S.B.; KORZHOV, V.P.
220 INST. OF METAL PHYS., ACAD. OF SCI., SVERDLOVSK, USSR
310 FIZ. MET. METALLOVED. (USSR)
330 FEB. 1989. VOL.67, NO.2, P.287-91, REF.9. (IN RUSSIAN)
331 ENGLISH TRANSLATION: PHYS. MET. METALLOGR. (UK). CODEN PHMMA6. ISSN
331 0031-918X
350 ISSN 0015-3230, CODEN FMMTAK
400 DIFFRACTION METHODS, HIGH-RESOLUTION TRANSMISSION ELECTRON
400 MICROSCOPY, AND X-RAY STRUCTURE ANALYSIS WERE USED IN A STUDY OF THE
400 STRUCTURE AND PHASE COMPOSITION OF TI-60% NB-(1-3)% CU ALLOYS. THE
400 ADDITION OF COPPER CAUSED PRECIPITATION OF A STABILIZED BETA -B.C.C.
400 SOLID SOLUTION, WHICH PRODUCED FINE ALPHA -PHASE PARTICLES.
400 MORPHOLOGICAL CHARACTERISTICS OF THE STRUCTURE AT VARIOUS STAGES OF
400 THIS PRECIPITATION PROCESS WERE STUDIED. CHANGES IN THE
400 MICROSTRUCTURE WERE COMPARED WITH CHANGES IN THE CRITICAL CURRENT
400 DENSITY J/SUB C/ AND IN THE CRITICAL TEMPERATURE T/SUB C/.
500 COPPER ALLOYS; CRITICAL CURRENT DENSITY (SUPERCONDUCTIVITY); CRYSTAL
500 MICROSTRUCTURE; NIOBIUM ALLOYS; PHASE EQUILIBRIUM; PRECIPITATION;
500 SUPERCONDUCTING TRANSITION TEMPERATURE; TITANIUM ALLOYS; TRANSMISSION
500 ELECTRON MICROSCOPE EXAMINATION OF MATERIALS; TYPE II
500 SUPERCONDUCTORS; X-RAY DIFFRACTION EXAMINATION OF MATERIALS.
510 STRUCTURE; MORPHOLOGICAL CHARACTERISTICS; STABILISED BETA BCC SOLID
510 SOLUTION; SUPERCONDUCTING PROPERTIES; HIGH-RESOLUTION TRANSMISSION
510 ELECTRON MICROSCOPY; X-RAY STRUCTURE ANALYSIS; PHASE COMPOSITION;
510 PRECIPITATION; FINE ALPHA -PHASE PARTICLES; MICROSTRUCTURE; CRITICAL
510 CURRENT DENSITY; CRITICAL TEMPERATURE; TI-NB-CU.
550 TINBCU/SS CU/SS NB/SS TI/SS.
DOCUMENT= 1549
AUTH = DMITRIEV
DT = 02
KN = B40891401895
LG = RUSS
SN = ISSN 0132-6414
YR = 89
000 3393124
002 B40891401895
010 JOURNAL PAPER; EXPERIMENTAL.
100 CURRENT-VOLTAGE CHARACTERISTICS AND ENERGY GAP IN HIGH-TEMPERATURE
100 YBACUO COMPOUNDS.
200 DMITRIEV, V.M.; SOLOV'EV, A.L.; DMITRENKO, A.I.
310 FIZ. NIZK. TEMP. (UKRAINIAN SSR)
330 1989. VOL.15, NO.4, P.356-62, REF.25. (IN RUSSIAN)
331 ENGLISH TRANSLATION: SOV. J. LOW TEMP. PHYS. (USA). CODEN SJLPDQ.
331 ISSN 0360-0335
350 ISSN 0132-6414, CODEN FNTEDK
400 POINT CONTACTS OF METALS (STEEL, NIOBIUM) WITH HIGH-TEMPERATURE
400 SUPERCONDUCTORS (HTSCS) YBACUO/SUB X/ ARE STUDIED IN THE TEMPERATURE
400 RANGE FROM LIQUID HELIUM TO T/SUB C/ APPROXIMATELY=70 K. BOTH THE
400 VALUE ( DELTA (0) APPROXIMATELY=17 MEV; 2 DELTA (0)/KT/SUB C/
400 APPROXIMATELY=5.5) AND THE TEMPERATURE DEPENDENCE OF ENERGY GAP IN
400 YBACUO/SUB X/ ARE OBTAINED WHICH ARE CONSISTENT WITH THE BCS THEORY
400 IN THE STRONG COUPLING LIMIT. WEAKLY TEMPERATURE-DEPENDENT PEAKS IN
400 DV/DI (V) CAN BE OBSERVED WHICH ARE INDICATIVE OF A STRONG
400 ELECTRON-PHONON INTERACTION IN HTSCS. THE EFFECTS DUE TO VARIATIONS
400 IN HTSC CONDUCTIVITY UNDER TRANSITION THROUGH T/SUB C/ ARE
400 CONSIDERED.
500 BARIUM COMPOUNDS; ELECTRON-PHONON INTERACTIONS; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; POINT CONTACTS; STRONG-COUPLING SUPERCONDUCTORS;
500 SUPERCONDUCTING ENERGY GAP; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CURRENT VOLTAGE CHARACTERISTICS;
510 POINT CONTACTS; ENERGY GAP; STEEL; TEMPERATURE DEPENDENCE; BCS
510 THEORY; STRONG COUPLING LIMIT; STRONG ELECTRON-PHONON INTERACTION;
510 4.2 TO 70 K; NB; YBACUO/SUB X/.
550 NB/INT NB/EL; FE/INT C/INT FE/SS C/SS; YBACUO/INT BA/INT CU/INT O/INT
550 Y/INT YBACUO/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 4.2 E+00 TO 7.0 E+01 K.
DOCUMENT= 1550
AUTH = POLUEKTO
DT = 02
KN = B40891401896
LG = RUSS
SN = ISSN 0132-6414
YR = 89
000 3393125
002 B40891401896
010 JOURNAL PAPER; THEORETICAL.
100 TWO-BAND MODEL OF HIGH-T/SUB C/ SUPERCONDUCTOR.
200 POLUEKTOV, YU.M.
310 FIZ. NIZK. TEMP. (UKRAINIAN SSR)
330 1989. VOL.15, NO.4, P.362-7, REF.14. (IN RUSSIAN)
331 ENGLISH TRANSLATION: SOV. J. LOW TEMP. PHYS. (USA). CODEN SJLPDQ.
331 ISSN 0360-0335
350 ISSN 0132-6414, CODEN FNTEDK
400 THE MODEL SUPERCONDUCTOR WITH TWO OVERLAPPING CONDUCTION BANDS IS
400 CONSIDERED FOR THE CASE WHEN THE PROCESSES OF INTERBAND SCATTERING
400 ARE OF PRINCIPAL IMPORTANCE. THE EFFECT OF BOTH THE ELECTRON-PHONON
400 ATTRACTION AND THE COULOMB REPULSION BETWEEN THE ELECTRONS BELONGING
400 TO DIFFERENT BANDS UPON THE CRITICAL TEMPERATURE IS TAKEN INTO
400 ACCOUNT. IT IS SHOWN THAT WITH THE DETERMINING ROLE OF THE COULOMB
400 INTERACTION THE CRITICAL TEMPERATURE MAY SIGNIFICANTLY EXCEED THE
400 CRITICAL TEMPERATURE POSSIBLE UNDER THE ELECTRON-PHONON INTERACTION.
500 ELECTRON-PHONON INTERACTIONS; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 SUPERCONDUCTING TRANSITION TEMPERATURE.
510 HIGH TEMPERATURE SUPERCONDUCTORS; TWO BAND MODEL; HIGH-T/SUB C/
510 SUPERCONDUCTOR; CONDUCTION BANDS; INTERBAND SCATTERING;
510 ELECTRON-PHONON ATTRACTION; COULOMB REPULSION; CRITICAL TEMPERATURE;
510 CRITICAL TEMPERATURE.
DOCUMENT= 1551
AUTH = PEDAN
DT = 02
KN = B40891401897
LG = RUSS
SN = ISSN 0132-6414
YR = 89
000 3393126
002 B40891401897
010 JOURNAL PAPER; THEORETICAL.
100 THEORY OF ELECTRON-EXCITON INTERACTION IN HIGH-TEMPERATURE
100 SUPERCONDUCTORS.
200 PEDAN, A.G.; KULIK, I.O.
310 FIZ. NIZK. TEMP. (UKRAINIAN SSR)
330 1989. VOL.15, NO.4, P.367-78, REF.46. (IN RUSSIAN)
331 ENGLISH TRANSLATION: SOV. J. LOW TEMP. PHYS. (USA). CODEN SJLPDQ.
331 ISSN 0360-0335
350 ISSN 0132-6414, CODEN FNTEDK
400 THE PAIRING OF TWO HOLES AT A QUASIMOLECULE CU/SUP 2+/ (O/SUP
400 2-/)/SUB 2/ IN AN OXYGEN-DEFICIENT CHAIN CUO/SUB 2/-O-CUO/SUB 2/-O .
400 . . OCCURRING IN HIGH-TEMPERATURE SUPERCONDUCTOR YBA/SUB 2/CU/SUB
400 3/O/SUB 7-X/ IS CONSIDERED. THE ORIGIN OF THE INTERACTION IS DUE TO
400 VIRTUAL EXCITONIC TRANSITION CU/SUP 2+/O/SUP 2-/ TO OR FROM CU/SUP
400 +/O/SUP -/ INVOLVING OF CHAIN O/SUB 2/ SPECIES. HIGH-T/SUB C/
400 SUPERCONDUCTIVITY EMERGES IN THE TWO COMPONENT SYSTEM COMPRISING
400 LOCAL PAIRS OF HOLES IN CUO CHAINS AND CONDUCTION ELECTRONS IN
400 CUO/SUB 2/ LAYERS.
500 BARIUM COMPOUNDS; EXCITONS; HIGH-TEMPERATURE SUPERCONDUCTORS; YTTRIUM
500 COMPOUNDS.
510 HOLE PAIRING; ELECTRON-EXCITON INTERACTION; HIGH-TEMPERATURE
510 SUPERCONDUCTORS; QUASIMOLECULE; VIRTUAL EXCITONIC TRANSITION; CUO
510 CHAINS; CONDUCTION ELECTRONS; CUO/SUB 2/ LAYERS; YBA/SUB 2/CU/SUB
510 3/O/SUB 7-X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
DOCUMENT= 1552
AUTH = MOSKALEN
DT = 02
KN = B40891401898
LG = RUSS
SN = ISSN 0132-6414
YR = 89
000 3393127
002 B40891401898
010 JOURNAL PAPER; THEORETICAL.
100 HIGH-TEMPERATURE SUPERCONDUCTIVITY IN TERMS OF THE TWO-BAND MODEL.
200 MOSKALENKO, V.A.; PALISTRANT, M.E.; VAKALYUK, V.M.
310 FIZ. NIZK. TEMP. (UKRAINIAN SSR)
330 1989. VOL.15, NO.4, P.378-83, REF.14. (IN RUSSIAN)
331 ENGLISH TRANSLATION: SOV. J. LOW TEMP. PHYS. (USA). CODEN SJLPDQ.
331 ISSN 0360-0335
350 ISSN 0132-6414, CODEN FNTEDK
400 AN ATTEMPT IS MADE TO EXPLAIN THERMODYNAMIC PROPERTIES OF
400 HIGH-TEMPERATURE SUPERCONDUCTORS ON THE BASIS OF THE TWO-BAND MODEL.
400 BY USING THE WEAK-BINDING APPROXIMATION, ONE MAY OBTAIN HIGH T/SUB
400 C/, SMALL VALUES OF A RELATIVE JUMP IN ELECTRON SPECIFIC HEAT, AND
400 RATIOS 2 DELTA /SUB 1//T/SUB C/>OR=3.5 AND 2 DELTA /SUB 2//T/SUB
400 C/<3.5 (OR <<3.5). THE THERMODYNAMIC CRITICAL FIELD IS FOUND TO
400 EXHIBIT AN ESSENTIALLY DIFFERENT BEHAVIOUR COMPARED TO THAT OF THE
400 BCS THEORY.
500 HIGH-TEMPERATURE SUPERCONDUCTORS; SPECIFIC HEAT OF SOLIDS;
500 SUPERCONDUCTING CRITICAL FIELD; THERMODYNAMIC PROPERTIES.
510 TWO-BAND MODEL; THERMODYNAMIC PROPERTIES; HIGH-TEMPERATURE
510 SUPERCONDUCTORS; WEAK-BINDING APPROXIMATION; ELECTRON SPECIFIC HEAT;
510 THERMODYNAMIC CRITICAL FIELD.
DOCUMENT= 1553
AUTH = ANTONOV
DT = 02
KN = B40891401899
LG = RUSS
SN = ISSN 0132-6414
YR = 89
000 3393128
002 B40891401899
010 JOURNAL PAPER; THEORETICAL, EXPERIMENTAL.
100 ELECTRONIC STRUCTURE AND X-RAY EMISSION SPECTRA OF LA/SUB 2-X/SR/SUB
100 X/CUO/SUB 4/.
200 ANTONOV, V.N.; ANTONOV, VL.N.; BAR'YAKHTAR, V.G.; BAGLYUK, A.I.;
200 ERESHCHENKO, A.A.; MAKSIMOV, E.G.; NEMOSHKALENKO, V.V.; PERLOV,
200 A.YA.; SAVRASOV, S.YU.; UVAROV, V.N.; USPENSKII, YU.A.
310 FIZ. NIZK. TEMP. (UKRAINIAN SSR)
330 1989. VOL.15, NO.4, P.389-96, REF.9. (IN RUSSIAN)
331 ENGLISH TRANSLATION: SOV. J. LOW TEMP. PHYS. (USA). CODEN SJLPDQ.
331 ISSN 0360-0335
350 ISSN 0132-6414, CODEN FNTEDK
400 THE X-RAY EMISSION SPECTRA OF THE ATOMS ENTERING INTO THE COMPOUND
400 LA/SUB 2-X/SR/SUB X/CUO ARE INVESTIGATED EXPERIMENTALLY. THE
400 RELATIVISTIC LMTO METHOD IS EMPLOYED TO CALCULATE THE ENERGY BAND
400 STRUCTURE, THE TOTAL AND PARTIAL DENSITIES OF STATES AND INTENSITY
400 DISTRIBUTION OVER THE X-RAY EMISSION LINES OF ALL TYPES OF ATOMS IN
400 LA/SUB 2-X/SR/SUB X/CUO/SUB 4/. THE THEORETICAL CALCULATION IS IN
400 GOOD AGREEMENT WITH THE EXPERIMENT.
500 BAND STRUCTURE OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS;
500 ELECTRONIC DENSITY OF STATES; HIGH-TEMPERATURE SUPERCONDUCTORS;
500 LANTHANUM COMPOUNDS; MUFFIN-TIN POTENTIAL; STRONTIUM COMPOUNDS; X-RAY
500 EMISSION SPECTRA.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ELECTRONIC STRUCTURE; X-RAY EMISSION
510 SPECTRA; RELATIVISTIC LMTO METHOD; ENERGY BAND STRUCTURE; DENSITIES
510 OF STATES; LA/SUB 2-X/SR/SUB X/CUO/SUB 4/.
550 LASRCUO4/SS CU/SS LA/SS O4/SS SR/SS O/SS.
DOCUMENT= 1554
AUTH = CLARK
DT = 02
KN = B40891402029
LG = ENGL
SN = ISSN 0168-9002
YR = 89
000 3393258
002 B40891402029
010 JOURNAL PAPER; EXPERIMENTAL.
100 ENERGY-DISPERSIVE POWDER DIFFRACTION AT THE SRS.
200 CLARK, S.M.
220 DARESBURY LAB., SERC, WARRINGTON, UK
310 NUCL. INSTRUM. METHODS PHYS. RES. A, ACCEL. SPECTROM. DETECT. ASSOC.
310 EQUIP. (NETHERLANDS)
330 15 MARCH 1989. VOL.A276, NO.1-2, P.381-7, REF.20
350 ISSN 0168-9002, CODEN NIMRD9
400 A NEW ENERGY-DISPERSIVE POWDER DIFFRACTION FACILITY HAS BEEN
400 CONSTRUCTED ON THE WIGGLER BEAM LINE OF THE SYNCHROTRON RADIATION
400 SOURCE (SRS) AT THE SCIENCE AND ENGINEERING RESEARCH COUNCIL'S
400 DARESBURY LABORATORY. THE PAPER DESCRIBES THE FACILITY, IN PARTICULAR
400 THE BEAM DEFINITION APPARATUS (FRONT END), THE DIFFRACTOMETER (BACK
400 END), AND THE COUNTING AND CONTROL ELECTRONICS. SOME RECENT RESULTS
400 ARE PRESENTED INCLUDING A HIGH PRESSURE STUDY OF LA/SUB 2/CUO/SUB 4/.
500 SYNCHROTRON RADIATION; X-RAY DIFFRACTOMETERS.
510 SRS; ENERGY-DISPERSIVE POWDER DIFFRACTION FACILITY; WIGGLER BEAM
510 LINE; SYNCHROTRON RADIATION SOURCE; BEAM DEFINITION APPARATUS; FRONT
510 END; DIFFRACTOMETER; BACK END; COUNTING; CONTROL ELECTRONICS; LA/SUB
510 2/CUO/SUB 4/.
550 LA2CUO4/SS LA2/SS CU/SS LA/SS O4/SS O/SS.
DOCUMENT= 1555
AUTH = TOULEMON
DT = 06
KN = B40891402079
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3393308
002 B40891402079
010 CONFERENCE PAPER; EXPERIMENTAL.
100 STRUCTURAL MODIFICATIONS INDUCED BY ELECTRONIC ENERGY DEPOSITION
100 DURING THE SLOWING DOWN OF HEAVY IONS IN MATTER.
200 TOULEMONDE, M.; BALANZAT, E.; BOUFFARD, S.; JOUSSET, J.C.
220 CIRIL, CAEN, FRANCE
300 6TH INTERNATIONAL CONFERENCE ON ION BEAM MODIFICATION OF MATERIALS
300 (IBMM '88).
305 TOKYO, JAPAN. 12-17 JUNE 1988.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 MARCH 1989. VOL.B39, NO.1-4, P.1-6, REF.35
350 ISSN 0168-583X, CODEN NIMBEU
400 THE DEFECTS OR THE PHASE TRANSFORMATIONS INDUCED BY HIGH DENSITY
400 ELECTRONIC EXCITATION ARE STUDIED IN THICK TARGETS. TWO KINDS OF
400 MATERIALS HAVE BEEN STUDIED: ELECTRICAL CONDUCTORS AND MAGNETIC
400 INSULATORS. THESE MATERIALS ARE INSENSITIVE TO INDIVIDUAL ELECTRONIC
400 EXCITATIONS SUCH AS THOSE CREATED BY PHOTON OR ELECTRON IRRADIATIONS.
400 IN AMORPHOUS METALLIC ALLOYS A TWO STEP PROCESS OF DAMAGE CREATION
400 HAS BEEN OBSERVED: DEFECT PRODUCTION FOLLOWED BY A CHANGE OF
400 DIMENSIONS OF THE SAMPLES. IN HIGH-T/SUB C/ SUPERCONDUCTORS LARGE
400 ELECTRONIC EXCITATIONS ENHANCE THE RATE OF DECREASE OF THE CRITICAL
400 TEMPERATURE EXCEPT IN LA/SUB 2/CUO/SUB 4/ WHERE T/SUB C/ INCREASES
400 UPON ION IRRADIATION. IN THE CASE OF MAGNETIC INSULATORS A
400 DESCRIPTION OF ION-INDUCED TRACKS IS PROPOSED WHICH ACCOUNTS FOR THE
400 EXPERIMENTAL DATA OVER THE WHOLE RANGE OF ELECTRONIC ENERGY LOSSES.
400 TWO RATES OF DAMAGE, CORRELATED WITH A CHANGE OF THE SHAPE OF INDUCED
400 DEFECTS, ARE SHOWN BY MOSSBAUER SPECTROSCOPY AND HIGH RESOLUTION
400 ELECTRON MICROSCOPY OBSERVATIONS.
500 ALLOYS; CRYSTAL DEFECTS; ELECTRON MICROSCOPE EXAMINATION OF
500 MATERIALS; ENERGY LOSS OF PARTICLES; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; ION BEAM EFFECTS; MOSSBAUER EFFECT; SUPERCONDUCTING
500 TRANSITION TEMPERATURE.
510 STRUCTURAL MODIFICATIONS; HEAVY ION SLOWING DOWN; ELECTRONIC ENERGY
510 DEPOSITION; DEFECTS; PHASE TRANSFORMATIONS; HIGH DENSITY ELECTRONIC
510 EXCITATION; THICK TARGETS; ELECTRICAL CONDUCTORS; MAGNETIC
510 INSULATORS; AMORPHOUS METALLIC ALLOYS; TWO STEP PROCESS; DAMAGE
510 CREATION; DEFECT PRODUCTION; HIGH-T/SUB C/ SUPERCONDUCTORS; CRITICAL
510 TEMPERATURE; ION-INDUCED TRACKS; ELECTRONIC ENERGY LOSSES; MOSSBAUER
510 SPECTROSCOPY; HIGH RESOLUTION ELECTRON MICROSCOPY; LA/SUB 2/CUO/SUB
510 4/.
550 LA2CUO4/SS LA2/SS CU/SS LA/SS O4/SS O/SS.
DOCUMENT= 1556
AUTH = TAGUCHI
DT = 06
KN = B40891402119
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3393348
002 B40891402119
010 CONFERENCE PAPER; EXPERIMENTAL.
100 CHARACTERIZATION OF SEMICONDUCTOR HETEROINTERFACE AND YBACUO
100 SUPERCONDUCTOR USING ION-BEAM INDUCED LUMINESCENCE METHOD.
200 TAGUCHI, T.; OTERA, H.; HIRAKI, A.
220 DEPT. OF ELECTR. ENG., FAC. OF ENG., OSAKA UNIV., JAPAN
300 6TH INTERNATIONAL CONFERENCE ON ION BEAM MODIFICATION OF MATERIALS
300 (IBMM '88).
305 TOKYO, JAPAN. 12-17 JUNE 1988.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 MARCH 1989. VOL.B39, NO.1-4, P.469-75, REF.12
350 ISSN 0168-583X, CODEN NIMBEU
400 THE ION-BEAM INDUCED LUMINESCENCE (IBIL) METHOD HAS BEEN USED TO
400 CHARACTERIZE THE HETEROINTERFACE PROPERTIES BETWEEN A ZNSE EPITAXIAL
400 LAYER AND GAAS SUBSTRATE, AND TO ANALYZE A MAJOR CONSTITUENT OF 90 K
400 YBACUO SUPERCONDUCTING CERAMICS. PROMINENT SHARP-ATOMIC LINES FROM
400 SPUTTERED ATOMS DURING 50 KEV AR/SUP +/ ION BOMBARDMENT CAN BE
400 OBSERVED IN THE SPECTRAL RANGE OF 200 TO 700 NM AT ROOM TEMPERATURE
400 OR AT 85 K USING A HIGHLY SENSITIVE PHOTON COUNTING SYSTEM. THE
400 INTERFACE WIDTH BETWEEN ZNSE AND GAAS IS DETERMINED TO BE ABOUT 400
400 AA BY DETECTING ZN I AND GA I ATOMIC LINES, WHICH IS COMPARABLE TO
400 THE RESULTS BY SIMS OR XPS MEASUREMENT. THE IBIL SPECTRUM OBSERVED IN
400 SUPERCONDUCTING YBACUO IS FOUND TO BE DIFFERENT FROM THAT OF
400 NONSUPERCONDUCTING SPECIES. IN PARTICULAR, THE RATIO OF CU ATOMIC
400 LINE INTENSITY TO THAT OF BA IN SUPERCONDUCTING SPECIES IS LARGER
400 THAN THAT IN NONSUPERCONDUCTING SPECIES, AND BECOMES MUCH MORE
400 PRONOUNCED AT 85 K.
500 BARIUM COMPOUNDS; CERAMICS; GALLIUM ARSENIDE; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; II-VI SEMICONDUCTORS; III-V SEMICONDUCTORS;
500 IONOLUMINESCENCE; LUMINESCENCE OF INORGANIC SOLIDS; SEMICONDUCTOR
500 EPITAXIAL LAYERS; SEMICONDUCTOR JUNCTIONS; YTTRIUM COMPOUNDS; ZINC
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; CHARACTERIZATION; SEMICONDUCTOR
510 HETEROINTERFACE; ION-BEAM INDUCED LUMINESCENCE METHOD; EPITAXIAL
510 LAYER; GAAS SUBSTRATE; SUPERCONDUCTING CERAMICS; SPUTTERED ATOMS;
510 AR/SUP +/ ION BOMBARDMENT; PHOTON COUNTING SYSTEM; CU ATOMIC LINE
510 INTENSITY; 50 KEV; 200 TO 700 NM; 85 K; YBACUO; ZNSE-GAAS; GAAS.
550 ZNSE-GAAS/INT GAAS/INT ZNSE/INT AS/INT GA/INT SE/INT ZN/INT GAAS/BIN
550 ZNSE/BIN AS/BIN GA/BIN SE/BIN ZN/BIN; GAAS/SUR AS/SUR GA/SUR GAAS/BIN
550 AS/BIN GA/BIN; YBACUO/SS BA/SS CU/SS O/SS Y/SS.
560 ELECTRON VOLT ENERGY 5.0 E+04 EV; WAVELENGTH 2.0 E-07 TO 7.0 E-07 M;
560 TEMPERATURE 8.5 E+01 K.
DOCUMENT= 1557
AUTH = MATSUI
DT = 06
KN = B40891402120
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3393349
002 B40891402120
010 CONFERENCE PAPER; EXPERIMENTAL.
100 HIGH-T/SUB C/ SUPERCONDUCTOR CHARACTERISTICS CONTROL BY ION
100 IMPLANTATION.
200 MATSUI, S.; MATSUTERA, H.; YOSHITAKE, T.; FUJITA, J.; SATOH, T.
220 NEC CORP., KAWASAKI, JAPAN
300 6TH INTERNATIONAL CONFERENCE ON ION BEAM MODIFICATION OF MATERIALS
300 (IBMM '88).
305 TOKYO, JAPAN. 12-17 JUNE 1988.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 MARCH 1989. VOL.B39, NO.1-4, P.635-9, REF.8
350 ISSN 0168-583X, CODEN NIMBEU
400 TRANSITION TEMPERATURE (T/SUB C/) CONTROL AND ANNEALING EFFECTS OF
400 YBA/SUB 2/CU/SUB 3/O/SUB X/ AND BI/SUB 2/SR/SUB 1.4/CA/SUB 1.8/CU/SUB
400 2.2/O/SUB Y/ SUPERCONDUCTOR THIN FILMS IMPLANTED BY 200 KEV NE/SUP +/
400 HAVE BEEN INVESTIGATED. YBA/SUB 2/CU/SUB 3/O/SUB X/ T/SUB C/ END
400 POINTS FOR 0, 1*10/SUP 14/, 1*10/SUP 15/ AND 1*10/SUP 16/ IONS/CM/SUP
400 2/ DOSES ARE 75, 71, 62 AND 16 K, RESPECTIVELY. ON THE OTHER HAND,
400 BI/SUB 2/SR/SUB 1.4/CA/SUB 1.8/CU/SUB 2.2/O/SUB Y/ T/SUB C/ END
400 POINTS FOR 0, 1*10/SUP 12/ AND 1*10/SUP 13/ IONS/CM/SUP 2/ DOSES ARE
400 78, 76 AND 54 K, RESPECTIVELY. C LATTICE CONSTANT INCREASES WERE
400 OBSERVED FOR THE IMPLANTED FILMS. IT IS CONFIRMED THAT THE
400 SUPERCONDUCTING CHARACTERISTICS FOR FILMS, ARE RECOVERED BY ANNEALING
400 IN O/SUB 2/ ATMOSPHERE. MOREOVER, MICROCRYSTAL GROWTH CAUSED BY
400 ANNEALING THE IMPLANTED YBA/SUB 2/CU/SUB 3/O/SUB X/ FILM WAS OBSERVED
400 ON THE SURFACE.
500 ANNEALING; BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS;
500 HIGH-TEMPERATURE SUPERCONDUCTORS; ION IMPLANTATION; STRONTIUM
500 COMPOUNDS; SUPERCONDUCTING THIN FILMS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; TRANSITION TEMPERATURE; ION
510 IMPLANTATION; ANNEALING EFFECTS; THIN FILMS; NE/SUP +/; LATTICE
510 CONSTANT; SUPERCONDUCTING CHARACTERISTICS; MICROCRYSTAL GROWTH; 200
510 KEV; YBA/SUB 2/CU/SUB 3/O/SUB X/; BI/SUB 2/SR/SUB 1.4/CA/SUB
510 1.8/CU/SUB 2.2/O/SUB Y/.
550 NE/SS NE/EL NE/DOP; YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS;
550 BI2SR1.4CA1.8CU2.2O/SS CA1.8/SS CU2.2/SS SR1.4/SS BI2/SS BI/SS CA/SS
550 CU/SS SR/SS O/SS.
560 ELECTRON VOLT ENERGY 2.0 E+05 EV.
DOCUMENT= 1558
AUTH = ERYU
DT = 06
KN = B40891402121
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3393350
002 B40891402121
010 CONFERENCE PAPER; EXPERIMENTAL.
100 FORMATION OF HIGH T/SUB C/ SUPERCONDUCTING FILMS BY LASER INDUCED
100 FRAGMENTS.
200 ERYU, O.; MURAKAMI, K.; TAKITA, K.; MASUDA, K.
220 INST. OF MATER. SCI., TSUKUBA UNIV., IBARAKI, JAPAN
300 6TH INTERNATIONAL CONFERENCE ON ION BEAM MODIFICATION OF MATERIALS
300 (IBMM '88).
305 TOKYO, JAPAN. 12-17 JUNE 1988.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 MARCH 1989. VOL.B39, NO.1-4, P.640-3, REF.11
350 ISSN 0168-583X, CODEN NIMBEU
400 FORMATION OF Y-BA-CU OXIDE FILMS BY PULSED-LASER SPUTTERING OF
400 SUPERCONDUCTING Y/SUB 1/BA/SUB 2/CU/SUB 3/O/SUB Y/ PELLETS AT 1.064
400 MU M WAS PERFORMED. AT LASER ENERGY DENSITIES FROM 0.6 TO 0.8
400 J/CM/SUP 2/, THE FILMS FORMED ON (100) MGO SUBSTRATE SHOWED
400 SUPERCONDUCTIVITY (T/SUB C/=81 K, T/SUB 0/=79 K) AND HIGHLY PREFERRED
400 ORIENTATION OF THE C-AXIS AFTER POST-ANNEALING. THE REGROWTH OF
400 AMORPHIZED HIGHLY IMPLANTED LAYERS OF THE SUPERCONDUCTING FILMS HAS
400 ALSO BEEN INVESTIGATED. FOR THE AMORPHOUS LAYER PRODUCED WITH
400 IMPLANTATION OF 120 KEV O/SUP +/ TO A DOSE OF 1*10/SUP 16//CM/SUP 2/,
400 BOTH THE SUPERCONDUCTIVITY AND PREFERRED ORIENTATION OF THE C-AXIS
400 WERE RECOVERED BY FURNACE ANNEALING IN FLOWING O/SUB 2/ GAS AT 900
400 AND 940 DEGREES C FOR 1 H. FOR ANNEALING AT 800 AND 850 DEGREES C, ON
400 THE OTHER HAND, THE AMORPHOUS LAYER IS RECRYSTALLIZED AND THE LAYER
400 HAS A NORMAL METALLIC CONDUCTANCE BUT NO PREFERENTIAL GROWTH. RESULTS
400 SUGGEST THAT SOLID PHASE EPITAXIAL REGROWTH OF O/SUP +/ ION-IMPLANTED
400 AMORPHOUS LAYER OCCURS ONLY AT TEMPERATURES HIGHER THAN A CRITICAL
400 TEMPERATURE BETWEEN 850 AND 900 DEGREES C.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; ION IMPLANTATION;
500 LASER BEAM EFFECTS; SOLID PHASE EPITAXIAL GROWTH; SPUTTERING;
500 SUPERCONDUCTING THIN FILMS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; HIGH T/SUB C/ SUPERCONDUCTING FILMS;
510 LASER INDUCED FRAGMENTS; PULSED-LASER SPUTTERING; HIGHLY PREFERRED
510 ORIENTATION; POST-ANNEALING; AMORPHIZED HIGHLY IMPLANTED LAYERS;
510 O/SUP +/; NORMAL METALLIC CONDUCTANCE; SOLID PHASE EPITAXIAL
510 REGROWTH; AMORPHOUS LAYER; 1.064 MICRON; 900 DEGC; 940 DEGC; 81 K;
510 850 TO 900 DEGC; 120 KEV; 800 DEGC; MGO SUBSTRATE; YBA/SUB 2/CU/SUB
510 3/O/SUB Y/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS; MGO/SUR MG/SUR O/SUR
550 MGO/BIN MG/BIN O/BIN.
560 WAVELENGTH 1.064 E-06 M; TEMPERATURE 1.17 E+03 K; TEMPERATURE 1.21
560 E+03 K; TEMPERATURE 8.1 E+01 K; TEMPERATURE 1.12 E+03 TO 1.17 E+03 K;
560 ELECTRON VOLT ENERGY 1.2 E+05 EV; TEMPERATURE 1.07 E+03 K.
DOCUMENT= 1559
AUTH = FUJITA
DT = 06
KN = B40891402122
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3393351
002 B40891402122
010 CONFERENCE PAPER; EXPERIMENTAL.
100 AS-GROWN EPITAXIAL Y-BA-CU-O FILMS PREPARED BY LOW ENERGY OXYGEN ION
100 ASSISTING ION BEAM SPUTTERING.
200 FUJITA, J.; YOSITAKE, T.; KAMIJYO, A.; SATOH, T.; IGARASHI, H.
220 FUNDAMENTAL RES. LABS., NEC CORP., KAWASAKI, JAPAN
300 6TH INTERNATIONAL CONFERENCE ON ION BEAM MODIFICATION OF MATERIALS
300 (IBMM '88).
305 TOKYO, JAPAN. 12-17 JUNE 1988.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 MARCH 1989. VOL.B39, NO.1-4, P.644-7, REF.9
350 ISSN 0168-583X, CODEN NIMBEU
400 THE AS-GROWN EPITAXIAL Y-BA-CU-O FILMS ON (100) AND (110) SRTIO/SUB
400 3/ SUBSTRATES WERE PREPARED BY ION BEAM SPUTTERING METHOD WITH LOW
400 ACCELERATING OXYGEN ION ASSIST. OXYGEN IONS WERE PRODUCED BY THE
400 KAUFMAN TYPE SINGLE GRID ION SOURCE WITH THE FILAMENT PROTECTION TO
400 OXYGEN. THE ORIENTATION OF EPITAXIAL FILMS ON (100) SRTIO/SUB 3/
400 SUBSTRATE WERE VARIED BY BOTH THE ASSISTING ION CURRENT DENSITY AND
400 SUBSTRATE TEMPERATURE; THE C-AXIS OF FILM TENDED TO BE NORMAL AT
400 HIGHER SUBSTRATE TEMPERATURE AND LOWER OXYGEN ION CURRENT, WHILE THE
400 C-AXIS OF THE FILMS TENDED TO LIE ON THE SUBSTRATE AT LOWER SUBSTRATE
400 TEMPERATURE AND HIGHER OXYGEN ION CURRENT. THE SAME TREND WAS
400 OBSERVED ON A (110)SRTIO/SUB 3/ SUBSTRATE; THE (110) ORIENTATION
400 FORMED AT LOWER SUBSTRATE TEMPERATURE AND HIGHER OXYGEN ION CURRENT,
400 IN CONTRAST (103) FORMED AT HIGHER SUBSTRATE TEMPERATURE AND LOWER
400 OXYGEN ION CURRENT.
500 BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; SPUTTER
500 DEPOSITION; SUPERCONDUCTING EPITAXIAL LAYERS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ION ASSISTING ION BEAM SPUTTERING;
510 KAUFMAN TYPE SINGLE GRID ION SOURCE; ORIENTATION; ION CURRENT
510 DENSITY; SUBSTRATE TEMPERATURE; EPITAXIAL Y-BA-CU-O FILMS; SRTIO/SUB
510 3/ SUBSTRATE.
550 YBACUO/SS BA/SS CU/SS O/SS Y/SS; SRTIO3/SUR TIO3/SUR O3/SUR SR/SUR
550 TI/SUR O/SUR SRTIO3/SS TIO3/SS O3/SS SR/SS TI/SS O/SS.
DOCUMENT= 1560
AUTH = MEYER
DT = 06
KN = B40891402123
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3393352
002 B40891402123
010 CONFERENCE PAPER; EXPERIMENTAL.
100 ION BEAM MODIFICATION AND ANALYSIS OF SINGLE CRYSTALLINE YBA/SUB
100 2/CU/SUB 3/O/SUB 7/ THIN FILMS.
200 MEYER, O.; EGNER, B.; XIONG, G.C.; XI, X.X.; LINKER, G.; GEERK, J.
220 KERNFORSCHUNGSZENTRUM KARLSRUHE, INST. FUR NUKLEARE FESTKORPERPHYS.,
220 KARLSRUHE, WEST GERMANY
300 6TH INTERNATIONAL CONFERENCE ON ION BEAM MODIFICATION OF MATERIALS
300 (IBMM '88).
305 TOKYO, JAPAN. 12-17 JUNE 1988.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 MARCH 1989. VOL.B39, NO.1-4, P.628-34, REF.25
350 ISSN 0168-583X, CODEN NIMBEU
400 IRRADIATION OF THIN YBA/SUB 2/CU/SUB 3/O/SUB 7/ FILMS WITH PROTONS,
400 HE- AND AR-IONS AT 5 AND 77 K CAUSES DISTINCT CHANGES OF THE
400 RESISTIVITY, THE TRANSITION TEMPERATURE TO SUPERCONDUCTIVITY, THE
400 WIDTH OF THIS TRANSITION AND OF THE STRUCTURE OF THE FILMS. THE
400 RESULTS DEPEND IN A CHARACTERISTIC WAY ON THE INITIAL TRANSPORT
400 PROPERTIES AND THE GRAIN STRUCTURE OF THE FILMS. ABOUT 60% OF THE
400 IRRADIATION INDUCED CHANGES RECOVER DURING ANNEALING TO 296 K. WITH
400 INCREASING FLUENCE FIRST A SEMICONDUCTING AND THEN AN AMORPHOUS PHASE
400 DEVELOPED. HE-ION CHANNELING TOGETHER WITH THE ENHANCED SCATTERING
400 CROSS SECTION FOR HE ON OXYGEN AT 3.04 MEV WAS APPLIED TO STUDY THE
400 DAMAGE PRODUCTION AND ANNEALING IN ION IRRADIATED SINGLE CRYSTALLINE
400 YBA/SUB 2/CU/SUB 3/O/SUB 7/ THIN FILMS.
500 BARIUM COMPOUNDS; CHANNELLING; HIGH-TEMPERATURE SUPERCONDUCTORS; ION
500 BEAM EFFECTS; SUPERCONDUCTING THIN FILMS; SUPERCONDUCTING TRANSITION
500 TEMPERATURE; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ION BEAM MODIFICATION;
510 SEMICONDUCTING PHASE; SINGLE CRYSTAL; HE ION IRRADIATED; PROTON
510 IRRADIATED; AR ION IRRADIATED; ANALYSIS; THIN FILMS; RESISTIVITY;
510 TRANSITION TEMPERATURE; STRUCTURE; TRANSPORT PROPERTIES; GRAIN
510 STRUCTURE; ANNEALING; AMORPHOUS PHASE; HE-ION CHANNELING; ENHANCED
510 SCATTERING CROSS SECTION; 5 K; 77 K; YBA/SUB 2/CU/SUB 3/O/SUB 7/.
550 YBA2CU3O7/SS BA2/SS CU3/SS BA/SS CU/SS O7/SS O/SS Y/SS.
560 TEMPERATURE 5.0 E+00 K; TEMPERATURE 7.7 E+01 K.
DOCUMENT= 1561
AUTH = RAUSCHEN
DT = 06
KN = B40891402124
LG = ENGL
SN = ISSN 0168-583X
YR = 89
000 3393353
002 B40891402124
010 CONFERENCE PAPER; EXPERIMENTAL.
100 PREPARATION OF THIN SUPERCONDUCTING Y-BA-CU OXIDE FILMS BY ION BEAM
100 MIXING.
200 RAUSCHENBACH, B.; HOHMUTH, K.
220 ACAD. OF SCI., CENTRAL INST. FOR NUCL. RES. ROSSENDORF, DRESDEN, EAST
220 GERMANY
300 6TH INTERNATIONAL CONFERENCE ON ION BEAM MODIFICATION OF MATERIALS
300 (IBMM '88).
305 TOKYO, JAPAN. 12-17 JUNE 1988.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 MARCH 1989. VOL.B39, NO.1-4, P.648-51, REF.10
350 ISSN 0168-583X, CODEN NIMBEU
400 POLYCRYSTALLINE SUPERCONDUCTING THIN FILMS OF Y-BA-CU OXIDES HAVE
400 BEEN PREPARED BY VAPOUR DEPOSITION OF ALTERNATE LAYERS, OXYGEN OR
400 XENON ION BEAM INDUCED MIXING AND SHORT-TIME POST-ANNEALING AT
400 TEMPERATURES UP TO 800 DEGREES C. THE MIXED MULTILAYERS HAVE BEEN
400 CHARACTERIZED BY SCANNING ELECTRON MICROSCOPY, ENERGY DISPERSIVE
400 X-RAY ANALYSIS, HIGH-VOLTAGE ELECTRON MICROSCOPY, AND MEASUREMENTS OF
400 THE RESISTANCE. THE SAMPLES WERE COMPLETELY SUPERCONDUCTING BETWEEN
400 79 AND 82 K.
500 ANNEALING; BARIUM COMPOUNDS; ELECTRON MICROSCOPE EXAMINATION OF
500 MATERIALS; HIGH-TEMPERATURE SUPERCONDUCTORS; ION BEAM MIXING;
500 SCANNING ELECTRON MICROSCOPE EXAMINATION OF MATERIALS;
500 SUPERCONDUCTING THIN FILMS; X-RAY DIFFRACTION EXAMINATION OF
500 MATERIALS; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; PREPARATION; THIN FILMS; ION BEAM
510 MIXING; VAPOUR DEPOSITION; POST-ANNEALING; MIXED MULTILAYERS;
510 SCANNING ELECTRON MICROSCOPY; ENERGY DISPERSIVE X-RAY ANALYSIS;
510 HIGH-VOLTAGE ELECTRON MICROSCOPY; RESISTANCE; 79 TO 82 K; 800 DEGC.
560 TEMPERATURE 7.9 E+01 TO 8.2 E+01 K; TEMPERATURE 1.07 E+03 K.
DOCUMENT= 1562
AUTH = MCCALLUM
DT = 06
KN = B40891402125
LG = ENGL
SN = ISSN 0168-583X
YR = 88
000 3393354
002 B40891402125
010 CONFERENCE PAPER; EXPERIMENTAL.
100 THE ANNEALING BEHAVIOR OF ION-IMPLANTED SINGLE CRYSTALS OF THE TYPE
100 YBA/SUB 2/CU/SUB 3/O/SUB X/.
200 MCCALLUM, J.C.; WHITE, C.W.; BOATNER, L.A.
220 DIV. OF SOLID STATE, OAK RIDGE NAT. LAB., TN, USA
300 TENTH INTERNATIONAL CONFERENCE ON THE APPLICATION OF ACCELERATORS IN
300 RESEARCH AND INDUSTRY.
305 DENTON, TX, USA. 7-9 NOV. 1988.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 APRIL 1988. VOL.B40-41, PT.1, P.608-11, REF.14
350 ISSN 0168-583X, CODEN NIMBEU
400 RECENT MEASUREMENTS HAVE SHOWN THAT THE STRUCTURAL DISORDER INDUCED
400 BY THE IMPLANTATION OF IONS INTO HIGH-T/SUB C/ SUPERCONDUCTING OXIDES
400 OF THE TYPE YBA/SUB 2/CU/SUB 3/O/SUB X/ CAN LEAD TO SIGNIFICANT
400 DECOMPOSITION OF THE IMPLANTED REGION DURING SUBSEQUENT THERMAL
400 PROCESSING. THE AUTHORS HAVE USED RUTHERFORD BACKSCATTERING
400 SPECTROMETRY AND ION CHANNELING TO EXAMINE THE EFFECTS OF ION
400 IMPLANTATION AND THERMAL ANNEALING ON THE NEAR-SURFACE COMPOSITION OF
400 THESE MATERIALS. THEIR RESULTS INDICATE THAT THE DECOMPOSITION OF THE
400 IMPLANTED REGION OF YBA/SUB 2/CU/SUB 3/O/SUB X/ SINGLE CRYSTALS IS
400 ASSOCIATED WITH BA MIGRATION AND OCCURS FOR ION DOSES ABOVE A
400 DEFINITE THRESHOLD WHEN THERMAL ANNEALS ARE CARRIED OUT AT
400 TEMPERATURES GREATER THAN 500 DEGREES C IN A VARIETY OF ATMOSPHERES
400 (O/SUB 2/, O/SUB 2/+H/SUB 2/O, AR). IMPORTANTLY, THEY HAVE ALSO
400 OBSERVED THAT THE IMPLANTED CRYSTALS CAN BE ANNEALED IN O/SUB 2/ AT A
400 TEMPERATURE OF 850 DEGREES C WITH LITTLE DECOMPOSITION OF THE
400 IMPLANTED REGION OCCURRING AND THAT, UNDER THESE CONDITIONS, THE
400 IMPLANTATION-INDUCED DISORDER IS SUBSTANTIALLY REMOVED.
500 ANNEALING; BARIUM COMPOUNDS; CHANNELLING; HIGH-TEMPERATURE
500 SUPERCONDUCTORS; ION IMPLANTATION; RUTHERFORD BACKSCATTERING; YTTRIUM
500 COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ANNEALING BEHAVIOR; ION-IMPLANTED
510 SINGLE CRYSTALS; STRUCTURAL DISORDER; HIGH-T/SUB C/ SUPERCONDUCTING
510 OXIDES; DECOMPOSITION; THERMAL PROCESSING; RUTHERFORD BACKSCATTERING
510 SPECTROMETRY; ION CHANNELING; NEAR-SURFACE COMPOSITION; BA MIGRATION;
510 IMPLANTATION-INDUCED DISORDER; 500 DEGC; 850 DEGC; YBA/SUB 2/CU/SUB
510 3/O/SUB X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 7.73 E+02 K; TEMPERATURE 1.12 E+03 K.
DOCUMENT= 1563
AUTH = MARWICK
DT = 06
KN = B40891402126
LG = ENGL
SN = ISSN 0168-583X
YR = 88
000 3393355
002 B40891402126
010 CONFERENCE PAPER; EXPERIMENTAL.
100 ANNEALING OF ION IMPLANT DAMAGE IN THE HIGH-TEMPERATURE
100 SUPERCONDUCTOR YBA/SUB 2/CU/SUB 3/O/SUB 7-X/.
200 MARWICK, A.D.; CLARK, G.J.; TU, K.N.; YEE, D.S.; LEE, C.; SINGH,
200 U.N.; DOYLE, J.; CUOMO, J.J.
220 THOMAS J. WATSON RES. LAB., YORKTOWN HEIGHTS, NY, USA
300 TENTH INTERNATIONAL CONFERENCE ON THE APPLICATION OF ACCELERATORS IN
300 RESEARCH AND INDUSTRY.
305 DENTON, TX, USA. 7-9 NOV. 1988.
310 NUCL. INSTRUM. METHODS PHYS. RES. B, BEAM INTERACT. MATER. AT.
310 (NETHERLANDS)
330 APRIL 1988. VOL.B40-41, PT.1, P.612-14, REF.18
350 ISSN 0168-583X, CODEN NIMBEU
400 IT WAS FOUND THAT THE INCREASE IN ROOM-TEMPERATURE RESISTIVITY CAUSED
400 BY ION BOMBARDMENT DAMAGE IN YBA/SUB 2/CU/SUB 3/O/SUB 7-X/ COULD BE
400 COMPLETELY RECOVERED BY ANNEALING IF THE DAMAGE DOSE WAS SMALL. A
400 SMALL RESISTIVITY INCREMENT ( APPROXIMATELY 0.2%), CAUSED BY A VERY
400 SMALL ION DOSE, ANNEALED AT ROOM TEMPERATURE. FOR A LARGER ION DOSE,
400 SUFFICIENT TO DOUBLE THE RESISTIVITY, COMPLETE RECOVERY OF
400 ROOM-TEMPERATURE RESISTIVITY WAS PRODUCED BY ANNEALING AT 500 DEGREES
400 C IN O/SUB 2/, BUT RECOVERY AFTER STILL LARGER DOSES WAS INCOMPLETE.
500 ANNEALING; BARIUM COMPOUNDS; HIGH-TEMPERATURE SUPERCONDUCTORS; ION
500 BEAM EFFECTS; ION IMPLANTATION; RECOVERY; YTTRIUM COMPOUNDS.
510 HIGH TEMPERATURE SUPERCONDUCTOR; ION IMPLANT DAMAGE; ROOM-TEMPERATURE
510 RESISTIVITY; ION BOMBARDMENT DAMAGE; RECOVERED; ANNEALING; 500 DEGC;
510 YBA/SUB 2/CU/SUB 3/O/SUB 7-X/.
550 YBA2CU3O/SS BA2/SS CU3/SS BA/SS CU/SS O/SS Y/SS.
560 TEMPERATURE 7.73 E+02 K.