LOCAL MAGNETIC-RELAXATION IN HIGH-TEMPERATURE SUPERCONDUCTORS

被引：98

作者：

ABULAFIA, Y

SHAULOV, A

WOLFUS, Y

PROZOROV, R

BURLACHKOV, L

YESHURUN, Y

MAJER, D

ZELDOV, E

VINOKUR, VM

机构：

[1] WEIZMANN INST SCI, DEPT CONDENSED MATTER PHYS, IL-76100 REHOVOT, ISRAEL

[2] ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.75.2404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A novel Hall probe array technique is used to measure the spatial distribution and time dependence of the magnetic induction in YBa2Cu3O7-delta crystals. Analysis of the data based on the flux diffusion equation allows a direct, model-independent determination of the local activation energy U and the logarithmic time scale to for flux creep. The results indicate that the spatial variations of U are small (+/-kT) and that U increases logarithmically with time. The time t(0) is inversely proportional to the field and it exhibits a nonmonotonic temperature dependence. These results confirm theoretical predictions based on the logarithmic solution of the flux diffusion equation.

引用

页码：2404 / 2407

页数：4

共 22 条

[11] GESHKENBEIN VB, 1989, ZH EKSP TEOR FIZ, V68, P639
[12] RELATIONSHIP BETWEEN CRYSTAL-GROWTH AND PHYSICAL-PROPERTIES IN THE HIGH-TEMPERATURE SUPERCONDUCTOR YBA2CU3O7-DELTA
HOLTZBERG, F
FEILD, C
[J]. JOURNAL OF CRYSTAL GROWTH, 1990, 99 (1-4) : 915 - 921
[13] DYNAMICS OF INTERFACES AND DISLOCATIONS IN DISORDERED MEDIA
IOFFE, LB
VINOKUR, VM
[J]. JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1987, 20 (36): : 6149 - 6158
[14] MAGNETIC-RELAXATION CLOSE TO TC IN YBA2CU3O7 CRYSTAL
KONCZYKOWSKI, M
MALOZEMOFF, AP
HOLTZBERG, F
[J]. PHYSICA C, 1991, 185 : 2203 - 2204
[15] DEPENDENCE OF FLUX-CREEP ACTIVATION-ENERGY UPON CURRENT-DENSITY IN GRAIN-ALIGNED YBA2CU3O7-X
MALEY, MP
WILLIS, JO
LESSURE, H
MCHENRY, ME
[J]. PHYSICAL REVIEW B, 1990, 42 (04): : 2639 - 2642
[16] FLUX-PENETRATION AND OVERCRITICAL CURRENTS IN FLAT SUPERCONDUCTORS WITH IRRADIATION-ENHANCED EDGE PINNING - THEORY AND EXPERIMENT
SCHUSTER, T
INDENBOM, MV
KUHN, H
BRANDT, EH
KONCZYKOWSKI, M
[J]. PHYSICAL REVIEW LETTERS, 1994, 73 (10) : 1424 - 1427
[17] LONG-TERM NONLOGARITHMIC MAGNETIC-RELAXATION IN SINGLE-CRYSTAL YBA2CU3O7 SUPERCONDUCTORS
THOMPSON, JR
SUN, YR
HOLTZBERG, F
[J]. PHYSICAL REVIEW B, 1991, 44 (01): : 458 - 461
[18] NONLINEAR CURRENT DIFFUSION IN TYPE-II SUPERCONDUCTORS
VANDERBEEK, CJ
NIEUWENHUYS, GJ
KES, PH
SCHNACK, HG
GRIESSEN, R
[J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1992, 197 (3-4): : 320 - 336
[19] ZELDOV E, 1994, PHYS REV B, V49, P9802, DOI 10.1103/PhysRevB.49.9802
[20] FLUX CREEP CHARACTERISTICS IN HIGH-TEMPERATURE SUPERCONDUCTORS
ZELDOV, E
AMER, NM
KOREN, G
GUPTA, A
MCELFRESH, MW
GAMBINO, RJ
[J]. APPLIED PHYSICS LETTERS, 1990, 56 (07) : 680 - 682

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