PRECISION-MEASUREMENT OF MAGNETIC-RELAXATION IN YBA2CU3O7 - POWER-LAW VERSUS LOGARITHMIC DECAY

被引：30

作者：

BRAWNER, DA ^{[1
]}

ONG, NP ^{[1
]}

WANG, ZZ ^{[1
]}

机构：

[1] CNRS,LAB 2M,F-92220 BAGNEUX,FRANCE

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.47.1156

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a sensitive, micrometer-sized, scanning Hall probe, we have made precision measurements of the relaxation of the remanent magnetization in single crystal YBa2Cu3O7. The technique allows us to determine how the relaxation rate varies over the face of the crystal. At all temperatures from 4.2 to 74 K, the relaxation is observed to follow a power-law dependence B is similar to (1 + t/tau)-1/sigma instead of logarithmic behavior. We discuss the origin of tau, and compare the relaxation behavior with recent calculations of vortex diffusion.

引用

页码：1156 / 1159

页数：4

共 22 条

[1] HARD SUPERCONDUCTIVITY - THEORY OF MOTION OF ABRIKOSOV FLUX LINES
ANDERSON, PW
KIM, YB
[J]. REVIEWS OF MODERN PHYSICS, 1964, 36 (1P1) : 39 - &
[2] FLUX CREEP IN TYPE-2 SUPERCONDUCTORS
BEASLEY, MR
LABUSCH, R
WEBB, WW
[J]. PHYSICAL REVIEW, 1969, 181 (02): : 682 - &
[3] NOVEL FIELD-INDUCED ASYMMETRY IN THE REMANENT MAGNETIZATION OF THE SUPERCONDUCTOR YBA2CU3O7
BRAWNER, DA
ONG, NP
WANG, ZZ
[J]. NATURE, 1992, 358 (6387) : 567 - 569
[4] BRAWNER DA, IN PRESS J APPL PHYS
[5] FLUX CREEP AND CURRENT RELAXATION IN HIGH-TC SUPERCONDUCTORS
FEIGELMAN, MV
GESHKENBEIN, VB
VINOKUR, VM
[J]. PHYSICAL REVIEW B, 1991, 43 (07): : 6263 - 6265
[6] THERMAL FLUCTUATIONS, QUENCHED DISORDER, PHASE-TRANSITIONS, AND TRANSPORT IN TYPE-II SUPERCONDUCTORS
FISHER, DS
FISHER, MPA
HUSE, DA
[J]. PHYSICAL REVIEW B, 1991, 43 (01): : 130 - 159
[7] LOW-TEMPERATURE MAGNETIC-RELAXATION IN YBA2CU3O7-DELTA - EVIDENCE FOR QUANTUM TUNNELING OF VORTICES
FRUCHTER, L
MALOZEMOFF, AP
CAMPBELL, IA
SANCHEZ, J
KONCZYKOWSKI, M
GRIESSEN, R
HOLTZBERG, F
[J]. PHYSICAL REVIEW B, 1991, 43 (10): : 8709 - 8712
[8] THE GIANT SHORT-TIME DECAY OF PERSISTENT CURRENTS IN Y1BA2CU3O7-DELTA AT 77-K
GAO, L
XUE, YY
HOR, PH
CHU, CW
[J]. PHYSICA C, 1991, 177 (4-6): : 438 - 444
[9] TRANSIENT REGIMES OF FLUX CREEP IN HIGH-TC SUPERCONDUCTORS
GUREVICH, A
KUPFER, H
RUNTSCH, B
MEIERHIRMER, R
LEE, D
SALAMA, K
[J]. PHYSICAL REVIEW B, 1991, 44 (21): : 12090 - 12093
[10] 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

← 1 2 3 →