OBSERVED REGIMES OF COLLECTIVE FLUX-CREEP IN PROTON-IRRADIATED, SINGLE-CRYSTAL Y-BA-CU-O - DEPENDENCE ON CURRENT-DENSITY

被引：37
|
作者：
THOMPSON, JR
SUN, YR
CHRISTEN, DK
CIVALE, L
MARWICK, AD
HOLTZBERG, F
机构：
[1] UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996
[2] IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598
来源：
PHYSICAL REVIEW B | 1994年 / 49卷 / 18期
关键词：
D O I：
10.1103/PhysRevB.49.13287
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Flux-creep studies have quantified the time decay of supercurrents in a proton-irradiated YBa2Cu3O7 crystal. We determine the dependence of the characteristic exponent mu (which governs current decay) on current density and magnetic field. The results are compared with collective-creep theory for the case of random pointlike disorder. Observed are predicted regimes of creep with small and large bundles of vortices, indications of single vortex motion, and other consistencies.
引用
收藏
页码：13287 / 13290
页数：4
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