EVIDENCE FOR MEAN FREE-PATH FLUCTUATION-INDUCED PINNING IN YBA2CU3O7 AND YBA2CU4O8 FILMS

被引：327

作者：

GRIESSEN, R ^{[1
]}

WEN, HH ^{[1
]}

VANDALEN, AJJ ^{[1
]}

DAM, B ^{[1
]}

RECTOR, J ^{[1
]}

SCHNACK, HG ^{[1
]}

LIBBRECHT, S ^{[1
]}

OSQUIGUIL, E ^{[1
]}

BRUYNSERAEDE, Y ^{[1
]}

机构：

[1] KATHOLIEKE UNIV LEUVEN,VASTE STOF FYS MAGNETISME LAB,B-3001 LOUVAIN,BELGIUM

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.72.1910

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The critical current j(c) and the pinning energy U(c) have been determined for three types of yttrium-based superconducting films from current j(s) and dynamic relaxation Q-dlnj(s)/dln(dB/dt) data by means of the generalized inversion scheme. For B < 2 T and T < 80 K the temperature dependence of j(c) and U(c) for all films is found to be in excellent agreement with a model of single vortices pinned by randomly distributed weak pinning centers via spatial fluctuations of the charge carrier mean free path. Pinning due to spatial fluctuations of T(c) is not observed.

引用

页码：1910 / 1913

页数：4

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