FLUX TRAPPING AND ITS EFFECT ON AC SUSCEPTIBILITY OF GRANULAR SUPERCONDUCTORS

被引：1
作者：
SAHA, S
DAS, BK
机构：
[1] Materials Division, National Physical Laboratory, New Delhi, 110 012, Dr K S Krishnan Road
来源：
BULLETIN OF MATERIALS SCIENCE | 1994年 / 17卷 / 06期
关键词：
SUSCEPTIBILITY; SUPERCONDUCTORS; CRITICAL STATE;
D O I：
10.1007/BF02757543
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Experimental data on the real (chi') and imaginary (chi'') parts of AC magnetic susceptibility as a function of DC bias field (H) shows the effect of trapped flux in granular high T-c superconductors. The aim was to substantiate our recent theoretical findings on the basis of a two-component critical state model suitable for granular high T-c superconductors. Stress has been given to understanding the origin of hysteresis in chi'(H) and chi''(H). It was seen in the experimental data that above a certain value of DC field range irreversibility appears in chi'(H) and chi''(H) creating hysteresis like loops. Comparison of data with calculated loops shows good agreement. chi'(H) and chi''(H) curves show considerable asymmetry in presence of trapped flux.
引用
收藏
页码：595 / 606
页数：12
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