UNIVERSALITY IN THE CURRENT DECAY AND FLUX CREEP OF Y-BA-CU-O HIGH-TEMPERATURE SUPERCONDUCTORS

被引:220
作者
MALOZEMOFF, AP [1 ]
FISHER, MPA [1 ]
机构
[1] IBM RES,YORKTOWN HTS,NY 10598
来源
PHYSICAL REVIEW B | 1990年 / 42卷 / 10期
关键词
D O I
10.1103/PhysRevB.42.6784
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Recent data on flux creep in a variety of Y-Ba-Cu-O superconductors show a temperature-independent plateau in the magnetization decay Sieq-d lnM(t)/d ln(t), with values clustered in the range S=0.020 0.035. This apparent universality in S, which appears at odds with conventional flux-creep theories, can be explained naturally if one assumes the existence of a truly superconducting ordered phase at low temperatures that has a strongly nonlinear (exponential) I-V characteristic. © 1990 The American Physical Society.
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页码:6784 / 6786
页数:3
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