Paramagnetic Meissner effect of highTc superconductors IIA phenomenological local moment model

被引：0
|
作者：
Yusheng HE
C. M. Muirhead
W. F. Vinen
机构：
[1] Chinese Academy of Sciences,Cryogenic Laboratory
[2] University of Birmingham,School of Physics & Space Research
来源：
Science in China Series A: Mathematics | 1998年 / 41卷
关键词：
high; superconductivity; paramagnetic Meissner effect; small particles; local moment; phenomenological model;
D O I：
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学科分类号：
摘要：
A range of powdered Bi:2 212 samples exhibiting the paramagnetic Meissner effect (PME) are systematically examined. Interpretation of the results is made in terms of a phenomenological model in which there is a concentration within the material of small local moments that can be polarized during a field cooling. Information about the magnitudes of these local m0oments and their distribution are deduced. Relations between the local moments and the particle sizes, the weak link, oxygen content and the interactions between the local moments are also discussed. Comparison of the results from small particles and bulk samples shows that conclusions obtained from small particle experiments are reliable and universal.
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页码：761 / 772
页数：11
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