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Double-step behavior of the critical current vs. magnetic field in a metal ceramic: theory
A new model is developed todescribe the phsyics of a strong magnetic filed H influence on the high-T c metal ceramic critical current J c. The point is that in the most general case the J c(H) value is determined by the magnitude of a surface current j sf induced in the granules. The basic idea of t...
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Published in: | Physica. C, Superconductivity Superconductivity, 1994-12, Vol.235, p.3087-3088 |
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Main Author: | |
Format: | Article |
Language: | English |
Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | A new model is developed todescribe the phsyics of a strong magnetic filed H influence on the high-T
c metal ceramic critical current J
c. The point is that in the most general case the J
c(H) value is determined by the magnitude of a surface current j
sf induced in the granules. The basic idea of the model is that the surface current density j
sf is the sum of two components j
sf=j
m+j
g. In the Meissner state j
m is a diamagnetic (equilibrium) surface shielding current. In the mixed state j
g is induced intragrain current whose sign depends on the magnetic history. |
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ISSN: | 0921-4534 1873-2143 |
DOI: | 10.1016/0921-4534(94)91070-7 |