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Demagnetization effects upon the lower critical field of an anisotropic type II superconductor of ellipsoidal shape

✍ Scribed by R. A. Klemm

Publisher
Springer US
Year
1980
Tongue
English
Weight
499 KB
Volume
39
Category
Article
ISSN
0022-2291

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✦ Synopsis

The demagnetization factors for a material with an arbitrary permeability tensor ~ and with general ellipsoidal shape are found. These demagnetization factors are used to relate the bulk lower critical field H~I in anisotropic superconductors to the angles of the external applied field. It is found that the anomalies in the angular dependence of Hcl predicted by Klemm and Clem for highly anisotropic bulk superconductors are also present for materials of highly aspherical shape. The special cases of highly oblate and prolate spheroids, corresponding to the layered and filamentary superconductors, are considered in detail.

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