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Entry of magnetic flux into a magnetically shielded type-II superconductor filament

S. V. Yampolskii·Yu. A. Genenko
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Abstract

In the framework of the London approximation the magnetic flux penetration into a type-II superconductor filament surrounded by a soft-magnet sheath and exposed to a transverse external magnetic field is studied. The lower transverse critical field as well as the critical field and the critical current of the first vortex nucleation at the superconductor/magnet interface are calculated on the basis of an exact solution for a vortex of arbitrary plane configuration. The Bean-Livingston barrier against the vortex nucleation is shown to strongly depend on the magnet sheath parameters.

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S. V. Yampolskii, Yu. A. Genenko. 2004-12-14. Entry of magnetic flux into a magnetically shielded type-II superconductor filament. https://doi.org/10.1103/physrevb.71.134519

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