Entry of magnetic flux into a magnetically shielded type-II superconductor filament
arXiv:cond-mat/0412350 · doi:10.1103/PhysRevB.71.134519
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.
15 pages, 6 figures, RevTeX4; in print in Phys. Rev. B
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