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Exact solution for the critical state in thin superconductor strips with field-dependent or anisotropic pinning

Grigorii P. Mikitik, Ernst Helmut Brandt

DOI 10.1103/PhysRevB.62.6812 · Physical Review B

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Abstract

An exact analytical solution is given for the critical state problem in long thin type-II superconductor strips in a perpendicular magnetic field for the case when the critical current density jc(B) depends on the local induction B according to a simple three-parameter model. This model describes both isotropic superconductors with this jc(B) dependence, but also superconductors with anisotropic pinning with a dependence jc(θ) where θ is the tilt angle of the flux lines away from the normal to the specimen plane.

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