Critical state in type-II superconductors of arbitrary shape

Abstract

The well-known Bean critical state equations in general are not sufficient to describe the critical state of type-II superconductors when the sample shape is not symmetric. We show how one can find the critical state in superconductors of arbitrary shape. Analyzing a simple example of nonsymmetry, we demonstrate that in the general case, a perturbation of the current distribution in the critical state propagates into the sample smoothly in a diffusive way. This is in contrast to the usual Bean critical state where the current distribution changes abruptly at a narrow front.

4 pages, 1 figure, appears in Phys. Rev. B 71, issue 1 (2005)

References in corpus (2)

• Vector magnetic hysteresis of hard superconductors
• Critical state theory for nonparallel flux line lattices in type-II superconductors

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• Nanomechanics of an individual vortex in an anisotropic type-II superconductor
• Analysis of Critical State Response in Thin Films by ac Susceptibility Measurements
• Anisotropic critical-state model of type-II superconducting slabs
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