Flux jumping in thin films

R. Mints, E. Brandt

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

The thermomagnetic flux-jump instability of the Bean critical state is considered, which may occur during flux penetration in thin films of type-II superconductors in a perpendicular magnetic field. We calculate the applied field (Formula presented) at which this instability occurs and its dependence on the ramp rate (Formula presented), on the nonlinear current-voltage curve, and on the thermal resistance between the film and the substrate. As examples we consider the thermomagnetic flux-jump instability at the straight edge of a superconducting film and of the same edge containing a small indentation of semicircular shape. The presence of a small indentation drastically reduces the field or ramp rate at which the thermomagnetic instability occurs.

Original languageEnglish
Pages (from-to)12421-12426
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number17
DOIs
StatePublished - 1996

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