Large Predicted Self-Field Critical Current Enhancements In Superconducting Strips Using Magnetic Screens

Yu. A. Genenko; A. Usoskin; H. C. Freyhardt

doi:10.1103/PhysRevLett.83.3045

Large Predicted Self-Field Critical Current Enhancements In Superconducting Strips Using Magnetic Screens

Yu. A. Genenko, A. Usoskin, and H. C. Freyhardt

Phys. Rev. Lett. 83, 3045 – Published 11 October 1999

Abstract

A transport current distribution over a wide superconducting sheet is shown to strongly change in the presence of bulk magnetic screens of a soft magnet with a high permeability. Depending on the geometry, the effect may drastically suppress or protect the Meissner state of the sheet through the enhancement or suppression of the edge barrier critical current. The total transport current in the magnetically screened Meissner state is expected to compete with the critical current of the flux-filled sheet only for samples whose critical current is initially essentially controlled by the edge barrier effect.

Received 16 February 1999

DOI:https://doi.org/10.1103/PhysRevLett.83.3045

Authors & Affiliations

Yu. A. Genenko^1,2, A. Usoskin³, and H. C. Freyhardt^1,3

¹Institut für Materialphysik, Universität Göttingen, Hospitalstrasse 3-7, D-37073, Göttingen, Germany
²Donetsk Physical and Technical Institute, National Academy of Science Ukraine, 340114 Donetsk, Ukraine
³Zentum für Funktionswerkstoffe gGmbH, Windausweg 2, D-37073, Göttingen, Germany