Modification of the current distribution in a superconducting strip by a thin film magnetic shield
Abstract
Magnetic environment may drastically change electric current distribution in superconducting strips. It was shown that for an infinite magnetic surrounding, the total current in such strips is substantially enhanced. In practice, however, the important question is the effect of the finite-size of a magnetic shield on the current redistribution. In this work, transport current patterns were studied numerically in a flux-free superconducting strip located near a planar magnetic wall of arbitrary thickness for different magnetic permeabilities. We found that the reduction of the edge current peaks, caused by the magnetic shielding, saturates rapidly with the increase of the shield thickness. This result can be used to improve current-carrying capability of superconductors by using small-thickness magnetic shields, where finite-size effect could be compensated by a large magnetic permeability.
- Publication:
-
APS Southeastern Section Meeting Abstracts
- Pub Date:
- October 2002
- Bibcode:
- 2002APS..SES.HB003G