Critical Current Problems in HTc Superconductors
J. Sosnowski
Electrotechnical Institute, M. Po┼╝aryskiego 28, 04-703 Warsaw, Poland
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New results of the investigations critical current problems in the high temperature oxide superconductors are presented, basing on the flux pinning analysis. Model of the pinning interaction of the nanosized centers with pancake vortices is proposed, while comparison of the received results concerning the dependence of the potential barrier versus transport current with other pinning forces approaches is presented. Special attention is devoted to the investigations of the influence the initial position of the vortex captured at pinning center on the current-voltage characteristics and critical current.
DOI: 10.12693/APhysPolA.118.328
PACS numbers: 74.72.-h, 74.25.Wx, 74.25.Sv, 74.25.Uv