Title
Vortex entry conditions in type-II superconductors. Effect of surface defects Vortex entry conditions in type-II superconductors. Effect of surface defects
Author
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Source (journal)
Physica: C: superconductivity. - Amsterdam
Volume/pages
384(2003) :1-2 , p. 211-226
ISSN
0921-4534
ISI
000180305800026
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
The conditions for the vortex entry into type-II superconductors being in the mixed state, are studied by means of both numerical and analytical solution of the Ginzburg-Landau equations. A modulation instability of the superconducting order parameter is shown to occur when the kinematic momentum (or supervelocity) of the condensate reaches a threshold value at the superconductor edge or surface. Due to this instability, vortices start to nucleate at the edge/surface and then penetrate deeper into the sample. It is found that the presence of surface defects causes a noticeable drop of the first penetration field and leads to a qualitative change of the magnetization curve. Based on these results a simple phenomenological model of the edge or surface barrier, taking into account the effect of surface defects, is suggested. (C) 2002 Elsevier Science B.V. All rights reserved.
E-info
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000180305800026&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000180305800026&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000180305800026&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848