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Defect controlled vortex generation in current-carrying narrow superconducting strips | | D.Yu. Vodolazov
; K. Ilin
; M. Merker
; M. Siegel
; | | Date: |
8 Jul 2015 | | Abstract: | We experimentally study effect of single circular hole on the critical
current $I_c$ of narrow superconducting strip with width $W$ much smaller than
Pearl penetration depth $Lambda$. We found nonmonotonous dependence of $I_c$
on the location of a hole across the strip and a weak dependence of $I_c$ on
radius of hole has been found in case of hole with $xi ll R ll W$ ($xi$ is
a superconducting coherence length) which is placed in the center of strip. The
observed effects are caused by competition of two mechanisms of destruction of
superconductivity - the entrance of vortex via edge of the strip and the
nucleation of the vortex-antivortex pair near the hole. The mechanisms are
clearly distinguishable by difference in dependence of $I_c$ on weak magnetic
field. | | Source: | arXiv, 1507.2234 | | Services: | Forum | Review | PDF | Favorites | |
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