Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: K1.00211 : Strongly anisotropic flux pinning in superconducting PbBi thin films covered by periodic ferromagnet stripes
Author:
We have studied the vortex pinning via their magnetic interaction
with a
periodic structure of parallel magnetic stripes. Superconducting
lead-bismuth (82{\%} Pb and 18{\%} Bi) alloy films were covered
by an
insulating Ge layer and periodic a Ni array of magnetic stripes
fabricated
on the top of the Ge layer by electron-beam lithography and thermal
evaporation. The critical current density was significantly
stronger when
the current was applied parallel to the stripes than when the
current was
perpendicular to the stripes. This is attributed to the barrier
to the
vortex motion provided by the magnetic interaction with magnetic
stripes.
The enhancement in critical current was most significant at
temperatures
close to the superconducting transition temperature.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.K1.211
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