Title
Negative-<tex>$\mu$</tex> regime in the ac magnetic response of superconductor nanoshells Negative-<tex>$\mu$</tex> regime in the ac magnetic response of superconductor nanoshells
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Solid state communications. - New York, N.Y.
Volume/pages
152(2012) :18 , p. 1781-1785
ISSN
0038-1098
ISI
000308776600016
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The time-dependent GinzburgLandau formalism is applied to analyze the vortex states and vortex dynamics in superconducting spherical nanoshells, subjected to mutually perpendicular strong dc and weak ac magnetic fields. We demonstrate that nonuniformity of the shell thickness can dramatically affect the ac magnetic response of a 3D array of superconducting nanoshells. Remarkably, this response is strongly influenced not only by the relevant geometric and material parameters and the ac-field frequency but also by the magnitude of the applied dc field: by changing this field the real part of the effective ac magnetic permeability can be tuned from positive values significantly larger than one down to negative values.
E-info
https://repository.uantwerpen.be/docman/iruaauth/130a4a/dab98b7594f.pdf
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