Article (Scientific journals)
Influence of artificial pinning on vortex lattice instability in superconducting films
Silhanek, Alejandro; Leo, A.; Grimaldi, G. et al.
2012In New Journal of Physics, 14, p. 053006
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Keywords :
Larkin-Ovchinnikov instabilities
Abstract :
[en] In superconducting films under an applied dc current, we analyze experimentally and theoretically the influence of engineered pinning on the vortex velocity at which the flux-flow dissipation undergoes an abrupt transition from low to high resistance. We argue, based on a nonuniform distribution of vortex velocity in the sample, that in strongly disordered systems the mean critical vortex velocity for flux-flow instability (i) has a nonmonotonic dependence on magnetic field and (ii) decreases as the pinning strength is increased. These findings challenge the generally accepted microscopic model of Larkin and Ovchinnikov (1979 J. Low. Temp. Phys. 34 409) and all subsequent refinements of this model which ignore the presence of pinning centers.
Disciplines :
Physics
Author, co-author :
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique de la matière condensée
Leo, A.;  Universita degli Studi di Salerno > Fisica
Grimaldi, G.;  Universita degli Studi di Salerno > Fisica
Berdiyorov, G.R.;  Universiteit Antwerpen - UA > Fysica
Milosevic, M.V.;  Universiteit Antwerpen - UA > Fysica
Nigro, A.;  Universita degli Studi di Salerno > Fisica
Pace, S.;  Universita degli Studi di Salerno > Fisica
Verellen, N.;  Katholieke Universiteit Leuven - KUL > Physics and Astronomy
Gillijns, W.;  Katholieke Universiteit Leuven - KUL > Physics and Astronomy
Metlushko, V.;  University of Illinois > Department of Electrical and Computer Engineering
Ilic, B.;  Cornell University > School of Applied and Engineering Physics
Zhu, Xiaobin;  Seagate Technology Inc
Moshchalkov, V.V.;  Katholieke Universiteit Leuven - KUL > Physics and Astronomy
More authors (3 more) Less
Language :
English
Title :
Influence of artificial pinning on vortex lattice instability in superconducting films
Publication date :
04 May 2012
Journal title :
New Journal of Physics
ISSN :
1367-2630
Publisher :
Institute of Physics, Bristol, United Kingdom
Volume :
14
Pages :
053006
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 May 2012

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