Article (Scientific journals)
Controlling flux flow dissipation by changing flux pinning in superconducting films
Grimaldi, G; Leo, A; Nigro, A et al.
2012In Applied Physics Letters, 100, p. 202601
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Keywords :
superconductivity; flux-flow; Larkin-Ovchinnikov instabilities
Abstract :
[en] We study the flux flow state in superconducting materials characterized by rather strong intrinsic pinning, such as Nb, NbN, and nanostructured Al thin films, in which we drag the superconducting dissipative state into the normal state by current biasing. We modify the vortex pinning strength either by ion irradiation, by tuning the measuring temperature or by including artificial pinning centers. We measure critical flux flow voltages for all materials and the same effect is observed: switching to low flux flow dissipations at low fields for an intermediate pinning regime. This mechanism offers a way to additionally promote the stability of the superconducting state.
Disciplines :
Physics
Author, co-author :
Grimaldi, G;  Universita degli Studi di Salerno > Fisica
Leo, A;  Universita degli Studi di Salerno > Fisica
Nigro, A;  Universita degli Studi di Salerno > Fisica
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique de la matière condensée
Verellen, N;  Katholieke Universiteit Leuven - KUL > Physics
Moshchalkov, V.V.;  Katholieke Universiteit Leuven - KUL > Physics
Milosevic, M.V.;  Universiteit Antwerpen - UA > Physics
Casaburi, A.;  Istituto di Cibernetica “E. Caianiello"
Cristiano, R.;  Istituto di Cibernetica “E. Caianiello"
Pace, S.;  Universita degli Studi di Salerno > Fisica
Language :
English
Title :
Controlling flux flow dissipation by changing flux pinning in superconducting films
Publication date :
14 May 2012
Journal title :
Applied Physics Letters
ISSN :
0003-6951
eISSN :
1077-3118
Publisher :
American Institute of Physics, Melville, United States - New York
Volume :
100
Pages :
202601
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 May 2012

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