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Title
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Controlling flux flow dissipation by changing flux pinning in superconducting films
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Author
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Abstract
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| 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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4718309] |
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Language
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English
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Source (journal)
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Applied physics letters / American Institute of Physics. - New York, N.Y., 1962, currens
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Publication
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New York, N.Y.
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American Institute of Physics
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2012
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ISSN
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0003-6951
[print]
1077-3118
[online]
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DOI
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10.1063/1.4718309
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Volume/pages
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100
:20
(2012)
, p. 202601,1-202601,4
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Article Reference
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202601
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ISI
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000304265000051
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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