Controlling flux flow dissipation by changing flux pinning in superconducting films | Zendy

G. Grimaldi | Zendy; Antonio Leo | Zendy; A. Nigro | Zendy; A. V. Silhanek | Zendy; Niels Verellen | Zendy; V. V. Moshchalkov | Zendy; M. V. Miloševıć | Zendy; A. Casaburi | Zendy; R. Cristiano | Zendy; S. Pace | Zendy

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Controlling flux flow dissipation by changing flux pinning in superconducting films

Author(s) -

G. Grimaldi,

Antonio Leo,

A. Nigro,

A. V. Silhanek,

Niels Verellen,

V. V. Moshchalkov,

M. V. Miloševıć,

A. Casaburi,

R. Cristiano,

S. Pace

Publication year - 2012

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4718309

Subject(s) - superconductivity , condensed matter physics , flux pinning , pinning force , dissipative system , dissipation , drag , materials science , vortex , flux (metallurgy) , biasing , voltage , high temperature superconductivity , physics , critical current , mechanics , thermodynamics , quantum mechanics , metallurgy

We study the flux flow state in superconducting materials characterized by rather strong intrinsicpinning, such as Nb, NbN, and nanostructured Al thin films, in which we drag the superconductingdissipative state into the normal state by current biasing. We modify the vortex pinning strengtheither by ion irradiation, by tuning the measuring temperature or by including artificial pinningcenters. 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. Thismechanism offers a way to additionally promote the stability of the superconducting state.status: publishe

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