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Title: Controlling flux flow dissipation by changing flux pinning in superconducting films
Authors: Grimaldi, G ×
Leo, A
Nigro, A
Silhanek, Alejandro
Verellen, Niels
Moshchalkov, Victor
Milosevic, M. V
Casaburi, A
Cristiano, R
Pace, S #
Issue Date: 14-May-2012
Publisher: American Institute of Physics
Series Title: Applied Physics Letters vol:100 issue:202601 pages:1-4
Abstract: 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.
ISSN: 0003-6951
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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