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Title: AC susceptibility of superconducting films with a periodic pinning array
Authors: Silhanek, Alejandro
Raedts, Sophie
Lange, Martin
Moshchalkov, Victor #
Issue Date: 2004
Series Title: Physica. C, Superconductivity vol:408-10 pages:516-517
Conference: date:Katholieke Univ Leuven, Lab Vaste Stoffys Magnetisme, B-3001 Louvain, Belgium
Abstract: We use AC-susceptibility measurements to study the dynamic response of vortices in a Pb thin film with a periodic array of antidots. In the linear regime, from the field dependence of the AC-penetration depth lambda we determine the curvature of the pinning potential well alpha for different matching fields. For applied fields H below the first matching field H-1, alpha reaches its highest value due to the strong vortex localization at the pinning sites. For H-1 < H < H-2, the metallic-like behavior of interstitial vortices gives rise to a reduction of alpha and a further decrease of the pinning strength is observed for H-2 < H < H-3. However, for H-3 < H < H-4, a reentrance in the pinning strength appears, due to a specific configuration of the flux line lattice which strongly restricts the mobility of vortices.
ISSN: 0921-4534
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Tutorial services, Faculty of Science
# (joint) last author

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