Title: High field matching effects in superconducting Nb porous arrays catalyzed from anodic alumina templates
Authors: Vinckx, Wim ×
Vanacken, Johan
Moshchalkov, Victor
Matefi-Tempfli, S
Matefi-Tempfli, M
Michotte, S
Piraux, L
Ye, Xingpu #
Issue Date: Aug-2007
Publisher: North-Holland
Series Title: Physica C, Superconductivity vol:459 issue:1-2 pages:5-10
Abstract: Vortex pinning in a superconducting Nb thin film deposited on an anodically grown alumina template is investigated. Anodic oxidation of aluminium layers permits under specific conditions the formation of highly ordered porous alumina, a membrane-like structure consisting of triangular arrays of parallel pores. Its pore diameter and interpore distance are set by careful tuning of the anodization parameters. A superconducting Nb thin film is deposited directly onto the alumina film. The porous alumina acts as a template and it allows Nb to form a periodic pinning array during its growth. Pinning force vs. field measurements derived from magnetization measurements, show matching effects in fields up to 1 T. We demonstrate that the anodic alumina template with 50 nm interpore spacing provides enhanced vortex pinning in a large field and temperature range. (C) 2007 Elsevier B.V. All rights reserved.
ISSN: 0921-4534
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Department of Materials Engineering - miscellaneous
× corresponding author
# (joint) last author

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