Vortex pinning in superconducting Nb thin films deposited on nanoporous alumina templates

W. Vinckx, J. Vanacken, V.V. Moshchalkov, Stefan Mátéfi-Tempfli, M. Mátéfi-Tempfli, S. Michotte, L. Piraux

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstrakt

We present a study of magnetization and transport properties of superconducting Nb thin films deposited on nanoporous aluminium oxide templates. Periodic oscillations in the critical temperature vs. field, matching effects in fields up to 700 mT and strongly enhanced critical currents were observed. These fields are considerably higher than those typical for periodic pinning arrays made by lithographic techniques, which reflects the benefits of nanostructuring superconductors by using self-organized growth. This method provides a periodic pinning potential with sub-100 nm spacing between the pinning centers, which enhances vortex pinning in broad field and temperature ranges.
OriginalsprogEngelsk
TidsskriftEuropean Physical Journal B. Condensed Matter and Complex Systems
Vol/bind53
Udgave nummer2
Sider (fra-til)199-203
Antal sider5
ISSN1434-6028
DOI
StatusUdgivet - 1. sep. 2006

Fingeraftryk

Dyk ned i forskningsemnerne om 'Vortex pinning in superconducting Nb thin films deposited on nanoporous alumina templates'. Sammen danner de et unikt fingeraftryk.

Citationsformater