Suppression of dissipation in Nb thin films with triangular antidot arrays by random removal of pinning sites

Details Suppression of dissipation in Nb thin films with triangular antidot arrays by random removal of pinning sites Suppression of dissipation in Nb thin films with triangular antidot arrays by random removal of pinning sites

2008-09-10

arxiv.org/abs/0809.1743v1

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

The depinning current Ic versus applied magnetic field B close to the transition temperature Tc of Nb thin films with randomly diluted triangular arrays of antidots is investigated. % Our experiments confirm essential features in Ic(B) as predicted by Reichhardt and Olson Reichhardt [Phys.Rev. B 76, 094512 (2007)]. % We show that, by introducing disorder into periodic pinning arrays, Ic can be enhanced. % In particular, for arrays with fixed density n_p of antidots, an increase in dilution Pd induces an increase in Ic and decrease of the flux-flow voltage for B>Bp=n_p Phi_0.

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