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Superconducting films with antidot arrays - novel behavior of the critical current

G. R. Berdiyorov·M. V. Milošević·F. M. Peeters
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Abstract

Novel behavior of the critical current density $j_{c}$ of a regularly perforated superconducting film is found, as a function of applied magnetic field $H$. Previously pronounced peaks of $j_{c}$ at matching fields were always found to decrease with increasing $H$. Here we found a {\it reversal of this behavior} for particular geometrical parameters of the antidot lattice and/or temperature. This new phenomenon is due to a strong ``caging'' of interstitial vortices between the pinned ones. We show that this vortex-vortex interaction can be further tailored by an appropriate choice of the superconducting material, described by the Ginzburg-Landau parameter $κ$. In effective type-I samples we predict that the peaks in $j_{c}(H)$ at the matching fields are transformed into a {\it step-like behavior}.

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G. R. Berdiyorov, M. V. Milošević, F. M. Peeters. 2006-03-06. Superconducting films with antidot arrays - novel behavior of the critical current. https://doi.org/10.1209/epl%2Fi2006-10013-1

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