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Enhanced pinning and proliferation of matching effects in a superconducting film with a Penrose array of magnetic dots

A. V. Silhanek·W. Gillijns·V. V. Moshchalkov·B. Y. Zhu·J. Moonens·L. H. A. Leunissen
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Abstract

The vortex dynamics in superconducting films deposited on top of a five-fold Penrose array of magnetic dots is studied by means of transport measurements. We show that in the low pinning regime (demagnetized dots) a few periodic and aperiodic matching features coexist. In the strong pinning regime (magnetized dots) a richer structure of unforeseen periodic and aperiodic vortex patterns appear giving rise to a clear enhancement of the critical current in a broader field range. Possible stable vortex configurations are determined by molecular dynamics simulations.

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A. V. Silhanek, W. Gillijns, V. V. Moshchalkov, B. Y. Zhu, J. Moonens, L. H. A. Leunissen. 2006-11-07. Enhanced pinning and proliferation of matching effects in a superconducting film with a Penrose array of magnetic dots. https://doi.org/10.1063/1.2361172

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