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

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

2006-11-07

arxiv.org/abs/cond-mat/0611173v1

Appl. Phys. Lett. 89, 152507 (2006)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1063/1.2361172

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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