Commensurability effects induced by a periodic array of nanoscale anti-dots in Nb superconductor

A. A. Zhukov; E. T. Filby; P. A. J. de Groot; V. V. Metlushko; B. Ilic

doi:10.1016/j.physc.2003.11.048

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Commensurability effects induced by a periodic array of nanoscale anti-dots in Nb superconductor

A. A. Zhukov·E. T. Filby·P. A. J. de Groot·V. V. Metlushko·B. Ilic

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Abstract

We study the interactions of the vortex lattice with a periodic square array of holes in a superconducting Nb film using magnetic and resistive measurements. Three different temperature regions have been observed. They are governed by interplay between vortex-vortex interactions and pinning by holes. At low temperatures flux jumps suppress the commensurability anomalies. In all measurements a peak has been observed close to commensurate states 5-7. The Cole-Cole plot reveals significant changes in the flux penetration mechanism at this point.

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A. A. Zhukov, E. T. Filby, P. A. J. de Groot, V. V. Metlushko, B. Ilic. 2003-10-22. Commensurability effects induced by a periodic array of nanoscale anti-dots in Nb superconductor. https://doi.org/10.1016/j.physc.2003.11.048

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