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arxiv: cond-mat/0310526 · v1 · submitted 2003-10-22 · ❄️ cond-mat.supr-con · cond-mat.mes-hall· cond-mat.mtrl-sci

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

A.A.Zhukov (1) , E.T.Filby (1) , P. A. J. de Groot (1) , V.V.Metlushko (2) , B.Ilic (3) ((1) Department of Physics , Astronomy , University of Southampton , Southampton
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United Kingdom (2) Department of Electrical Computer Engineering University of Illinois at Chicago Chicago Illinois United States (3) Cornell Nanofabrication Facility School of Applied Engineering Physics Cornell University Ithaca New York United States)
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classification ❄️ cond-mat.supr-con cond-mat.mes-hallcond-mat.mtrl-sci
keywords arraybeencommensurabilityfluxholesinteractionsmeasurementsobserved
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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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