Vortex phases in superconducting Nb thin films with periodic pinning
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2005
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American Physical Society
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Abstract
Magnetotransport properties have been used to investigate vortex phases in Nb films with periodic arrays of magnetic pinning centers. This kind of samples show a continuous glass transition similar to that observed in Nb plain films, but the periodic pinning yields different critical exponents and enhanced glass transition temperature at the matching field.
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©2005 The American Physical Society.
We would like to thank the Spanish Ministerio de Educación y Ciencia for support under Grant Nos. MAT202-04543 and MAT2002-12385-E, CAM under Grant No. GR/ MAT/0617/2002, and the “Ramón Areces” Foundation. One of us, E.M.G., wants to thank the Spanish Ministerio de Educación y Ciencia for a “Ramón y Cajal” contract.