Microscopic picture of the critical state in a superconductor with a periodic array of antidots

A. V. Silhanek, J. Gutierrez, R. B.G. Kramer, G. W. Ataklti, J. Van De Vondel, V. V. Moshchalkov, A. Sanchez

Research output: Contribution to journalArticleResearchpeer-review

19 Citations (Scopus)

Abstract

By using scanning Hall microscopy we visualize the progressive formation of the critical state with individual vortex resolution in a Pb thin film with a periodic pinning array. Slightly above the first penetration field, we directly observe a terraced critical state as proposed theoretically by Cooley and Grishin [Phys. Rev. Lett.10.1103/PhysRevLett.74.2788 74, 2788 (1995)]. However, at higher fields, the flux front tends to disorder and the classical Bean profile is restored. This study allows us to establish a clear link between the widely used integrated response measurements in the superconducting state and the nanoscale landscape defined by individual vortices. © 2011 American Physical Society.
Original languageEnglish
Article number024509
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
DOIs
Publication statusPublished - 28 Jan 2011

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