Vortex Trapping an Expulsion in Thin-Film Type-II Supercondu cting Strips

K.H. Kuit, J.R. Kirtley, John R. Clem, Horst Rogalla, Jakob Flokstra

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Abstract

Vortex trapping is investigated in thin-film strips of superconducting material. We present a model for the critical field above which vortex trapping occurs in these strips. This model includes the pairing energy of vortex-antivortex pairs in addition to the energy of single vortices. Experimental verification of the model with a scanning SQUID microscope shows very good agreement between the model and experiments on YBa2Cu3O7-delta and Nb strips. Statistical analysis of the vortex distribution in the strips above the critical field has been performed and a comparison has been made between Nb and YBa2Cu3O7-delta for the distributions in the lateral and longitudinal directions.
Original languageUndefined
Pages (from-to)3537-
JournalIEEE transactions on applied superconductivity
Volume19
Issue number3
DOIs
Publication statusPublished - 2009

Keywords

  • IR-71142
  • METIS-260820
  • yttrium compounds
  • high-temperature superconductors
  • superconducting thin films
  • type II superconductors
  • SQUIDs
  • Barium compounds

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