Matching effect and flux pinning force in a Nb superconducting thin film with a triangular lattice of artificial pinning centers

Lance Horng, J. C. Wu, P. C. Kang, T. C. Wu, T. J. Yang

Research output: Contribution to journalArticle

Abstract

A strong pinning force in a Nb superconducting thin film is formed by a triangular lattice of defects due to the structural corrugation that acts as pinning centers. The magnetoresistance measurement close to the transition temperature shows a set of minima of magnetoresistance at equal external field intervals. A crossover in current-voltage relations with matching field and half-integer matching field occurs for currents exceeding a certain threshold value. The phenomenon is related to the presence of pinning structures at matching fields.

Original languageEnglish
Pages (from-to)e1107-e1108
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2004 May 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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