Transport and vortex pinning in micron-size superconducting Nb films

Lamya Ghenim*, Jean Yves Fortin, Gehui Wen, Xixiang Zhang, Claire Baraduc, Jean Claude Villegier

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We have carried out Hall measurements on thin films of Nb in the flux-flow regime. The Hall bars were several microns in scale. Oscillations with magnetic field in the transverse and longitudinal resistances between the depinning field Bd and the upper critical field Bc2 are observed below Tc. The Hall effect may even change sign. The transverse and longitudinal resistances are interpreted in terms of current-driven motion of vortices in the presence of a few impurities. Simulations from time-dependent Ginzburg-Landau equations confirm this argument.

Original languageEnglish (US)
Article number064513
Pages (from-to)645131-645135
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume69
Issue number6
StatePublished - Feb 2004
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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