Experimental investigation of the magnetic behavior of superconducting- normal-superconducting Josephson junctions

K. Bures, S. E. Barnes, K. Baberschke

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We have measured the magnetic field dependence of the supercurrent in micron-size medium and high current density superconducting-normal- superconducting Nb-Au-Nb Josephson junctions. We find good quantitative agreement between the experiment and a theory for the distributed Josephson effect in such junctions. For finite bias voltages, high current density junctions show a monotonic decrease in the effective critical current with increasing field in sharp contrast to the resistively shunted junction model which predicts the well-known Fresnel-type behavior. Our medium current density junctions represent an intermediate case, residual Fresnel behavior is observed at small bias voltages, but a monotonic decrease with the field is observed for higher bias voltages.

Original languageEnglish (US)
Pages (from-to)7073-7077
Number of pages5
JournalJournal of Applied Physics
Volume54
Issue number12
DOIs
StatePublished - Dec 1 1983
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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