Controllable Josephson current through a pseudospin-valve structure

C Bell*, G Burnell, CW Leung, EJ Tarte, DJ Kang, MG Blamire, Chris Bell

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

80 Citations (Scopus)

Abstract

A thin Co/Cu/permalloy (Ni80Fe20) pseudospin-valve structure is sandwiched between superconducting Nb contacts. When the current is passed perpendicular to the plane of the film a Josephson critical current (I-C) is observed at 4.2 K, in addition to a magnetoresistance (MR) of similar to0.5% at high bias. The hysteresis loop of the spin-valve structure can be cycled to modulate the zero field I-C of the junction in line with the MR measurements. These modulations of resistance and I-C occur both smoothly and sharply with the field applied. For each type of behavior there is a strong correlation between the shape of the MR loops and the I-C modulation. (C) 2004 American Institute of Physics.

Original languageEnglish
Pages (from-to)1153-1155
Number of pages3
JournalApplied Physics Letters
Volume84
Issue number7
DOIs
Publication statusPublished - 16 Feb 2004

Keywords

  • PERPENDICULAR GIANT MAGNETORESISTANCES
  • PI-JUNCTION
  • FERROMAGNET
  • FABRICATION
  • MULTILAYERS
  • CONTACTS

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