Spin valve josephson junctions

Christopher Bell, Gavin Burnell, Chi Wah Leung, Edward J. Tarte, Mark G. Blamire

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

We are currently researching Nb-based Josephson junctions with magnetic barriers in which the magnetic character can be actively changed, with the final aim of producing a magnetically controllable π-junction. Pseudo-spin-valve Nb/Fe20Ni80/Cu/Co/Nb Josephson junctions have been grown by d.c. magnetron sputtering. As we have previously reported [1], the spin-valve magnetoresistance could be measured at high bias at 4.2 K. The zero field critical current of the junction could also be varied by preparing the spin valve in different remanent states. Jumps and smooth changes in the critical current were observed, in line with the changes in magnetoresistance. In this work we discuss the effect of varying the total barrier thicknesses on the change in the critical current, as well as varying the Co: Fe20Ni80ratio.
Original languageEnglish
Pages (from-to)908-911
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume15
Issue number2 PART I
DOIs
Publication statusPublished - 1 Jun 2005
Externally publishedYes

Keywords

  • Josephson junctions
  • Niagnetoresistive devices

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

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