Enhanced supercurrents in josephson junctions containing nonparallel ferromagnetic domains

J. W.A. Robinson, Gábor B. Halász, A. I. Buzdin, M. G. Blamire

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

π coupling may arise when a ferromagnet forms a link between two superconductors of an artificial Josephson junction. Using a trilayer Fe/Cr/Fe barrier in which the Cr thickness determines the alignment of the Fe layers, we show that the critical currents are substantially enhanced in the antiparallel configuration. The result agrees with existing superconductor-ferromagnet proximity theory according to which the phase-controlling effects of ferromagnets on Cooper pairs can be minimized by arranging their moments in a nonparallel way.

Original languageEnglish
Article number207001
JournalPhysical Review Letters
Volume104
Issue number20
DOIs
StatePublished - May 18 2010
Externally publishedYes

Funding

FundersFunder number
Engineering and Physical Sciences Research CouncilEP/E026206/1, EP/E026532/1, EP/F016611/1

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