Supercurrent pumping in Josephson junctions with a half-metallic ferromagnet

S. Takahashi, S. Hikino, M. Mori, J. Martinek, S. Maekawa

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33 Citations (Scopus)

Abstract

A Josephson current through a half-metallic ferromagnet between two conventional superconductors is theoretically studied. The spin dynamics such as magnon excitation plays a crucial role not only for the conversion between spin-singlet and spin-triplet pairs but also for the formation of the composite state of a triplet Cooper pair and magnon, by which the Josephson current flows between the superconductors. We propose the supercurrent pumping driven by the coherent precession of the magnetization by tuning the microwave frequency to the ferromagnetic resonance frequency in a ferromagnetic Josephson junction.

Original languageEnglish
Article number057003
JournalPhysical review letters
Volume99
Issue number5
DOIs
Publication statusPublished - 2007 Aug 3

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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