Direct dynamical coupling of spin modes and singlet Josephson supercurrent in ferromagnetic Josephson junctions

I. Petković, M. Aprili, S. E. Barnes, F. Beuneu, S. Maekawa

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Via a direct coupling between the order parameter and the singlet Josephson supercurrent we detect spin-wave resonances and their dispersion in ferromagnetic Josephson junctions in which the usual insulating or metallic barrier is replaced with a weak ferromagnet. The coupling arises within the Fraunhofer interferential description of the Josephson effect because the magnetic layer acts as a time-dependent phase plate. A spin-wave resonance at a frequency ωs implies a dissipation that is reflected as a depression in the current-voltage curve of the Josephson junction when ωs =2eV. We have thereby performed a resonance experiment on only 107 Ni atoms.

Original languageEnglish (US)
Article number220502
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number22
DOIs
StatePublished - Dec 3 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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