Composite excitation of josephson phase and spin waves in josephson junctions with ferromagnetic insulator

Shin Ichi Hikino, Michiyasu Mori, Saburo Takahashi, Sadamichi Maekawa

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Coupling of Josephson-phase and spin-waves is theoretically studied in a superconductor/ferromagnetic insulator/ superconductor (S/FI/S) junction. Electromagnetic (EM) field inside the junction and the Josephson current coupled with spin-waves in FI are calculated by combining Maxwell and Landau-Lifshitz-Gilbert equations. In the S/FI/Sjunction, it is found that the current-voltage (I-V) characteristic shows two resonant peaks for each mode of the EM field. Voltages at the resonant peaks are obtained as a function of the normal modes of EM field, which indicates a composite excitation of the EM field and spin-waves in the S/FI/S junction. We also examine another type of junction, in which a nonmagnetic insulator (I) is located at one of interfaces between S and FI. In such a S/I/FI/S junction, three resonant peaks appear in the I-V curve, since the Josephson-phase couples to the EM field in the I layer.

Original languageEnglish
Article number074707
Journaljournal of the physical society of japan
Volume80
Issue number7
DOIs
Publication statusPublished - 2011 Jul

Keywords

  • Ferromagnetic insulator
  • Fiske resonance
  • Josephson junction
  • Spin-wave
  • Superconductor

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Composite excitation of josephson phase and spin waves in josephson junctions with ferromagnetic insulator'. Together they form a unique fingerprint.

Cite this