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 language | English |
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Article number | 074707 |
Journal | journal of the physical society of japan |
Volume | 80 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2011 Jul |
Keywords
- Ferromagnetic insulator
- Fiske resonance
- Josephson junction
- Spin-wave
- Superconductor
ASJC Scopus subject areas
- Physics and Astronomy(all)