Ferromagnetic resonance with a magnetic Josephson junction
S. E. Barnes, M. Aprili, I. Petkovic, and S. Maekawa
TL;DR
This paper demonstrates a coupling mechanism between ferromagnetic spin waves and Josephson supercurrents via the Aharonov-Bohm phase, revealing electromagnetic interactions through experimental and theoretical analysis.
Contribution
It introduces and experimentally verifies a novel coupling between ferromagnetic order parameters and Josephson currents mediated by the Aharonov-Bohm phase.
Findings
Observation of magnetic resonance side-bands to microwave-induced Shapiro steps
Demonstration of electromagnetic coupling between ferromagnet and Josephson junction
Measurement of spin wave dispersion via magnetic field variation
Abstract
We show experimentally and theoretically that there is a coupling via the Aharonov-Bohm phase between the order parameter of a ferromagnet and a singlet, s-wave, Josephson supercurrent. We have investigated the possibility of measuring the dispersion of such spin waves by varying the magnetic field applied in the plane of the junction and demonstrated the electromagnetic nature of the coupling by the observation of magnetic resonance side-bands to microwave induced Shapiro steps.
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