Spin pumping driven by magnon-polaritons in a ferromagnet–coplanar superconducting resonator hybrid system
Phys. Rev. Applied 26, 014012 – Published 6 July, 2026
DOI: https://doi.org/10.1103/3d5g-qydt
Abstract
We demonstrate spin pumping driven by a strongly coupled magnon-photon system using a ferromagnet-coplanar superconducting resonator hybrid system at 1.4 K. Electrical readout via the inverse spin Hall effect reveals characteristic coupling features, including mode splitting and linewidth broadening, demonstrating the electrical detection of strongly coupled microwave photons and magnons. Magnon-photon coupling obtained by combined spin pumping and inverse spin Hall effect measurements is compared to microwave transmission experiments. Furthermore, microwave-power-dependent measurements reveal a decrease in the coupling strength with increasing microwave power alongside the onset of nonlinearities of the superconducting resonator above a critical microwave-power threshold.
