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arXiv · 2506.06996

Spin pumping driven by magnon-polaritons in a ferromagnet-coplanar superconducting resonator hybrid system

Dinesh Wagle·Yi Li·Anish Rai·Tomas Polakovic·Valentine Novosad·M. Benjamin Jungfleisch
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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. The magnon-photon coupling strength 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.

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Dinesh Wagle, Yi Li, Anish Rai, Tomas Polakovic, Valentine Novosad, M. Benjamin Jungfleisch. 2025-06-08. Spin pumping driven by magnon-polaritons in a ferromagnet-coplanar superconducting resonator hybrid system. https://arxiv.org/abs/2506.06996

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