Control of magnon-photon coupling by spin torque

We demonstrate the influence of damping and field-like torques in the magnon-photon coupling process by classically integrating the generalized Landau-Lifshitz-Gilbert equation with RLC equation in which a phase correlation between dynamic magnetization and microwave current through combined Ampere and Faraday effects are considered. We show that the gap between two hybridized modes can be controlled in samples with damping parameter in the order of 10(-3) by changing the direction of the dc current density J if a certain threshold is reached. Our results suggest that an experimental realization of the proposed magnon-photon coupling control mechanism is feasible in yttrium iron garnet/Pt hybrid structures.

Automated summary

We demonstrate the influence of damping and field-like torques in the magnon-photon coupling process using classical integration of the generalized Landau-Lifshitz-Gilbert equation and RLC equation. By considering the phase correlation between dynamic magnetization and microwave current, we show that the gap between two hybridized modes can be controlled by changing the direction of the dc current density J in samples with damping parameter in the order of 10(-3). Our results suggest the feasibility of experimental realization of the proposed magnon-photon coupling control mechanism in yttrium iron garnet/Pt hybrid structures.