Regensburg 2025 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 20: Magnonics II

MA 20.4: Vortrag

Mittwoch, 19. März 2025, 10:15–10:30, H16

Higher Order Resonances in Periodically Driven Magnon Systems — •Jan Mathis Giesen, Alexandre Abbass Hamadeh, Philipp Pirro, Imke Schneider, and Sebastian Eggert — RPTU, Kaiserslautern, Germany

We analyze resonant excitations of ferromagnetic magnons via microwave pumping below the threshold frequency using Floquet theory. A special feature of parameteric resonance is the possibility to create magnons with higher energy than the driving frequency, which allows for new tuning possibilities. We develop a theoretical framework that analytically predicts the region of resonances and resonance thresholds in thin films of ferro- and ferri-magnetic materials as a function of damping, amplitude and frequency. The results are compared with micomagnetic simulations.

Keywords: Floquet theory; Parametric resonance; parallel pumping; parametric driving; pumping threshold