Abstract
High power ferromagnetic resonance experiments involving thin circular YIG films produce chaotic oscillations with broad band frequency spectra in the 0.5–25 MHz range. To eliminate chaotic oscillations, a delayed feedback of the ac component of the ferromagnetic resonance signal was used to modulate one of the system parameters, the applied static magnetic field. The chaotic oscillations were converted to oscillations of reduced periodicity, and ultimately the quiescent state, as the gain in the feedback loop was increased. Similar results have been obtained in numerical simulations.
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