Abstract
Dynamic instabilities of magnetization in YIG spheres were studied by high-power ferromagnetic resonance at the first-order Suhl instability. By means of an analog feedback technique implementing the controlling scheme of Ott, Grebogi and Yorke, we suppressed the chaotic FMR signal and stabilized a periodic oscillation by applying a very small time-dependent feedback signal of less than 10−3 of the applied microwave power.
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