The reflection frequency response and bistability characteristic of a ferromagnetic resonator are studied experimentally and theoretically. The resonator is a 25-µm-thick rectangular yttrium-iron-garnet film with perpendicular magnetization. A technique to construct the bistability characteristic of the resonator from its measured response to a pulsed signal is suggested. It is demonstrated that the microwave bistability results from the intrinsic nonlinearity of ferromagnetic resonance. It is found that the bistability characteristic can adequately be described on the basis of a dispersive-bistability model.
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Fetisov et al. (2001) studied this question.
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