Nonlinear response of ferromagnetic film resonator under conditions of nonlinear damping of magnetization oscillations

摘要

Nonlinear response of a tangentially magnetized ferromagnetic film resonator has been experimentally studied under the conditions where the nonlinear effects in the resonator are related to four-wave parametric processes. It is shown that an increase in the microwave power supplied to the resonator leads to a nonlinear shift of the eigenfrequencies and broadening of the resonant absorption peaks. The latter phenomenon is related to the nonlinear damping of magnetization in the resonator. It is established that the nonlinear shift of the frequency is thresholdless, while the nonlinear damping has a threshold, the appearance of which also leads to limitation of the nonlinear shift of the resonator frequency.