In this paper it is experimentally demonstrated that in the composite resonator structure with ferromagnetic and piezoelectric films magnetic oscillations can be excited and detected directly by means of an electroacoustic transducer of bulk acoustic waves. Excitation of nonuniform ferromagnetic resonance occurs at frequencies close to those of the magnetoelastic resonance in a magnetic material, and appears as a frequency rearrangement of the multimode resonator, which depends resonantly on the external magnetic field. The rearrangement for the resonator with the ZnO film and YIG in the whole intermodal interval 3.6 MHz was experimentally observed. The observed effect is of interest to: a) the practical application of a tunable frequency control elements and microwave filters, b) study the magnetic dynamics in ferromagnetic films, c) new applications of microwave acoustic resonators.
75.85.+t Magnetoelectric effects, multiferroics
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