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This paper reports the experimental results on resonance frequency tuning of a single crystal M-type hexaferrite resonators with an applied current. The tuning arises from nonlinear magnetoelectric interaction which changes both saturation magnetization and uniaxial anisotropy field. Frequency shifts up to ∼400 MHz for samples in the saturated state and ∼300 MHz in the multi-domain state were measured...
The review of magnetodynamic resonances in ferrite resonators and their mm-wave band applications was given. Ferrite resonator eigenexcitations classification has been presented. The analytical theory for modes resonant frequencies calculations is stated and a number of prototype electronically tunable mm-wave devices, utilizing the “above” and “below FMR” magnetodynamic resonances, including isolator,...
Magnetic field tuning characteristics of a single-crystal barium hexaferrite dielectric resonator in the frequency range 75-110 GHz are reported. The dielectric resonances occur at a much higher frequency than the ferromagnetic resonance. It is shown that the degeneracy in the dielectric mode is lifted with an applied magnetic field H and that the modes can be tuned by 10 GHz or more with H. The dielectric...
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