Electric field tuning characteristics of a ferrite-piezoelectric microwave resonator

The fabrication and characterization of an electric field-tunable yttrium iron garnet (YIG)-lead zirconate titanate (PZT) microwave resonator are discussed. The device is based on ferromagnetic resonance for YIG. The tunability is accomplished through magnetoelectric interactions. For an electric field E=10 kV/cm across PZT, a frequency shift of 18-25 MHz that was an order of magnitude higher the frequency width of the absorption profile for the resonator was measured. Upon reversal of the direction of E, the shift also reversed. The YIG-PZT bilayer structures could form the basis for rapid, electric field tunable, passive microwave resonators and filters. (c) 2006 American Institute of Physics.