Electric field tuning of domain magnetic resonances in yttrium iron garnet films

Abstract

The converse magnetoelectric effect is studied by voltage tuning of magnetic resonance in a bilayer of (111) yttrium iron garnet (YIG) film and polycrystalline lead zirconate titanate (PZT) when the YIG film is in a multi-domain state or under magnetic saturation. The application of a DC voltage across PZT manifests as a uniaxial anisotropy field in YIG and results in a shift in the resonance. In the multi-domain state, the voltage tuning of resonance is strong with a magneto-electric coefficient A = 12 MHz cm/kV. Under magnetic saturation, the voltage tuning is rather weak with A = 2 MHz cm/kV.