Dynamic converse magnetoelectric effect in ferromagnetic nanostructures with electric-field-dependent interfacial anisotropy

Magnetization oscillations excited by microwave voltages in ferromagnetic nanostructures having electric-field-dependent interfacial anisotropy are described theoretically. By calculating frequency dependencies of complex susceptibilities we show that this dynamic magnetoelectric effect acquires anomalous characteristics near thickness-induced spin reorientation transitions (SRTs) in nanolayers of cubic ferromagnets. Most importantly, the peak magnetoelectric susceptibilities may reach giant values exceeding 10(-6) s/m, and the tunability of the resonance frequency of the magnetization precession by a dc voltage increases drastically near the critical thickness or voltage inducing an SRT.