Voltage Control of Magnetism Through Two-Magnon Scattering Effect for Magnetoelectric Microwave Devices

摘要

Electric field control of dynamic spin interactions is promising to break through the limitation of the magnetostatic interaction-based magnetoelectric (ME) coupling effect. In this paper, electric field control of the two-magnon scattering (TMS) effect has been demonstrated in Ni_0.5Zn_0.5Fe₂O₄/Pb(Mn_2/3Nb_1/3)-PbTiO₃(001) multiferroic heterostructure. The TMS effect is an extrinsic magnetic damping mechanism that scatters the uniform spin motions excited by ferromagnetic resonance (FMR) into degenerate states of spin waves, offering a framework for voltage control of spin dynamics and further increase the ME effect. The angular dependence FMR measurement has been performed by the electron paramagnetic resonance spectrometer. A large electric field modulation of FMR field (-347 Oe) and FMR linewidth (275 Oe) is achieved at the TMS angle of θ_H= 60°. Particularly, the TMS effect contribute to ME coupling at the critical TMS angle is about 194% in magnitude compared with that of the strain effect-mediated ME coupling. The TMS intensity is increased by 14.5% under electric field at room temperature.