Giant electric-field-induced magnetization in a magnetoelectric composite at high frequency

Abstract

Electric-field-induced magnetization (EIM) characteristics are investigated in a small $0.68\left[\text{Pb}\left({\text{Mg}}_{1/3}{\text{Nb}}_{2/3}\right){\text{O}}_3\right]0.32{\text{PbTiO}}_3/\text{Terfenol-D}$ bilayered composite by using double coils in a wide frequency range of 10–700 kHz. The EIM behaviors are strongly dependent on driving electric field frequency, bias magnetic field, and angle $\theta$ between the bias magnetic field and polarization direction. The magnetoelectric coefficient at electromechanical resonance frequency of 185 kHz reaches up to $3.1\times {10}^{-7}\text{s}/\text{m}$ , which is $\sim 60$ times higher than the values at nonresonance frequency. The EIM variations with the bias magnetic field exhibit hysteresis, forming EIM hysteresis loops caused by the magnetostrictive hysteresis from Terfenol-D.