Effect of Structural Control on the Magnetoelectric Characteristics of Piezoelectric–Magnetostrictive Laminate Composite in Resonance and Off-Resonance Modes

Abstract

In this study, it is reported that the magnetoelectric (ME) performance in the resonance mode and that in the off-resonance mode are reversed depending on the thickness fraction of the piezoelectric layer in a ME laminate composite composed of piezoelectric and magnetostrictive layers. The ME performance in the resonance mode increased as the thickness fraction of the piezoelectric layer was increased, while the ME performance in the off-resonance mode decreased. Based on the impedance spectrum analysis of fabricated ME laminate samples, it was confirmed that the thickness fraction of the piezoelectric layer had a significant influence on the mechanical loss of the device. The phase angle change and the mechanical quality factor at the anti-resonance frequency of the ME laminate were found to be useful for predicting the ME performance in the resonance mode. High aspect ratio of the laminate was favorable in both resonance and off-resonance modes.