Resonance magnetoelectric effects in layered magnetostrictive-piezoelectric composites

TL;DR

This paper investigates the resonance magnetoelectric effect in layered magnetostrictive-piezoelectric composites, demonstrating significant enhancement of ME coupling at electromechanical resonance through both theory and experiments.

Contribution

It provides a theoretical framework and experimental validation for giant ME effects at EMR in ferrite-PZT bilayers, highlighting the potential for improved field conversion efficiency.

Findings

ME voltage coefficient increases 40-600 times at EMR

Cobalt ferrite-PZT exhibits the highest coupling

Theoretical profiles match experimental data

Abstract

Magnetoelectric interactions in bilayers of magnetostrictive and piezoelectric phases are mediated by mechanical deformation. Here we discuss the theory and companion data for magnetoelectric (ME) coupling at electromechanical resonance (EMR) in a ferrite-lead zirconate titanate (PZT) bilayer. Estimated ME voltage coefficient versus frequency profiles for nickel, cobalt, or lithium ferrite and PZT reveal a giant ME effect at EMR with the highest coupling expected for cobalt ferrite-PZT. Measurements of resonance ME coupling have been carried out on layered and bulk composites of nickel ferrite-PZT. We observe a factor of 40-600 increase in ME voltage coefficient at EMR compared to low frequency values. Theoretical ME voltage coefficients versus frequency profiles are in excellent agreement with data. The resonance ME effect is therefore a novel tool for enhancing the field conversion efficiency in the composites.