Modeling of Magnetoelectric Effects in Ferromagnetic/Piezoelectric Bulk Composites

TL;DR

This paper presents a comprehensive model for bulk ferromagnetic/piezoelectric composites, deriving effective parameters and magnetoelectric coefficients, and analyzing the effects of connectivity and clamping on their behavior.

Contribution

It introduces a unified model considering both piezoelectric and magnetostrictive subsystems to predict magnetoelectric effects in bulk composites with different connectivities.

Findings

Derived expressions for magnetoelectric voltage coefficients in various connectivities.

Identified the impact of clamping on magnetoelectric coefficients.

Compared theoretical predictions with experimental data.

Abstract

We discuss a model that considers the bulk composite as a homogeneous medium with piezoelectric and magnetostrictive subsystems. We solve combined elastostatic, electrostatic and magnetostatic equations to obtain effective composite parameters (piezoelectric modules, magnetostriction factors, compliances, magnetoelectric coefficients) for 3-0 and 0-3 connectivities. Expressions for longitudinal and transverse low-frequency magnetoelectric voltage coefficients have been obtained for unclamped and clamped samples. Volume fractions for peak low-frequency effective magnetoelectric voltage coefficient are found to be dependent on specific connectivity. Clamping leads to significant variation in magnetoelectric voltage coefficients. The calculated magnetoelectric coefficients are compared with data.