Strain coupling optimization in magnetoelectric transducers

TL;DR

This paper models the mechanical behavior of magnetoelectric transducers, analyzing how aspect ratio and surrounding layers influence strain, and proposes strategies to optimize strain magnitude and orientation through design and material choices.

Contribution

It introduces a comprehensive model for magnetoelectric transducers considering various layers and provides strategies for strain optimization based on design and material selection.

Findings

Aspect ratio significantly affects strain magnitude and orientation.

Surrounding layers influence the mechanical coupling and strain transfer.

Design strategies can enhance strain control in transducer performance.

Abstract

The mechanical behavior of magnetoelectric transducers consisting of piezoelectric-magnetostrictive bilayers has been modeled. The effect of the aspect ratio of the transducer as well as the influence of non-active surrounding layers has been modeled, including a passivation layer surrounding the active device, a clamping layer above the active device, and an interfacial layer that might be inserted between the magnetostrictive and the piezoelectric layers. Strategies to control and maximize the strain magnitude and orientation based on material selection and device design are proposed.