Converse Magnetoelectric Experiments on a Room Temperature Spirally Ordered Hexaferrite

TL;DR

This study investigates the magnetoelectric properties of Sr3Co2Fe24O41 hexaferrite at room temperature, revealing symmetry-breaking features and proposing a physical model to explain its magnetoelectric behavior.

Contribution

It provides experimental measurements of magnetoelectric effects in a specific hexaferrite and introduces a simple physical model for understanding these effects.

Findings

Measured magnetic permeability, magnetization, and strain as functions of electric and magnetic fields

Identified broken symmetries in the material for time reversal and parity

Proposed a physical model explaining the magnetoelectric effect

Abstract

Experiments have been performed to measure magnetoelectric properties of room temperature spirally ordered Sr3Co2Fe24O41 hexaferrite slabs. The measured properties include the magnetic permeability, the magnetization and the strain all as a function of the electric field E and the magnetic intensity H. The material hexaferrite Sr3Co2Fe24O41 exhibits broken symmetries for both time reversal and parity. The product of the two symmetries remains unbroken. This is the central feature of these magnetoelectric materials. A simple physical model is proposed to explain the magnetoelectric effect in these materials.