Inhomogeneous Magnetoelectric Effect on Defect in Multiferroic Material: Symmetry Prediction

TL;DR

This paper investigates how inhomogeneous magnetoelectric effects at lattice defects in multiferroic materials lead to specific electrical polarization distributions, using symmetry predictions and micromagnetic structure analysis.

Contribution

It introduces a symmetry-based prediction method for electrical polarization in defect-induced heterogeneities in multiferroics, emphasizing the role of micromagnetic chirality.

Findings

Magnetization heterogeneity induces electrical polarization regardless of symmetry.

All 0-degree domain walls with time-noninvariant chirality share similar polarization distributions.

The study systematizes results within the framework of micromagnetic structure chirality.

Abstract

Inhomogeneous magnetoelectric effect in magnetization distribution heterogeneities (0-degree domain walls) appeared on crystal lattice defect of the multiferroic material has been investigated. Magnetic symmetry based predictions of kind of electrical polarization distribution in their volumes were used. It was found that magnetization distribution heterogeneity with any symmetry produces electrical polarization. Results were systemized in scope of micromagnetic structure chirality. It was shown that all 0-degree domain walls with time-noninvariant chirality have identical type of spatial distribution of the magnetization and polarization.