Magneto-electric effect in doped magnetic ferroelectrics

TL;DR

This paper introduces a Coulomb interaction-based model for the magneto-electric effect in doped magnetic ferroelectrics, highlighting its dependence on dielectric properties and electric fields, and analyzing its impact on magnetic phase behavior.

Contribution

The study presents a novel model of magneto-electric coupling that does not rely on spin-orbit interaction, focusing on Coulomb interactions in doped magnetic ferroelectrics.

Findings

Magneto-electric coupling is significant only in ferroelectrics with low dielectric constant.

Magnetization exhibits a peak near the ferroelectric phase transition.

Magnetization is strongly influenced by applied electric fields.

Abstract

We propose a model of magneto-electric effect in doped magnetic ferroelectrics. This magneto-electric effect does not involve the spin-orbit coupling and is based purely on the Coulomb interaction. We calculate magnetic phase diagram of doped magnetic ferroelectrics. We show that magneto-electric coupling is pronounced only for ferroelectrics with low dielectric constant. We find that magneto-electric coupling leads to modification of magnetization temperature dependence in the vicinity of ferroelectric phase transition. A peak of magnetization appears. We find that magnetization of doped magnetic ferroelectrics strongly depends on applied electric field.