Influence of the magnetoelectric coupling on the electric field induced magnetization reversal in a composite non-strained multiferroic chain

TL;DR

This paper theoretically investigates how magnetoelectric coupling influences electric field-induced magnetization reversal in a composite multiferroic chain, revealing conditions for hysteresis and stable reversal at GHz frequencies.

Contribution

It introduces a combined dynamic model for magnetization and polarization in a multiferroic system, highlighting the role of interface coupling in electric field-induced magnetization reversal.

Findings

Hysteresis in magnetization can be induced by electric fields.

Reversal modes depend on electric field frequency.

Magnetization reversal remains stable at 0.5-12 GHz.

Abstract

We study theoretically the multiferroic dynamics in a composite one-dimensional system consisting of BaTiO3 multiferroically coupled to an iron chain. The method treats the magnetization and the polarization as thermodynamic quantities describable via a combination of the Landau-Lifshits- Gilbert and the Ginzburg-Landau dynamics coupled via an additional term in the total free energy density. This term stems from the multiferroic interaction at the interface. For a wide range of strengths of this coupling we predict the possibility of obtaining a well-developed hysteresis in the ferromagnetic part of the system induced by an external electric field. The dependence of the reversal modes on the electric field frequency is also investigated and we predict a considerable stability of the magnetization reversal for frequencies in the range of 0.5 - 12 [GHz].