Polarization and magnetization dynamics of a field-driven multiferroic structure

TL;DR

This paper investigates the dynamic behavior of a multiferroic chain under external fields, demonstrating controllability of polarization and magnetization through theoretical modeling and simulations.

Contribution

It introduces a coupled Landau-Khalatnikov and Landau-Lifshitz-Gilbert approach to analyze multiferroic dynamics, including comparison with Monte Carlo methods.

Findings

Polarization and magnetization are controllable by external fields.

Theoretical results align with Monte Carlo simulations.

Material parameters for BaTiO3/Fe are used for modeling.

Abstract

We consider a multiferroic chain with a linear magnetoelectric coupling induced by the electrostatic screening at the ferroelectric/ferromagnet interface. We study theoretically the dynamic ferroelectric and magnetic response to external magnetic and electric fields by utilizing an approach based on coupled Landau- Khalatnikov and finite-temperature Landau-Lifshitz-Gilbert equations. Additionally, we compare with Monte Carlo calculations. It is demonstrated that for material parameters corresponding to BaTiO3/Fe the polarization and the magnetization are controllable by external magnetic and electric fields respectively.