Magneto-Electric Effect for Multiferroic Thin Film by Monte Carlo Simulation

TL;DR

This study uses Monte Carlo simulations to explore how an external magnetic field influences polarization in a multiferroic heterostructure, revealing the dynamic magneto-electric coupling at the interface.

Contribution

It introduces a simulation approach combining Heisenberg and pseudo-spin models to analyze magneto-electric effects in thin films with linear interfacial coupling.

Findings

Polarization responds dynamically to external magnetic fields.

Magneto-electric coupling influences electric polarization.

Simulation results demonstrate interface-driven effects.

Abstract

Magneto-electric effect in a multiferroic heterostructure film, i.e. a coupled ferromagnetic-ferroelectric thin film, has been investigated through the use of the Metropolis algorithm in Monte Carlo simulations. A classical Heisenberg model describes the energy stored in the ferromagnetic film, and we use a pseudo-spin model with a transverse Ising Hamiltonian to characterise the energy of electric dipoles in the ferroelectric film. The purpose of this article is to demonstrate the dynamic response of polarisation is driven by an external magnetic field, when there is a linear magneto-electric coupling at the interface between the ferromagnetic and ferroelectric components.