Dynamic Response in a Finite Size Composite Multiferroic Thin Film
Zidong Wang, Malcolm J. Grimson
TL;DR
This paper investigates the dynamic magnetization switching in a finite-size composite multiferroic thin film using stochastic modeling, revealing domain wall behavior under electric field influence.
Contribution
It introduces a stochastic Landau-Lifshitz-Gilbert approach to study electric-field-induced magnetization switching in finite multiferroic thin films, focusing on domain wall dynamics.
Findings
Electric field can switch magnetization in the composite film.
Domain wall behavior is influenced by boundary conditions.
Finite size effects are significant in the response.
Abstract
Composite multiferroics, heterostructures of ferromagnetic (FM) and ferroelectric (FE) materials, are characterized by a remarkable magnetoelectric effect at the interface. Previous work has supported the ferromagnetic structure with magnetic spins and the ferroelectric with pseudospins which act as electric dipoles in a microscopic model, coupled with a magnetoelectric interaction [J. Appl. Phys. 118, 124109 (2015)]. In this work, by solving the stochastic Landau-Lifshitz-Gilbert equation, the electric-field-induced magnetization switching in a twisted boundary condition has been studied, and a behavior of domain wall in the ferromagnetic structure is discussed.
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