Spin Dynamics in Driven Composite Multiferroics

TL;DR

This paper employs a spin dynamics approach to explore the behavior of magnetic and electric pseudo-spins in a 1-D and 2-D composite multiferroic system under external fields, incorporating thermal effects.

Contribution

It introduces a detailed spin dynamics model for composite multiferroics, including thermal noise and a 2-D ladder model for interface magneto-electric effects.

Findings

Magnetic and electric spins respond differently to external fields.

Thermal noise influences spin dynamics significantly.

The 2-D ladder model reveals complex interface behaviors.

Abstract

A spin dynamics approach has been used to study the behavior of the magnetic spins and the electric pseudo-spins in a 1-D composite multiferroic chain with a linear magneto-electric coupling at the interface. The response is investigated with either external magnetic or electric fields driving the system. The spin dynamics is based on the Landau-Lifshitz-Gilbert equation. A Gaussian white noise is later added into the dynamic process to include the thermal effects. The interface requires a closer inspection of the magneto-electric effects. Thus, we construct a 2-D ladder model to describe the behavior of the magnetic spins and the electric pseudo-spins with different magneto-electric couplings.