Field sweep rate dependence of magnetic domain patterns: Numerical simulations for a simple Ising-like model

TL;DR

This paper uses numerical simulations of a simple Ising-like model to explore how magnetic domain patterns in ferromagnetic thin films depend on the field sweep rate, revealing various pattern types and proposing a formation criterion.

Contribution

It introduces a numerical simulation approach to analyze the dependence of magnetic domain patterns on field sweep rate and model parameters, providing a formation criterion.

Findings

Different domain patterns emerge depending on sweep rate and parameters.

The number of domains and their size distributions vary with conditions.

A criterion for domain pattern structure based on proper system time scale.

Abstract

We study magnetic domain patterns in ferromagnetic thin films by numerical simulations for a simple Ising-like model. Magnetic domain patterns after quench demonstrate various types of patterns depending on the field sweep rate and parameters of the model. How the domain patterns are formed is shown with use of the number of domains, the domain area, and domain area distributions as well as snapshots of domain patterns. Considering the proper time scale of the system, we propose a criterion for the structure of domain patterns.