Phase Field Crystal Model for Magneto-Elasticity in Isotropic Ferromagnetic Solids

TL;DR

This paper introduces a novel isotropic magneto-elastic phase field crystal model to explore the interplay between structure and magnetic properties in ferromagnetic solids, supported by analytical and numerical results.

Contribution

The paper presents a new PFC model for magneto-elasticity in isotropic ferromagnetic solids, linking morphology, magnetic domains, and grain boundary effects.

Findings

Grain boundaries serve as nucleation sites for magnetic domain reversal.

The phase diagram relates elastic strains to magnetization.

A derived relation connects coercivity with grain mis-orientation.

Abstract

A new isotropic magneto-elastic phase field crystal (PFC) model to study the relation between morphological structure and magnetic properties of pure ferromagnetic solids is introduced. Analytic calculations were used to determine the phase diagram and obtain the relationship between elastic strains and magnetization. Time dependent numerical simulations were used to demonstrate the effect of grain boundaries on the formation of magnetic domains. It was shown that the grain boundaries act as nucleating sites for domains of reverse magnetization. Finally, we derive a relation for coercivity versus grain mis-orientation in the isotropic limit.