Controlling magnetic anisotropy in amplitude expansion of phase field crystal model

2022/10/30 by Rainer Backofen, Backofen, Rainer, Marco Salvalaglio +3
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties and Applications #Materials Science (cond-mat.mtrl-sci) #Solidification and crystal growth phenomena #Theoretical and Computational Physics

paper · pdf · doi:10.48550/arxiv.2210.16855

openalex publication_date 2022/10/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The amplitude expansion for a magnetic phase-field-crystal (magnetic APFC) model enables a convenient coarse-grained description of crystalline structures under the influence of magnetic fields. Considering higher-order magnetic coupling terms, we demonstrate the possibility of tuning the magnetic anisotropy in these models. This allows for reproducing the easy and hard direction of magnetization. Such a result can be achieved without increasing the computational cost, enabling simulations of the manipulation of dislocation networks and microstructures in ferromagnetic materials. As a demonstration, we report on the simulation of the shrinkage of a spherical grain with the magnetic anisotropy of Fe.

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