2019/10/17 by É. Méndez, M. Poluektov, G. Kreiss +2 · 1 citation
Physics and Astronomy · #cond-mat.mtrl-sci #nlin.PS #physics.comp-ph
paper · pdf · doi:10.1103/physrevresearch.2.013092
published as Phys. Rev. Research 2, 013092 (2020) · 9 pages, 7 figures and Supplementary information
arxiv created 2019/10/17 · arxiv updated 2020/02/05
Crystallographic lattice defects strongly influence dynamical properties of magnetic materials at both microscopic and macroscopic length scales. A multi-scale approach to magnetisation dynamics, which is presented in this paper, accurately captures such effects. The method is illustrated using examples of systems with localized, non-trivial topological properties, e.g. in the form of skyrmions and chiral domain walls that interact with lattice dislocations. Technical aspects of the methodology involve multi-scale magnetisation dynamics that connects atomistic and continuum descriptions. The technique is capable of solving the Landau-Lifshitz-Gilbert equations efficiently in two regions of a magnetic material --- the mesoscopic and the atomistic regions, which are coupled in a seamless way. It is demonstrated that this methodology allows simulating realistically-sized magnetic skyrmions interacting with material defects and novel physical effects, uncovered using this theoretical methodology, are described.