Proposal for a micromagnetic standard problem: Domain wall pinning at phase boundaries

Author(s)
Paul Heistracher, Claas Abert, Florian Bruckner, Thomas Schrefl, Dieter Suess
Abstract

We propose a novel micromagnetic standard problem calculating the coercive field for unpinning a domain wall at the interface of a multiphase magnet. This problem is sensitive to discontinuities in material parameters for the exchange interaction, the uniaxial anisotropy, and the spontaneous magnetization. We derive an explicit treatment of jump conditions at material interfaces for the exchange interaction in the finite-difference discretization. The micromagnetic simulation results are compared with analytical solutions and show good agreement. The proposed standard problem is well-suited to test the implementation of both finite-difference and finite-element simulation codes.

Organisation(s)
Physics of Functional Materials
External organisation(s)
Donau-Universität Krems, Christian-Doppler-Forschungsgesellschaft
Journal
Journal of Magnetism and Magnetic Materials
Volume
548
No. of pages
8
ISSN
0304-8853
DOI
https://doi.org/10.1016/j.jmmm.2021.168875
Publication date
12-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103015 Condensed matter, 103043 Computational physics
Keywords
ASJC Scopus subject areas
Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Portal url
https://ucris.univie.ac.at/portal/en/publications/proposal-for-a-micromagnetic-standard-problem-domain-wall-pinning-at-phase-boundaries(f9976bed-c805-460b-913b-d4225d4ad0d3).html