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

Paul Heistracher; Claas Abert; Florian Bruckner; Thomas Schrefl; Dieter Suess

doi:10.1016/j.jmmm.2021.168875

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

Paul Heistracher (Corresponding author)
, Claas Abert
, Florian Bruckner
, Thomas Schrefl
, Dieter Suess

Physics of Functional Materials

Publications: Contribution to journal › Article › Peer Reviewed

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.

Original language	English
Article number	168875
Number of pages	8
Journal	Journal of Magnetism and Magnetic Materials
Volume	548
Early online date	31 Dec 2021
DOIs	https://doi.org/10.1016/j.jmmm.2021.168875
Publication status	Published - 15 Apr 2022

Funding

The financial support by the Austrian Science Fund (FWF) under grant No. I4917 , the Austrian Federal Ministry for Digital and Economic Affairs , the National Foundation for Research, Technology and Development , and the Christian Doppler Research Association is gratefully acknowledged.

Austrian Fields of Science 2012

103015 Condensed matter
103043 Computational physics

Keywords

Domain wall pinning
Exchange discontinuity
Micromagnetics
Multiphase material
Standard problem

Access to Document

10.1016/j.jmmm.2021.168875Licence: CC BY 4.0

https://phaidra.univie.ac.at/o:1594000Licence: CC BY 4.0
https://arxiv.org/abs/2107.07855Licence: Other

Cite this

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title = "Proposal for a micromagnetic standard problem: Domain wall pinning at phase boundaries",

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.",

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AU - Schrefl, Thomas

AU - Suess, Dieter

N1 - Funding Information: The financial support by the Austrian Science Fund (FWF) under grant No. I4917 , the Austrian Federal Ministry for Digital and Economic Affairs , the National Foundation for Research, Technology and Development , and the Christian Doppler Research Association is gratefully acknowledged. Publisher Copyright: © 2021 The Authors Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

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N2 - 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.

AB - 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.

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KW - Exchange discontinuity

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KW - Standard problem

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

Abstract

Funding

Austrian Fields of Science 2012

Keywords

Access to Document

Other files and links

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MagFunc: Non-Reciprocal 3D Architectures for Magnonic Functionalities

CD-Labor Advanced Magnetic Sensing and Materials

Cite this

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

Abstract

Funding

Austrian Fields of Science 2012

Keywords

Access to Document

Other files and links

Fingerprint

Projects

MagFunc: Non-Reciprocal 3D Architectures for Magnonic Functionalities

CD-Labor Advanced Magnetic Sensing and Materials

Cite this