Computational micromagnetics with Commics

Cited by 9 publications

(2 citation statements)

References 71 publications

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“…For materials with nonlinear MEL property such as MnSi, we performed finite element analysis (FEA) of the problem (1) using the Commics (COmputational Mi-croMagnetICS) code [27], modified to include the MEL field (4). We are not aware of any micromagnetic codes, which are capable of calculating the nonlinear MEL effects.…”

Section: B Uniaxial and Biaxial Strain In Isotropic Materialsmentioning

confidence: 99%

Deterministic strain-control of stability and current-induced motion of skyrmions in chiral magnets

Ong¹,

Kim²,

Zhao³

et al. 2020

Preprint

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External magnetic field, temperature, and spin-polarized current are usually employed to create and control nanoscale vortex-like spin configurations such as magnetic skyrmions. Although these methods have proven successful, they are not energy-efficient due to high power consumption and dissipation. Coupling between magnetic properties and mechanical deformation, the magnetoelastic (MEL) effect, offers a novel approach to energy-efficient control of magnetism at the nanoscale. It is of great interest in the context of ever-decreasing length scales of electronic and spintronic devices. Therefore, it is desirable to establish a comprehensive framework capable of predicting effects of mechanical stress and enabling deterministic control of magnetic textures and skyrmions. In this work, using an advanced scheme of multiscale simulations and Lorentz transmission electron microscopy measurements we demonstrate deterministic control of topological magnetic textures and skyrmion creation in thin films and racetracks of chiral magnets. Our investigation considers not only uniaxial but also biaxial stress, which is ubiquitous in thin-film devices. The biaxial stress, rather than the uniaxial one, was shown to be more efficient to create or annihilate skyrmions when the MEL coefficient and strain have the same or opposite signs, respectively. It was also demonstrated to be a viable way to stabilize skyrmions and to control their current-induced motion in racetrack memory. Our results open prospects for deployment of mechanical stress to create novel topological spin textures, including merons, and in control and optimization of skyrmion-based devices.

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Section: B Uniaxial and Biaxial Strain In Isotropic Materialsmentioning

confidence: 99%

Deterministic strain-control of stability and current-induced motion of skyrmions in chiral magnets

Ong¹,

Kim²,

Zhao³

et al. 2020

Preprint

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show abstract

“…Before proceeding with the convergence analysis, we aim to show the effectivity of the proposed algorithms with three numerical experiments. The computations presented in this section have been performed with our micromagnetic software Commics [1,51]. Our Python code is based on the open-source finite element library Netgen/NGSolve [2].…”

Section: Numerical Experimentsmentioning

confidence: 99%

Convergent tangent plane integrators for the simulation of chiral magnetic skyrmion dynamics

et al. 2019

Self Cite

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We consider the numerical approximation of the Landau-Lifshitz-Gilbert equation, which describes the dynamics of the magnetization in ferromagnetic materials. In addition to the classical micromagnetic contributions, the energy comprises the Dzyaloshinskii-Moriya interaction, which is the most important ingredient for the enucleation and the stabilization of chiral magnetic skyrmions. We propose and analyze three tangent plane integrators, for which we prove (unconditional) convergence of the finite element solutions towards a weak solution of the problem. The analysis is constructive and also establishes existence of weak solutions. Numerical experiments demonstrate the applicability of the methods for the simulation of practically relevant problem sizes.

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Unconditional well-posedness and IMEX improvement of a family of predictor-corrector methods in micromagnetics

Mauser

Pfeiler

Praetorius

et al. 2022

Applied Numerical Mathematics

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Computational micromagnetics with Commics

Cited by 9 publications

References 71 publications

Deterministic strain-control of stability and current-induced motion of skyrmions in chiral magnets

Deterministic strain-control of stability and current-induced motion of skyrmions in chiral magnets

Convergent tangent plane integrators for the simulation of chiral magnetic skyrmion dynamics

Unconditional well-posedness and IMEX improvement of a family of predictor-corrector methods in micromagnetics

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