G. Hrkac, C.-M. Pfeiler, D. Praetorius, M. Ruggeri, A. Segatti, B. Stiftner:

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

in: "ASC Report 29/2017", issued by: Institute for Analysis and Scientific Computing; Vienna University of Technology, Wien, 2017, ISBN: 978-3-902627-10-0, 1 - 32.

We consider the numerical approximation of the Landau-Lifshitz-Gilbert equa-tion, which describes the dynamics of the magnetization in ferromagnetic materials. In addi-tion 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.

Dzyaloshinskii-Moriya interaction, Finite element method, Landau-Lifshitz-Gilbert equation, Magnetic skyrmions,

http://www.asc.tuwien.ac.at/preprint/2017/asc29x2017.pdf

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