Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 21: Poster I

MA 21.80: Poster

Dienstag, 13. März 2018, 09:30–13:00, Poster A

Efficient numerical relaxation of antiferromagnetic spin textures — •Andrew Fingers, Hristo Velkov, Matthias Sitte, Helen Gomonay, Daniele Pinna, Jairo Sinova, and Karin Everschor-Sitte — Johannes Gutenberg-Universität, Mainz, Germany

The literature is plentiful of both open source and commercial software for the analysis of ferromagnetic dynamics. Current approaches to antiferromagnetic systems simply modify the existing codes by either altering the sign of the exchange constant or only covering the dynamics of the staggered field in the large coupling limit. For antiferromagnetic systems, however, the situation is more complex due to the different energy and time scales involved. As an example, just modifying the sign of the exchange constant can lead to nontrivial numerical errors. Already the relaxation of an antiferromagnetic texture on its own is a complex task and the algorithms cannot just be transferred from the ferromagnetic case. We are developing a suite of solvers tailored for antiferromagnetic systems. We demonstrate a relaxation solver and apply it to the specific example of an antiferromagnetic skyrmion.