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arXiv · 2604.15454

Simulating altermagnets using mumax+

Lars Moreels·Nicolai Bechler·Bartel Van Waeyenberge·Jonathan Leliaert·Jan Masell
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Abstract

In this paper, we demonstrate how altermagnets can be simulated in the recently released micromagnetic simulation package mumax+. We have added a new magnet class for d-wave altermagnets and demonstrate how mumax+ is able to reproduce the analytical solutions for line profiles of the N\'eel vector and net magnetization for a Bloch domain wall. Next, we show simulation results of the magnon dispersion relation and its dependence on the anisotropic nature of the exchange interaction. Finally, we study the motion of a N\'eel skyrmion by applying a spin transfer torque. This new feature was implemented by extending the pre-existing code base for antiferromagnetic simulations. The object-oriented design of mumax+ allows for a correct calculation of the magnetostatic field in multi-sublattice systems, a feature that many other micromagnetic simulators lack.

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Lars Moreels, Nicolai Bechler, Bartel Van Waeyenberge, Jonathan Leliaert, Jan Masell. 2026-04-16. Simulating altermagnets using mumax+. https://arxiv.org/abs/2604.15454

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