Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 2: Altermagnets I
MA 2.6: Talk
Monday, March 9, 2026, 10:45–11:00, HSZ/0004
Magnetization processes and spin-lattice coupling in the hexagonal easy-plane altermagnet α-MnTe — •Sahana Rößler1, Victoria Ginga1, Ece Uykur2, Yurii Skourski3, Jeremy Sourd3, Sergei Zherlitsyn3, Marcus Schmidt4, Yurii Prots4, Helge Rosner4, Ulrich Burkhardt4, Ulrich K. Rößler5, and Alexander A. Tsirlin1 — 1Felix Bloch Institute for Solid State Physics, Leipzig University, Leipzig, Germany — 2HZDR, IBP and Materials Research, Dresden, Germany — 3HLD, HZDR, Dresden, Germany — 4MPI CPfS, Dresden, Germany — 5Institute for Theoretical Solid-State Physics, Leibniz IFW Dresden, Germany
We investigated the magnetization dynamics associated with domain behavior in α-MnTe using magnetization, magnetostriction, sound velocity, and attenuation measurements. Angle- and field-dependent magnetization data reveal complex magnetic responses with a distinct anomaly around 1 T, reflecting domain-related processes. Magnetostriction and elastic constant measurements indicate strong lattice effects at the field-induced reorientation transition. These features were analysed using a phenomenological micromagnetic model incorporating higher-order anisotropic exchange interactions that couple the weak ferromagnetic component to the antiferromagnetic order parameter. The model successfully reproduces the generic behaviour of the magnetic states and demonstrates that the observed uniaxial and unidirectional anisotropies arise from metastable domain configurations and irreversible magnetization processes [1].
[1] S. Rößler et al., arXiv:2511.01388
Keywords: Magnetization; Magnetostriction; Sound Velocity and attenuation; micromagnetic model; domain processes