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MA: Fachverband Magnetismus
MA 47: Altermagnets V
MA 47.10: Vortrag
Donnerstag, 12. März 2026, 17:30–17:45, HSZ/0002
Magnetic structure and the detwinning effect under applied magnetic field in the altermagnet α-MnTe — •Feihao Pan1, Yishui Zhou1, Sabreen Hammouda1, Yinghao Zhu1, Soohyeon Shin1, Karin Schmalzl2, Wolfgang Schmidt2, Eric Ressouche3, Oscar Ramon Fabelo Rosa4, and Yixi Su1 — 1Jülich Centre for Neutron Science (JCNS) at the Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich, Lichtenbergstrasse 1, D-85747 Garching, Germany — 2Jülich Centre for Neutron Science (JCNS) at ILL, Forschungszentrum Jülich, F-38000 Grenoble, France — 3IRIG, CEA and Université Grenoble Alpes, CEA Grenoble, F-38054 Grenoble, France — 4Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, France
Altermagnetism has garnered significant interest due to spin splitting without relativistic spin-orbit coupling and its promising applications in spintronics. We have recently carried out a detailed single-crystal neutron diffraction study of α-MnTe under applied in-plane magnetic field. We found that a moderate field can generate a strong detwinning effect of magnetic domains. The determination of the magnetic structure of α-MnTe, carried out under both the twined and detwinned conditions, allows us to conclude that the magnetic moment of Mn is indeed colinearly ordered and is uniquely aligned along the crystallographic [1,1,0] direction. This important finding can pave the way for future investigations of altermagnetic phenomena, such as chiral magnon splitting and unconventional spin transport, in α-MnTe under almost detwinned conditions via a wide range of experimental probes.
Keywords: altermagnet; magnetic domain; neutron diffraction; detwinning