Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 8: Altermagnets II
MA 8.3: Talk
Monday, March 9, 2026, 15:30–15:45, HSZ/0002
Studying altermagnetism with muon-spin spectroscopy — •Thomas Hicken1, Jonas Kreiger1, Jennifer Graham1, Zurab Guguchia1, Franziska Walther2, Kristin Kliemt2, Cornelius Krellner2, Helena Reichlova3, Klára Uhlírová4, Juraj Krempaský1, Nirmal Ghimire5, and Hubertus Luetkens1 — 1PSI, Switzerland — 2Goethe-Universität Frankfurt, Germany — 3Czech Academy of Science, Czech Republic — 4École Polytechnique Fédérale de Lausanne, Switzerland — 5University of Notre Dame, USA
With properties of both ferro- and antiferro-magnets, altermagnetism is of interest for fundamental physics and spintronic applications. Understanding the magnetic structure, and hence magnetic symmetries, is of utmost importance. Further, it has been suggested that altermagnets may have unique dynamic fluctuations. To answer these questions, muon spin spectroscopy (µSR) measurements provide information that is complementary to, and unique from, other probes. I will discuss how we are using µSR to probe a number of materials, including Co1/4NbSe2 [1], a proposed g-wave altermagnet, Ce4Sb3, which shows promise as an altermagnet with 4f moments, and MnTe [2], which is perhaps the best studied altermagnet so far. Our measurements, combined with muon stopping site calculations, reveal the sometimes unexpected magnetic structure of candidate altermagnetic materials, and test some of the key predictions of altermagnetism.
[1] J. N. Graham, T. J. Hicken et al., arXiv:2503.09193 (2025).
[2] T. J. Hicken et al., arXiv:2507.14710 (2025).
Keywords: muon spin spectroscopy; altermagnetism; magnetic structure; magnetic dynamics