Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 13: Altermagnets II
MA 13.3: Talk
Tuesday, March 18, 2025, 10:00–10:15, H20
New altermagnetic material candidates showing 4f-magnetism — •Franziska Walther1, Johannes Fey1, Michelle Ocker1, Libor Šmejkal2,3, Cornelius Krellner1, and Kristin Kliemt1 — 1Physikalisches Institut, Goethe-Universität 60438 Frankfurt/Main — 2Max Planck Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, 01187 Dresden — 3Institut für Physik, Johannes Gutenberg Universität Mainz, 55099 Mainz
Altermagnets are a novel class of collinear magnetic materials, which are characterised by a vanishing net magnetization while breaking the time-reversal symmetry in the electronic band structure with a unique alternating spin-momentum locking [1]. So far, altermagnetism has been proven for magnetic 3d-systems such as CrSb [2], MnTe [3] and Mn5Si3 [4] by the time-reversal breaking signature in the band structure or the observation of the anomalous Hall effect.
In order to study the altermagnetism arising from local 4f moments, we have grown single crystals of lanthanoid-based intermetallic compounds and characterised their physical and chemical properties. We report on the crystal growth and measurements of magnetism, heat capacity and resistivity of the altermagnetic candidates.
[1] L. Šmejkal et al., Phys. Rev. X 12, 031042 (2022)
[2] S. Reimers et al., Nat. Commun. 15, 2116 (2024)
[3] J. Krempaský et al., Nature 626, 517 (2024)
[4] H. Reichlova et al., Nat. Commun. 15, 4961 (2024)
Keywords: Altermagnets; 4f systems; Correlated electrons; crystal growth