Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 7: Poster Magnetism I
MA 7.33: Poster
Montag, 9. März 2026, 09:30–12:30, P2
Magnetic Phases in ErFeO3 — •Leo Maximov1,3, Thomas Reyher1, Florian Kübelbäck1,3, Johanna Jochum2, Andreas Bauer1,3, and Christian Pfleiderer1,2,3 — 1School of Natural Science, Physik-Department, Technical University of Munich, Garching, Germany — 2Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, Garching, Germany — 3Zentrum für QuantumEngineering (ZQE), Technical University of Munich, Garching, Germany
Rare-earth orthoferrites (RFeO3) have been extensively studied for their multiferroic properties [1,2]. Most recently, in ErFeO3, a central motivation has been the observation of Dicke cooperativity in magnetic interactions [3], suggesting that collective coupling between localized moments and excitations can strongly alter spin dynamics. Such cooperative effects may influence magnon dispersion near crystal-field levels. Neutron studies provided Fe3+ spin-wave dispersions [4], and revealed hybrid spin-wave and crystal-field excitations [5]. However, a systematic mapping of the full spin-wave dispersion, as well as possible cooperative effects, remains lacking. We report single-crystal growth of ErFeO3 using the optical floating-zone method. Structural quality was verified by single-crystal Laue and powder X-ray diffraction. Measurements of the magnetization and the heat capacity allow us to establish the anisotropic magnetic phase diagram as a prerequisite for further studies. [1] Y.Ke, et al., Sci. Rep. 6, 19775 (2016). [2] R.L. White, JAP 40, 1061 (1969). [3] Li, Xinwei, et al. Science 361.6404 (2018). [4] Shapiro Physical Review B 10.5 (1974). [5] Zic, et al., J. Appl. Phys. 130, 014102 (2021).
Keywords: magnetic phase transition; spin reorientation; magnetic phase diagram