Antiferromagnetic resonance in <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>α</mi><mtext>−</mtext><mi>MnTe</mi></mrow></math>

J. Dzian; P. Kubaščík; S. Tázlarů; M. Białek; M. Šindler; F. Le Mardelé; C. Kadlec; F. Kadlec; M. Gryglas-Borysiewicz; K. P. Kluczyk; A. Mycielski; P. Skupiński; J. Hejtmánek; R. Tesař; J. Železný; A.-L. Barra; C. Faugeras; J. Volný; K. Uhlířová; L. Nádvorník; M. Veis; K. Výborný; M. Orlita

doi:10.1103/bb6r-2nwz

Antiferromagnetic resonance in $α − MnTe$

J. Dzian ^1,2,*, P. Kubaščík ^2,*, S. Tázlarů ^2,3,*, M. Białek ⁴, M. Šindler ³, F. Le Mardelé¹, C. Kadlec ⁵, F. Kadlec ⁵, M. Gryglas-Borysiewicz ⁶ et al.

K. P. Kluczyk⁶, A. Mycielski ⁷, P. Skupiński ⁷, J. Hejtmánek ³, R. Tesař ³, J. Železný ³, A.-L. Barra¹, C. Faugeras¹, J. Volný ², K. Uhlířová ², L. Nádvorník ², M. Veis², K. Výborný ³, and M. Orlita ^1,2,†

¹LNCMI-EMFL, CNRS UPR3228, Université Grenoble Alpes, Grenoble, France
²Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, Prague, CZ-121 16 Czech Republic
³Institute of Physics, Academy of Science of the Czech Republic, Cukrovarnická 10, Prague 6, CZ-16253, Czech Republic
⁴Institute of High Pressure Physics, PAS, ul. Sokołowska 29/37, PL-01142 Warsaw, Poland
⁵Institute of Physics, Academy of Science of the Czech Republic, Na Slovance 2, CZ-182 00 Prague, Czech Republic
⁶Faculty of Physics, University of Warsaw, Pasteura 5, Warsaw, Poland
⁷Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland

^*These authors contributed equally to this work.
^†Contact author: milan.orlita@lncmi.cnrs.fr

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Phys. Rev. B 112, 024433 – Published 23 July, 2025

DOI: https://doi.org/10.1103/bb6r-2nwz

Abstract

Antiferromagnetic resonance in a bulk $α − MnTe$ crystal is investigated using both frequency-domain and time-domain THz spectroscopy techniques. At low temperatures, an excitation at the photon energy of $(3.5 \pm 0.1)$ meV is observed and identified as a magnon mode through its distinctive dependence on temperature and magnetic field. This behavior is reproduced using a simplified model for antiferromagnetic resonance in an easy-plane antiferromagnet. The results of our experiments, when compared with exchange constants established in the literature, allow us to extract the out-of-plane component of the single-ion magnetic anisotropy reaching $(40 \pm 10) µ eV$ .

Physical Review B

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Antiferromagnetic resonance in $α − MnTe$

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Antiferromagnetic resonance in α−MnTe

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Antiferromagnetic resonance in $α − MnTe$