Antiferromagnetic resonance in $\alpha$-MnTe

Abstract

Antiferromagnetic resonance in a bulk $\alpha$-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 to exchange constants established in the literature, allow us to extract the out-of-plane component of the single-ion magnetic anisotropy reaching $(40\pm 10)$~$\mu$eV.

arXiv comment12 pages, 7 figures

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Cited by in corpus (7)

• Dominant orbital magnetization in the prototypical altermagnet MnTe
• Cavity-induced coherent magnetization and polaritons in altermagnets
• Relativistic Spin-momentum locking in altermagnets
• Revisiting the symmetry and optical phonons of altermagnetic $\alpha$-MnTe
• Strain-tunable anomalous Hall effect in hexagonal MnTe
• Altermagnetism from the viewpoint of chemistry
• Pseudo-Goldstone mode in altermagnetic $\alpha$-MnTe: high-field electron spin resonance studies