Abstract
We measured absorption of THz radiation in single crystals at a temperature of 3 K in the magnetic field up to 17 T applied in all three crystallographic directions. Two spin-wave modes were observed at the point with energies 1.2 meV (9.8 ) and 2.4 meV (19.3 ) in zero field. From the magnetic-field dependence of mode energies, we have refined the previously proposed model [S. E. Hahn et al., Phys. Rev. B 89, 014420 (2014)] and quantified the parameters of Dzyaloshinskii-Moriya interactions and single-ion anisotropies.
- Received 4 September 2018
DOI:https://doi.org/10.1103/PhysRevB.98.174417
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Published by the American Physical Society