Terahertz Absorption Spectroscopy Study Of Spin Waves In Orthoferrite Yfeo(3 )In A Magnetic Field

We measured absorption of THz radiation in YFeO(3 )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 Gamma point with energies 1.2 meV (9.8 cm(-1)) and 2.4 meV (19.3 cm(-1)) 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.