Long-wave IR spectrum of CoCO3 - high-frequency mode of antiferromagnetic resonance (AFMR) and two-magnon absorption
Naumenko V.M., Eremenko V.V., Maslennikov A.I., Kovalenko A.V.
For the first time ever, we have observed in C0CO3 a high-frequency AFMR mode and two-magnon absorption, and we have measured the shift of the two-magnon absorption line in the magnetic field Я. For a satisfactory description of the AFMR it is necessary to calculate the frequencies accurate to terms of second order in H.