Ferromagnetic resonance and the phase diagram of a 2D ferromagnet (CH3NH3)2CuCl4
Demokritov S. O. , Kreines N. M. , Kydinov V. I. , Petrov S. V.
The spectrum of the ferromagnetic resonance of a 2D ferromagnet (CH3NH3) 2CuCl4 is measured in a magnetic field perpendicular to the easy plane. The ΗΤ phase diagram is determined. The data obtained experimentally cannot be described in terms of the standard model for an easy-plane ferromagnet.