(1) Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russia;(2) Krasnoyarsk State University, pr. Svobodnyi 79, Krasnoyarsk, 660041, Russia
Abstract:
The nonlinear microwave absorption in the (CH3NH3)2CuBr4 antiferromagnetic crystal is investigated experimentally. The temperature and angular dependences of the parameters of nonlinear resonance and the dependences of these parameters on the microwave pump power are analyzed. It is found that the nonlinear properties deteriorate with decreasing temperature and the linear and nonlinear contributions are competitive in character.