Abstract-Theoretical investigation of nonlinear damping and nonlinear phase shift of spin-electromagnetic waves propagating in infinite multiferroics at sub-terahertz frequencies

I A Ustinova, M A Cherkasskii, A B Ustinov and B A Kalinikos

Department of Physical Electronics and Technology, St.Petersburg Electrotechnical University, 5 Popov Street, St.Petersburg 197376, Russia

I A Ustinova et al 2015 J. Phys.: Conf. Ser. 661 012050

http://dx.doi.org/10.1088/1742-6596/661/1/012050
http://iopscience.iop.org/article/10.1088/1742-6596/661/1/012050/meta


The nonlinear phase shift and nonlinear damping of spin-electromagnetic waves were theoretically studied for the first time in sub-terahertz frequency range in infinite homogeneous longitudinal magnetized multiferroics. The research was based on the solution of the Ginzburg-Landau equation. It is shown that the saturation of the phase shift occurs due to the nonlinear damping if the nonlinear damping coefficients exceed v1=108 s-1 and v2=109 s-1.