Chaotic microwave self-generation in active rings based on ferromagnetic films

The phenomenon of chaotic microwave self-generation under conditions of a four-wave parametric spin wave interaction in active resonance rings based on ferromagnetic films has been studied for the first time. It is shown that microwave signals of various types-in particular, monochromatic, stationary soliton-like pulse trains, and dynamic chaos-can be generated by controlling the gain level in the active ring. Parameters characterizing the chaotic signal generated in the ring are determined.