Chaotic Spin-Wave Solitons in Magnetic Film Feedback Rings
  Chaotic spin-wave solitons in magnetic film active feedback rings were observed for the first time. At some ring gain level, one observes the self-generation of a single spin-wave soliton pulse in the ring. When the pulse circulates in the ring, its amplitude varies chaotically with time. Numerical simulations based on a gain-loss nonlinear Schr\"odinger equation reproduce the observed responses. 
Zihui Wang, Aaron Hagerstrom, Justin Q. Anderson, Wei Tong, Mingzhong   Wu, Lincoln D. Carr, Richard Eykholt, and Boris A. K...
cond-mat.mes-hall nlin.PS