  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.
