Generation of bright and dark envelope solitons from magnetostatic spin waves with attractive nonlinearity

In this paper, reports the first data on the generation of both bright and dark soliton trains in a medium with attractive nonlinearity. The success of the modified NLS equation model with nonlinear damping in matching the computed wave forms to the data indicates that, for cw excitation, the formation of nonlinear wave trains involves more than the competition between nonlinearity and dispersion. The match shows that nonlinear damping plays a crucial role in this process.