Nonlinear magnetostatic surface waves of magnetic multilayers: Effective medium theory - art. no. 054415

We present a nonlinear effective medium method to investigate properties of nonlinear surface magnetostatic waves of magnetic superlattice films, or m agnetic multilayers. In the third-order approximation, the nonlinear expres sions of alternating effective magnetization in the systems are obtained. O n this basis, the nonlinear coefficients, wave number, and frequency shifts of surface magnetostatic waves an calculated numerically. A very interesti ng result is that magnetostatic surface envelope solitons are possible to e xist in a certain frequency range since the Lighthill criterion is satisfie d in this range. In the meanwhile, we find that then is a basic mistake in the previous theory related to the nonlinear surface magnetostatic waves of a single magnetic film.