Nonlinear dynamics of weak ferromagnetic spin chains

Abstract

The nonlinear dynamics of both the isotropic and single ion anisotropic Heisenberg ferromagnetic spin chains with Dzialoshinski-Moriya-type weak anisotropic interaction has been studied in the classical continuum limit. In both cases integrable weak ferromagnetic models exhibiting soliton-like elementary spin excitations have been identified. A class of spin wave solutions have also been reported in the anisotropic case.