Topological and dynamical excitations in a classical 2D easy-axis Heisenberg model

The properties of dynamical solitons (magnon droplets) in the classical, tw o-dimensional anisotropic Heisenberg model with easy-axis exchange anisotro py are studied. The solution of the Landau-Lifshitz equation in the continu um limit for the soliton with topological charge q = 1 is obtained numerica lly using a shooting method. We analized a wide range of the anisotropy par ameter and our results are in good agreement with results obtained from spi n dynamics simulations. The dependence of an internal precession frequency of the soliton on both the anisotropy parameter and the radius of the solit on is also investigated. Finally, the limits of applicability of the contin uum approach are discussed.