Semiclassical description of anisotropic magnets for spin S=1

TL;DR

This paper develops a semiclassical framework for anisotropic spin-1 magnets using generalized coherent states, deriving nonlinear equations and dissipative spin wave equations for small excitations.

Contribution

It introduces a semiclassical approach to anisotropic S=1 magnets and derives new nonlinear and dissipative equations for their spin dynamics.

Findings

Derived nonlinear equations for 1D non-Heisenberg ferromagnets

Obtained dissipative spin wave equations for dipole and quadrupole branches

Provided a real parameterization using generalized coherent states

Abstract

In this paper, nonlinear equations describing one-dimensional non-Heisenberg ferromagnetic model are studied by use of generalized coherent states in a real parameterization. Also dissipative spin wave equation for dipole and quadruple branches is obtained if there is a small linear excitation from the ground state.