We study the magnetization dynamics of a molecular magnet driven by static and variable magnetic fields within a semiclassical treatment. The underling analyzes is valid in a regime, when the energy is definitely lower than the anisotropy barrier, but still a substantial number of states are excited. We find the phase space to contain a separatrix line. Solutions far from it are oscillatory whereas the separatrix solution is of a soliton type. States near the separatrix are extremely sensitive to small perturbations, a fact which we utilize for dynamically induced magnetization switching.
@article{arxiv.0907.4105,
title = {Dynamic switching of magnetization in driven magnetic molecules},
author = {L. Chotorlishvili and P. Schwab and J. Berakdar},
journal= {arXiv preprint arXiv:0907.4105},
year = {2009}
}