We use a single dipole approximation to analyze the behavior of anisotropy-dominated magnetic nanoparticles subjected to an external r.f. field. We identify the steady state oscillations and analyze their stability. We also analyze the case when the external r.f. field has a time-dependent frequency which insures the most effective switching of the magnetization.
@article{arxiv.cond-mat/0703272,
title = {Time-dependent fields and anisotropy dominated magnetic media},
author = {K. Rivkin and W. Saslow and J. Ketterson},
journal= {arXiv preprint arXiv:cond-mat/0703272},
year = {2009}
}