Nonlinear response of superparamagnets with finite damping: an analytical approach
Statistical Mechanics
2007-05-23 v1 Soft Condensed Matter
Abstract
The strongly damping-dependent nonlinear dynamical response of classical superparamagnets is investigated by means of an analytical approach. Using rigorous balance equations for the spin occupation numbers a simple approximate expression is derived for the nonlinear susceptibility. The results are in good agreement with those obtained from the exact (continued-fraction) solution of the Fokker-Planck equation. The formula obtained could be of assistance in the modelling of the experimental data and the determination of the damping coefficient in superparamagnets.
Keywords
Cite
@article{arxiv.cond-mat/0404445,
title = {Nonlinear response of superparamagnets with finite damping: an analytical approach},
author = {J. L. Garcia-Palacios and D. A. Garanin},
journal= {arXiv preprint arXiv:cond-mat/0404445},
year = {2007}
}
Comments
7 PR pages, 2 figures