The low temperature relaxation of the magnetization in magnetic molecular solids such as Fe8 is studied using Monte Carlo simulations. A set of rate equations is developed to understand the simulations, and the results are compared. The simulations show that the magnetization of an initially saturated samples deviates as a square-root in time at short times, as observed experimentally, and this law is derived from the rate equations analytically.
@article{arxiv.1110.1899,
title = {Low-Temperature Magnetization Relaxation in Magnetic Molecular Solids},
author = {Avinash Vijayaraghavan and Anupam Garg},
journal= {arXiv preprint arXiv:1110.1899},
year = {2015}
}