Magnetization reversal in ferromagnets

Quantum and classical reversal of magnetization in ferromagnets are considered. Expressions for the tunnelling and thermal activation rates of the magnetization reversal with the effect of magnetoelastic dissipation to the lowest order are presented with the prefactors included. The results are given for low temperatures, near the cross-over temperature and for high temperatures, so that an experimental check would be possible to perform. The results are within the transition state theory.