Magnetization Dynamics at Elevated Temperatures: Beyond the Molecular Field Approximation for Critical Points

Some refinements to the values of magnetic critical points are proposed in order to improve the applicability universal molecular field approximation (MFA) which usually describes the equilibrium, or static, part in the non-equilibrium equations of magnetization dynamics. We show the results for the Curie and some other critical points calculated within the random phase approximation (RPA) for anisotropic Heisenberg models.