Approximation of integral coefficients of correlation magnetodynamics in a nonequilibrium region of phase space based on remagnetization of a sample

A. V. Ivanov


Abstract: The equations of correlation magnetodynamics (CMD) are derived from the atomistic model of a classical Heisenberg ferromagnet, taking into account correlations between nearest neighbors, and describe the magnet in the approximation of a continuous medium. In this paper, analytical approximations of the integral CMD coefficients are constructed based on the results of ”atom-to-atom” modeling in the nonequilibrium region of phase space corresponding to the remagnetization of the system under the influence of an external field. The obtained approximations are tested for primitive, body-centered and face-centered cubic crystal lattices at various values of the external field in a wide range of temperatures.

Keywords: Landau–Lifshitz–Bloch equation, correlation magnetodynamics, atomistic spin dynamics.