Abstract We exploit the high capabilities of a numerical technique that integrates molecular and spin dynamics simulation complemented with an auxiliary postprocessing code to evaluate the phonon and magnon dispersion curves in magnetic crystals. We apply the method to the magnetic bcc Fe at T=300 T = 300 K using the EAM potential developed by Chamati et al. (Surf. Sci. 600: 1793, 2006, https: //doi. org/10. 1016/j. susc. 2006. 02. 010) and demonstrate that the method enables identifying all resonant frequencies in the phonon and magnon spectra. Moreover, we computed the sound velocities, the quasiparticles lifetime and the exchange parameter in the magnon dispersion relation at small wavevectors. The obtained results are found to only qualitatively agree with their counterparts acquired using similar computational techniques, but dissimilar interatomic potentials and/or magnetic exchange function from one hand and to differ from those worked out via density functional theory methods from the other. We point out that a very good agreement between the experiment and the simulation outcomes of magnon and phonon dispersion laws confirms that the named EAM potential is valuable for modeling various kinetic, magnetoelastic and thermodynamic properties of iron.
Angelova et al. (Wed,) studied this question.