The lattice dynamics of $gamma$-iron

Abstract

Lattice dynamical calculations are performed on $gamma$-iron using theClark-Gazis-Wallis (CGW) model to represent the ion-ion interactions, and a modified form of the Sharma-Joshi model to include ion-electron interactions.The theory is used to compute the phonon dispersion curves, frequency spectra and the lattice specific heat of $gamma$-iron. The obtained results are in good agreement with the experimental findings, and are better than those calculated using the other theories.