The lattice dynamics of the binary alloys Ni0.55Pd0.45, Pd0.84Pt0.16, Ni0.3Fe0.7 and Ni0.5Co0.5 has been studied within the framework of the transition metal model potential approach and the mean-crystal approximation. A short-range three-body interaction, incorporated in a phenomenological way in the study, leads to an improvement in the transverse branches of the phonon dispersion curves. The theoretically calculated phonon dispersion curves are found to be in good agreement with the experimental data.
Physica B Condensed Matter 12/1993; 192(4):325-332. DOI:10.1016/0921-4526(93)90005-Q