Abstract
A lattice-dynamical model has been developed for bcc metals which considers ion-ion interaction through second-neighbor central pair potential and electron-ion interaction based on the Sharma-Joshi theory. In the present model the ionic lattice is in equilibrium in a medium of electrons. The theory has been applied to calculate the dispersion curves in a number of transition metals. The results when compared to experimental neutron data show a reasonably good agreement in the [100] and [111] directions, while sufficient deviations are present in the [110] direction.
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