Vibrational Spectra of a-Fe/sub .78/P/sub .22/ by Inelastic Neutron Scattering

摘要

Inelastic neutron scattering spectra, G(E), are reported for the amorphous metal-metalloid alloy a-Fe/sub .78/P/sub .22/ and crystalline counterpart, c-Fe sub 3 P. The results indicate similarities in the broadened crystalline and amorphous spectra that are highly supportive of similar short range order. The a-Fe/sub .78/P/sub .22/ spectra indicate, however, a substantial softening of low frequency Fe-Fe interactions. The amorphous spectra are in good qualitative agreement with the theoretical density of states, although a reduction of Fe-Fe and Fe-P interactions are observed. The Fe-Fe band is also found to occur near to that predicted for pure a-Fe. (ERA citation 10:021207)