Vibrational properties of NiPd and NiCr alloys

Abstract

The augmented space cluster coherent potential approximation is applied to the study of the vibrational properties of NiPd and NiCr alloys. Together with the earlier work on NiPt, this forms a systematic study of effects of large mass and force-constant disorders and clustering effects. The AS-CCPA represents a significant improvement over the earlier MCPA calculations in comparison with experimental data.