Abstract
We show that the differences in stability of 3d–5d NiPt and 3d–4d NiPd alloys arisemainly due to relativistic corrections. The magnetic properties of disordered NiPdand NiPt alloys also differ due to these corrections, which lead to increase inthe separation between the s–d bands of 5d elements in these alloys. For themagnetic case we also analyse the results in terms of splitting of majority andminority spin d band centres of the 3d elements. We further examine the effect ofrelativistic corrections to the pair energies and order–disorder transition temperaturesin these alloys. The magnetic moments and Curie temperatures have also beenstudied along with the short range ordering/segregation effects in NiPt/NiPd alloys.
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