  Using density functional theory based calculations, we have carried out
in-depth studies of effect of Co substitution on the magnetic properties of Ni
and Pt-based shape memory alloys. We show the systematic variation of the total
magnetic moment, as a function of Co doping. A detailed analysis of evolution
of Heisenberg exchange coupling parameters as a function of Co doping has been
presented here. The strength of RKKY type of exchange interaction is found to
decay with the increase of Co doping.
