Ab initio Study of Effect of Co Substitution on the Magnetic Properties of Ni and Pt-based Heusler Alloys

TL;DR

This study uses density functional theory to analyze how cobalt substitution influences the magnetic properties of Ni and Pt-based Heusler alloys, revealing systematic changes in magnetic moments and exchange interactions.

Contribution

It provides a detailed first-principles analysis of Co doping effects on magnetic moments and exchange interactions in Ni and Pt-based Heusler alloys, which was previously unexplored.

Findings

Magnetic moment varies systematically with Co doping.

RKKY exchange interaction strength decays as Co doping increases.

Detailed evolution of Heisenberg exchange parameters is characterized.

Abstract

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.