Influence of Co and Mn on Electronic and Magnetic properties of Ni2MnGa Heusler alloy

TL;DR

This study investigates how doping Ni2MnGa Heusler alloys with Co and Mn affects their electronic and magnetic properties, using advanced computational methods to reveal tunable magnetization and stability.

Contribution

It provides a detailed computational analysis of Co and Mn doping effects on Ni2MnGa alloys, highlighting changes in magnetic behavior and stability not previously characterized.

Findings

Magnetization can be tuned by varying Co and Mn doping levels.

Doping influences critical temperature and magnetic interactions.

Magnetic stability of the alloys is affected by dopant concentrations.

Abstract

The ferromagnetic Heusler alloy $Ni_2MnGa$ had been of major interest in the past few years because of its magnetic properties which can be easily tuned. The $Ni_2MnGa$ Heusler alloys are intermetallic alloy with $L2_1$ structure. Here we report a detailed investigation of the effect of doping of Co and Mn in Ni2MnGa. Magnetic properties and electronic structure of $Ni_{2-x}Co_xMnGa_{1-y}Mn_y$ Heusler alloys have been studied by using Green's function-based KKR-CPA method based DFT calculations. We will show the magnetization can be tuned depending on the Co and Mn occumencies. We will also discuss the critical temperature, magnetic interactions and magnetic stability of the systems.