Contribution à l’étude des propriétés électronique ,magnétique et élastique des Heusler

Abstract

Despite the widespread use of spintronic materials in technology today, their thermal, magnetic , electronic , elastic instability limits their use in some sectors, especially space applications and the hydrocarbon sector. In this work, serval properties of full-heusler and half-heusler, and quaternary alloys were studied by using DFT approximations. Our studies focused specifically on electrical and magnetic properties in order to develop magnetic materials with high thermal stability for use in future spintronic applications. Accordingly, several materials have been proposed as new materials for spintronic applications, such as the full-Heusler alloys (Co2CrAl, and Mn2CrAl) and (CoMnCrAl , MnCoCrAl) , the half-Heusler ( CoFeGe, CrFeGe, and NiFeGe) in addition to the new half-metallic series CoRhZrZ (Z = Pb, B, Ga, In, Al, Sn, Si) and ( CoRuCrAl ,CoRhCrAl). The latter shows high thermal stability of its half-metallic, magnetic, and electronic properties at harsh temperatures. Which makes it a suitable choice for spintronic applications such as magnetic sensing applications in space or applications related to the petroleum industries..