| Popis: |
In this paper, we have presented the comparative study of mechanical, electrical and magnetic properties of Co2MnAl1−xZx Heusler alloy with Z = Si, Ge and Ga and x = 0, 0.25, 0.75 and 1 using electronegativity (EN) model. We employed density functional theory for numerical calculations. It is found that Co2MnAl1−xZx with Z = Ga, Ge follow the Vegard's law while Co2MnAl1−xSix does not follow the same trend. Among all composition Co2MnAl.25Si.75 alloy is found to be more compressible. Electronic density distribution depicts the ionic nature of Co2MnAl1−xZx alloy systems. The Co2MnAl1−xZx with Z = Si, Ge possess larger magnetic moment and band gap with respect to Co2MnAl1−xGax system which results from the EN difference, degree of delocalization of valence electron, atomic size and atomic number, respectively. Keywords: Heusler alloy, Lattice parameter, Bulk modulus (BM), Magnetic moment, Band gap |
