Abstract
We have revealed the influence of composition doping (Ni2+x Mn1−x Ga, Ni2+x MnGa1−x , and Ni2Mn1+x Ga1−x ) on lattice constants and atomic magnetic moments of austenite, 7 M and NM martensite, by ab initio calculations. It is demonstrated that Ni-doping decreases the volume, whereas Mn-doping increases it. The total magnetic moment of the three series of alloys is mainly dominated by their Mn content with little phase-state dependence. The perturbation of the magnetic moments by atom substitution is mainly dominated by the Mn environment. This study is expected to provide information on composition-related structure and magnetic properties of Ni–Mn–Ga alloys that could not be obtained by experiments.
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