Influence of Ni doping on the electronic structure of Ni_2MnGa

Details Influence of Ni doping on the electronic structure of Ni_2MnGa Influence of Ni doping on the electronic structure of Ni_2MnGa

2004-12-22

arxiv.org/abs/cond-mat/0412611v2

Physics

Condensed Matter

Materials Science

4 pages, 4 figures, accepted in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.72.073103

The modifications in the electronic structure of Ni_{2+x}Mn_{1-x}Ga by Ni doping have been studied using full potential linearized augmented plane wave method and ultra-violet photoemission spectroscopy. Ni 3d related electron states appear due to formation of Ni clusters. We show the possibility of changing the minority-spin DOS with Ni doping, while the majority-spin DOS remains almost unchanged. The total magnetic moment decreases with excess Ni. The total energy calculations corroborate the experimentally reported changes in the Curie temperature and the martensitic transition temperature with x.

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