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- W3000557685 abstract "Abstract The effect of Zn doping on Ni-Mn-Ga magnetic shape memory alloy was studied by the first-principles calculations using exact muffin-tin orbital method in combination with the coherent-potential approximation and projector augmented-wave method. Trends in martensitic transformation temperature T M and Curie temperature T C were predicted from calculated energy differences between austenite and nonmodulated martensite, Δ E A−NM , and energy differences between paramagnetic and ferromagnetic state, Δ E PM−FM . Doping upon the Ga-sublattice results in stabilization of martensitic phase which indicates the increase in T M . T C is affected only weakly or slightly decreases, because Δ E PM−FM of martensite does not change significantly with doping. The substitution of Mn atoms by Zn causes the decrease in both T M and T C . Comparing to Cu-doped Ni-Mn-Ga alloys, we predict that doping with Zn results in smaller decrease in T C but also in smaller increase in T M . Moreover, Cu doping upon the Ga-sublattice strongly decreases the magnetic anisotropy energy of martensite, whereas such strong effect was not observed for Zn doping. Based on the calculations of Zn-doped Ni-Mn-Ga alloys we suggest that simultaneous doping with Zn and an element increasing T C can result in significant increase in both transformation temperatures without strong decrease of magnetic anisotropy." @default.
- W3000557685 created "2020-01-23" @default.
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- W3000557685 date "2020-02-01" @default.
- W3000557685 modified "2023-09-27" @default.
- W3000557685 title "First-principles study of Zn-doping effects on phase stability and magnetic anisotropy of Ni-Mn-Ga alloys" @default.
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- W3000557685 doi "https://doi.org/10.1088/2053-1591/ab6925" @default.
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