Abstract
We perform a first-principles calculation to understand the effect of the additional valence electron of the transition atom in Wyckoff position 4 a, on the electronic structure, magnetic and structural stability of the full Heusler \({\mathrm{Mn}}_{2}\mathrm{PtZ}(\mathrm{Z}=\mathrm{V and Co})\) compound. L21, Xa and tetragonal structures are considered to verify the most stable phase. Within the framework of the plan \({\mathrm{Mn}}_{2}\mathrm{PtZ}(\mathrm{Z}=\mathrm{V and Co})\) favored the ferromagnetic configuration in the L21 structure. The results show that the 63% and 91% spin polarization at the Fermi level for \({\mathrm{Mn}}_{2}\mathrm{PtV}\) and \({\mathrm{Mn}}_{2}\mathrm{PtCo}\), respectively. The most contribution of the magnetic moment is due to the Mn atom, the total magnetic moments equal to \({4.87\upmu }_{\mathrm{B}}\) and \({9.012\upmu }_{\mathrm{B}}\) have been reported. To prove the half metallicity of our compound, we used the GGA + U approach. Within the framework of this approach, the value gap in the minority spin band is 0.755 eV, more, the magnetic moment satisfying the Slater-Pauling rule for the \({\mathrm{Mn}}_{2}\mathrm{PtV}\) compound. In addition, we give the two values of the curie temperatures for the two cubic structural phases. Finally, both full Heusler \({\mathrm{Mn}}_{2}\mathrm{PtV}\) and \({\mathrm{Mn}}_{2}\mathrm{PtCo}\) are a promising candidate for the use of future devices as spin-FETs and nonvolatile magnetic memory.
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Hamli, M., Bensaid, D., Bouzouira, N. et al. The replacement reflection of a transition metal 3d3 by 3d7 on 4a site in Mn2PtZ compounds: FP-LAPW approach. Indian J Phys 96, 1663–1672 (2022). https://doi.org/10.1007/s12648-021-02095-0
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DOI: https://doi.org/10.1007/s12648-021-02095-0