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- W2541569262 abstract "The structural, electronic, magnetic and thermal properties of BaFe1−xNbxO3 perovskites oxides are investigated using the Density Functional Theory (DFT). The Generalized Gradient Approximation (GGA) and on-site Hubbard potential corrections (GGA + U) are considered. According to the formation energies and phonon spectra, the stoichiometric BaFeO3 and BaNbO3 oxides have a stable cubic phase. The GGA + U calculations show a half metallic behavior of BaFeO3 with a large exchange splitting, in agreement with previous experimental and theoretical works. The Fe substitution by Nb for x = 0.5 leads to a surprising insulating ground state. The values of the band gap is 0.40 eV and 1.84 eV using GGA and GGA + U, respectively. For x = 0.875 and x = 1, the corresponding alloys are metallic and non-magnetic, while for x = 0.5 and x = 0.625 the antiferromagnetic ground state is found using GGA + U. For the remaining Nb compositions a half metallic character is noticed with a ferromagnetic state. The quasi-harmonic Debye model is successfully applied to study the temperature evolution of lattice parameters and bulk moduli for different Nb compositions." @default.
- W2541569262 created "2016-11-04" @default.
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- W2541569262 date "2017-01-01" @default.
- W2541569262 modified "2023-10-02" @default.
- W2541569262 title "Effects of Fe substitution by Nb on physical properties of BaFeO3: A DFT+U study" @default.
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- W2541569262 doi "https://doi.org/10.1016/j.commatsci.2016.10.018" @default.
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