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First-principles lattice stability of Fe, Ru and Os

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Abstract

Lattice constants, total energies and densities of states of transition metals Fe, Ru and Os with BCC, FCC and HCP structures were calculated by the GGA+PBE functional and the ultrasoft pseudo-potential plane wave method, and compared with those of the first-principles projector augmented wave (PAW) method, CALPHAD method and experimental data. The results show that the lattice stability of this work is ΔG BCC-HCP>ΔG FCC-HCP>0, agreeing well with those of PAW method in the first-principles and CALPHAD method except for BCC-Fe. And the densities of state of HCP-Ru and Os have an obvious character of stable phase, agreeing completely with the results of the total energy calculations. Further analyses of atomic population show that the transition rate of electrons from s to p state for HCP, FCC and BCC crystals increases from Fe to Os, and a stronger cohesion, a higher cohesive energy or a more stable lattice between atoms of heavier metals are formed.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Central South University, Changsha, 410083, China

    Hui-jin Tao  (陶辉锦)

  2. School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China

    Hui-jin Tao  (陶辉锦)

  3. Key Laboratory of Nonferrous Materials Science and Engineering, Ministry of Education, Central South University, Changsha, 410083, China

    Hui-jin Tao  (陶辉锦) & Jian Yin  (尹 健)

Authors
  1. Hui-jin Tao  (陶辉锦)
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  2. Jian Yin  (尹 健)
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Correspondence to Hui-jin Tao  (陶辉锦).

Additional information

Foundation item: Project(20070533118) supported by the Doctoral Discipline Foundation of Ministry of Education of China; Projects(50471058, 50271085) supported by the National Natural Science Foundation of China; Project supported by the Postdoctoral Foundation of Central South University, China

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Tao, Hj., Yin, J. First-principles lattice stability of Fe, Ru and Os. J. Cent. South Univ. Technol. 16, 177–183 (2009). https://doi.org/10.1007/s11771-009-0030-6

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  • DOI: https://doi.org/10.1007/s11771-009-0030-6

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