First-principles investigation of phase stability and electronic structure of tetragonal (P4/m) Ga 3-x Al x Ti 2 (x = 0-3) compounds

P. S. Ghosh, A. Arya, U. D. Kulkarni, G. K. Dey, T. Nakano, Y. Umakoshi, K. Hagihara, S. Hata

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

We report a first-principles study of the phase stability and electronic structure of tetragonal (P4/m) Ga3-x Al x Ti2 (x = 0-3) compounds to investigate the conspicuous absence of Al3Ti2 in the Al-Ti phase diagram while isostructural Ga3Ti2 is stable in the Ga-Ti phase diagram. It is found that Ga3Ti2 is the most stable phase compared to its ternary derivatives (Ga3-x Al x)Ti2, with the stability of Al3Ti2 being the lowest. Furthermore, the equimolecular phase mixture of γ-TiAl and r-Al2Ti is found to be more stable than Al3Ti2. By analysing the total and partial density of states, the valence charge transfer and the valence charge density distributions, we substantiate our conclusions from the perspective of the electronic structure.

本文言語英語
ページ(範囲)273-282
ページ数10
ジャーナルPhilosophical Magazine Letters
93
5
DOI
出版ステータス出版済み - 5 1 2013

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学

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