Messanae Universitas Studiorum

On the electronic structure of ordered and substitutional disordered Fe-Al and Fe-Al-Ti alloys

Donato, P. and Florio, G. M. and Ginatempo, B. and Bruno, E. and Giuliano, E. S. (1994) On the electronic structure of ordered and substitutional disordered Fe-Al and Fe-Al-Ti alloys. Accademia Peloritana dei Pericolanti Classe FF.MM.NN., LXXII (Supplement 1). pp. 477-484.

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    Abstract

    We present first principle total energy KKR-CPA calculations (1)of $Fe_0_._5- Al_0_._5$ and $Fe_0_._4_7_5- Al_0_._4_7_5-Ti_0_.0_5$ alloys, both in the ordered and random crystal structure. We found that the ordered B2 crystal structure is always more stable with respect to the random alloys. This behaviour is discussed in terms of the electronic structure. The last is characterized by almost orizontal Fe d bands at the Fermi energy. The disorder induced broadening of these states does not allow the definition of a neat Fermi surface in the random phases(2). The addition of Ti does not change qualitatively the energetic behaviour of the systems. We found however a remarkable energy shift between Ti d states on different sublattices of the B2 structure.

    Item Type: Article
    Subjects: M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Fisiche, Matematiche e Naturali > 1994 > Supplemento 1 parte 2
    M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Medico-Biologiche > 1994 > Supplemento 1 parte 2
    M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Giuridiche, Economiche e Politiche > 1994 > Supplemento 1 parte 2
    M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Lettere, Filosofia e belle Arti > 1994 > Supplemento 1 parte 2
    Divisions: UNSPECIFIED
    Depositing User: Mr Nunzio Femminò
    Date Deposited: 17 Apr 2014 11:53
    Last Modified: 17 Apr 2014 11:53
    URI: http://cab.unime.it/mus/id/eprint/5168

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