Cu-Au type orderings in the staggered quadrupolar region of the fcc Blume Emery Griffiths model

Details Cu-Au type orderings in the staggered quadrupolar region of the fcc Blume Emery Griffiths model Cu-Au type orderings in the staggered quadrupolar region of the fcc Blume Emery Griffiths model

2007-10-02

arxiv.org/abs/0710.0529v6

International Journal of Modern Physics C, 10, 1617 (2009)

Physics

Condensed Matter

Statistical Mechanics

24 pages, 11 figures

Scientific paper

The spin-1 Ising (BEG) model has been simulated using a cellular automaton (CA) algorithm improved from the Creutz cellular automaton (CCA) for a face-centered cubic (fcc) lattice. The ground state diagram ($k$, $d$) of the fcc BEG model has ferromagnetic ($F$), quadrupolar ($Q$) and staggered quadrupolar ($SQ$) ordering regions. The simulations have been made in the staggered quadrupolar region for the parameter values in the intervals $ -24\leq d=D/J<0$ and $-3\leq k=K/J\leq 0$ . The phase diagrams on the ($ kT_{C}/J$, $d$) and the ($kT_{C}/J$, $k$) planes have been obtained through $ k=-3$ and $d=-4$ lines, respectively. The staggered quadrupolar ordering region separates into five ordering regions ($A_{3}B(a)$, $A_{3}B(f)$, $AB$ (type-I), $AB$(type-II) and $AB_{3}(f)$) which have the different stoichiometric Cu-Au type structures.

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