Numéro |
J. Phys. I France
Volume 4, Numéro 7, July 1994
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Page(s) | 1063 - 1075 | |
DOI | https://doi.org/10.1051/jp1:1994184 |
J. Phys. I France 4 (1994) 1063-1075
Ternary coherent phase diagram on the FCC lattice
P. Cénédèse1, Y. Calvayrac1 and A. Marty21 CECM/CNRS, 15 rue G. Urbain, 94407 Vitry-sur-Seine, France
2 CENG/DRFMC/SPMM/MP, 85X, 38041 Grenoble Cedex, France
(Received 28 January 1994, received in final form 25 March 1994, accepted 30 March 1994)
Abstract
In this paper, we describe a general and original method to study
the ground state problem, in multicomponent systems. The method is
illustrated by considering the nearest neighbour Ising model in
ternary FCC lattices, and leads to the occurrence as a ground
state of a new phase called L'. The ternary coherent phase diagram
is then calculated within the CVM tetrahedron approximation,
showing Chat the L' phase displays a stability domain as large
as those of the L1
0 and L1
2 domains. At low but non-zero
temperature, a "quaternary ground state" phase, called L",
stabilized by entropy effects, appears in the phase diagram.
© Les Editions de Physique 1994