Wetting phenomena in bcc binary alloys

Details Wetting phenomena in bcc binary alloys Wetting phenomena in bcc binary alloys

1997-04-26

arxiv.org/abs/cond-mat/9704215v2

Int. J. Thermophysics 19 (1998) 1219-1228

Physics

Condensed Matter

Statistical Mechanics

Some minor corrections in Sec.4, Fig.2 replaced

Scientific paper

We study the influence of the surface orientation on the wetting behavior of bcc binary alloys, using a semi-infinite lattice model equivalent to a nearest-neighbor Ising antiferromagnet in an external field. The salient feature of the model is the generation of an ``effective'' ordering surface field for symmetry-breaking surface orientations like (100). Such a field couples to the local order parameter at the surface and leads to the occurrence of wetting phenomena below the critical temperature T_c. Utilizing a Ginzburg-Landau continuum model which has been derived earlier from the lattice mean-field theory, the wetting phase diagram is calculated.

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