Mecke K (1995)
Publication Status: Published
Publication Type: Journal article
Publication year: 1995
Publisher: AMERICAN PHYSICAL SOC
Book Volume: 52
Pages Range: 2107-2116
Journal Issue: 3
The segregation at a (100) surface of Cu3Au is studied slightly above the order-disorder transition at T-c. Based on a semi-infinite lattice-gas model with nearest- and next-nearest-neighbor interactions, we find within mean-field theory that close to the surface and in the disordered phase the Au concentration decays exponentially towards its bulk value. The corresponding decay length Lambda increases as (T-T-sp)(-1/2) upon approaching T-c, where T-sp < T-c denotes the spinodal temperature of the order-disorder transition. Without using any adjustable parameters, we obtain theoretical predictions in good quantitative agreement with recent x-ray-scattering data from this surface.
APA:
Mecke, K. (1995). SEGREGATION PROFILES IN CU3AU ABOVE THE ORDER-DISORDER TRANSITION. Physical Review B, 52(3), 2107-2116.
MLA:
Mecke, Klaus. "SEGREGATION PROFILES IN CU3AU ABOVE THE ORDER-DISORDER TRANSITION." Physical Review B 52.3 (1995): 2107-2116.
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