Volume 43, Number 6, September II 1998
|Page(s)||629 - 634|
|Published online||01 September 2002|
An X-ray scattering and simulation study of the ordering kinetics in CuAu
Department of Physics, Oakland University, Rochester, MI 48309-4401, USA
2 Department of Physics Department, Boston University, 590 Commonwealth Ave., Boston, MA 02215, USA
3 Physics Department, Brandeis University - Waltham, MA 02254, USA
4 Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801, USA
Accepted: 15 July 1998
A detailed numerical and experimental study of the ordering of the low-temperat ure tetragonal phase of CuAu is presented. The numerical simulations are based on a coarse-grained free energy derived from electronic structure calculations of CuAu, while the experimental results are obtained from in situ X-ray scattering. Both theoretical and experimental work indicate a subtle kinetic competition between the ordered tetragonal phase and the metastable modulated phase.
PACS: 05.70.Ln – Nonequilibrium thermodynamics, irreversible processes / 64.60.Cn – Order-disorder transformations; statistical mechanics of model systems / 81.30.Hd – Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder
© EDP Sciences, 1998
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