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Title: | Monte Carlo Study of the Growth of L12 ordered domains in fcc A3B binary alloys |
Author: | Frontera Beccaria, Carlos Vives i Santa-Eulàlia, Eduard Castán i Vidal, Maria Teresa Planes Vila, Antoni |
Keywords: | Aliatges binaris Propietats magnètiques Mètode de Montecarlo Binary systems (Metallurgy) Magnetic properties Monte Carlo method |
Issue Date: | 1997 |
Publisher: | The American Physical Society |
Abstract: | A Monte Carlo study of the late time growth of L12-ordered domains in a fcc A3B binary alloy is presented. The energy of the alloy has been modeled by a nearest-neighbor interaction Ising Hamiltonian. The system exhibits a fourfold degenerated ground state and two kinds of interfaces separating ordered domains: flat and curved antiphase boundaries. Two different dynamics are used in the simulations: the standard atom-atom exchange mechanism and the more realistic vacancy-atom exchange mechanism. The results obtained by both methods are compared. In particular we study the time evolution of the excess energy, the structure factor and the mean distance between walls. In the case of atom-atom exchange mechanism anisotropic growth has been found: two characteristic lengths are needed in order to describe the evolution. Contrarily, with the vacancyatom exchange mechanism scaling with a single length holds. Results are contrasted with existing experiments in Cu3Au and theories for anisotropic growth. |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.55.212 |
It is part of: | Physical Review B, 1997, vol. 55, núm. 1, p. 212-225 |
URI: | http://hdl.handle.net/2445/10474 |
Related resource: | http://dx.doi.org/10.1103/PhysRevB.55.212 |
ISSN: | 0163-1829 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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