Slow equilibration in systems undergoing diffusion-controlled phase separation on a lattice

Gene F. Mazenko, Oriol T. Valls

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

We consider binary alloys undergoing phase separation after a deep temperature quench. We present Monte Carlo simulation results showing that such systems freeze when quenched to zero temperature. This holds for a wide range of atomic and vacancy concentrations. We interpret these results in terms of an equilibration mechanism dominated by activated diffusive motion of atoms on a lattice across an interface with an activation energy dependent on the local curvature. We show that in such a case the domain size increases logarithmically for quenches to low temperatures. This logarithmic law is shown to be in excellent agreement with neutron scattering experiments.

Original languageEnglish (US)
Pages (from-to)1823-1829
Number of pages7
JournalPhysical Review B
Volume33
Issue number3
DOIs
StatePublished - Jan 1 1986

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