Kinetics of Phase Separation in Thin Films: Lattice versus Continuum Models for Solid Binary Mixtures

Details Kinetics of Phase Separation in Thin Films: Lattice versus Continuum Models for Solid Binary Mixtures Kinetics of Phase Separation in Thin Films: Lattice versus Continuum Models for Solid Binary Mixtures

2008-10-08

arxiv.org/abs/0810.1384v1

Physics

Condensed Matter

Statistical Mechanics

13 pages, 13 figures. Submitted to Phys. Rev. E

Scientific paper

10.1103/PhysRevE.79.021602

A description of phase separation kinetics for solid binary (A,B) mixtures in thin film geometry based on the Kawasaki spin-exchange kinetic Ising model is presented in a discrete lattice molecular field formulation. It is shown that the model describes the interplay of wetting layer formation and lateral phase separation, which leads to a characteristic domain size $\ell(t)$ in the directions parallel to the confining walls that grows according to the Lifshitz-Slyozov $t^{1/3}$ law with time $t$ after the quench. Near the critical point of the model, the description is shown to be equivalent to the standard treatments based on Ginzburg-Landau models. Unlike the latter, the present treatment is reliable also at temperatures far below criticality, where the correlation length in the bulk is only of the order of a lattice spacing, and steep concentration variations may occur near the walls, invalidating the gradient square approximation. A further merit is that the relation to the interaction parameters in the bulk and at the walls is always transparent, and the correct free energy at low temperatures is consistent with the time evolution by construction.

Affiliated with

Also associated with

No associations

Rating

Kinetics of Phase Separation in Thin Films: Lattice versus Continuum Models for Solid Binary Mixtures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Kinetics of Phase Separation in Thin Films: Lattice versus Continuum Models for Solid Binary Mixtures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinetics of Phase Separation in Thin Films: Lattice versus Continuum Models for Solid Binary Mixtures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-29795