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A model for phase separation two components during a thin film deposition is presented and analyzed in this work. The model includes the processes of adsorption and phase separation. The process of phases separation is described using Cahn- Hilliard equation. Calculations were performed using different approximations (four and six degree polynomials) of free energy of a homogenous system. The formations of columnar, granular-like or mixed patterns are shown by numerical simulations of the presented model. That depends on concentration of the constituent components and approximation of free energy used. [ABSTRACT FROM AUTHOR]

Experimentally observed surface segregation of nickel during Ni:C thin films growth is analyzed by kinetic model. Kinetic model includes processes of adsorption, diffusion, surface segregation. Diffusion and surface segregation are allowed in a layer near the surface by using hyperbolic tangent and Gaussian functions. It is shown by modeling that there is no significant difference between results that were obtained by using hyperbolic tangent and Gaussian functions. [ABSTRACT FROM AUTHOR]