Electromigration-driven Evolution of the Surface Morphology and Composition for a Bi-Component Solid Film

M. Khenner^1, 2 ; M. Bandegi¹

¹ Department of Mathematics, Western Kentucky University, Bowling Green, KY 42101
² Applied Physics Institute, Western Kentucky University, Bowling Green, KY 42101

Mathematical modelling of natural phenomena, Tome 10 (2015) no. 4, pp. 83-96

Résumé

A two PDEs-based model is developed for studies of a morphological and compositional evolution of a thermodynamically stable alloy surface in a strong electric field, assuming different and anisotropic diffusional mobilities of the two atomic components. The linear stability analysis of a planar surface and the computations of morphology coarsening are performed. It is shown that the conditions for instability and the characteristic wavelength and growth rate differ from their counterparts in a single-component film. Computational parametric analyses reveal the sensitivity of the scaling exponents to the electric field strength and to the magnitude of the anisotropies difference.

Détail

DOI : 10.1051/mmnp/201510405

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