Diffusion in a model of an ordered alloy

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Abstract
In this paper a simple model of a stoichiometric ordered alloy is considered. Computer simulation is used to determine the behaviour of the tracer correlation factor and cosines of the angles between consecutive tracer jumps. The asymptotic behaviour of the average of the cosine of the angle between jumps for atoms starting from the ‘wrong’ lattice is derived analytically from consideration of vacancy jump sequences and verified by computer simulation. The efficiency of the six-jump cycle mechanism is also determined. It is clearly shown that this mechanism rapidly becomes dominant as the lattice becomes more ordered.