A Monte Carlo study was made of the linear enhancement factor for the solvent tracer diffusivity in dilute fcc alloys. The model used was the well-known five-frequency model with isolated solute atoms. It was shown that the analytical treatments by Howard and Manning and by Ishioka and Koiwa had major shortcomings in their handling of correlation effects for certain combinations of the atom-vacancy exchange frequencies. Many of the values of the exchange frequency ratios that were determined from experiment by way of these treatments were probably in some error.

Computer Simulation of Solute-Enhanced Diffusion Kinetics in Dilute FCC Alloys. I.V.Belova, G.E.Murch: Philosophical Magazine, 2003, 83[3], 377-92