The role of Anderson-Gruneisen parameter in the estimation of self-diffusion coefficients in alkaline earth oxides.

In a previous publication [J. Appl. Phys. 110, 036103 (2011)], we have shown that the bulk expansivity and elastic data can reproduce the self-diffusion coefficients in MgO over a wide range of values, i.e., 20 orders of magnitude. This publication was crossed with recent studies supporting the view that the Anderson-Gruneisen parameter δ is independent of the temperature in alkaline earth oxides. Here, we take this view and using the resulting elastic and expansivity parameters, we repeat the calculation for the diffusion coefficient of O in MgO. The results obtained agree with the experimental data. [ABSTRACT FROM AUTHOR]