Oxygen self-diffusivities and surface exchange coefficients and the
respective activation enthalpies have been estimated, and all samples
exhibited a typical Arrhenius behaviour of the surface exchange coefficients
meaning that the surface incorporation reaction is thermally activated.
The doped samples exhibit higher surface concentrations as well
as higher surface exchange coefficients as compared to the undoped
sample. This indicates that doping has a direct influence to the oxygen
incorporation reaction.