Constant-volume molecular dynamics calculations were carried out for material which contained 20mol% of yttria, and in which Y ions were artificially arranged in layers. It was found that the O ion diffusion coefficient in the artificial material was larger than that in material with a random distribution of Y ions.

H.Okazaki, H.Suzuki, K.Ihata: Physics Letters A, 1994, 188[3], 291-5