Abstract
A two-layer Zr0.8Sc0.2O1.9/Ce0.9Gd0.1O1.95 heterostructure has been modeled by the molecular dynamics method in a box containing about 27 thousand atoms. It is shown that this system retains on the whole the crystallographic characteristics of layers doped with zirconia and ceria, having a fluorite structure. Crystal structure distortions are observed in a narrow boundary layer with a thickness of few angstrom. An analysis of pair correlation functions indicates that the oxygen sublattice in the heterostructure is disordered. The calculated values of the layer-by-layer diffusion coefficient of oxygen and the diffusion activation energy are compared with the data of both direct physical and computer experiments.
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ACKNOWLEDGMENTS
This study was supported by the Russian Foundation for Basic Research, project no. 17-03-00650.
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Translated by Yu. Sin’kov
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Ivanov-Schitz, A.K., Gotlib, I.Y., Galin, M.Z. et al. Computer Simulation of Zr0.8Sc0.2O1.9/Ce0.9Gd0.1O1.95 Heterostructure. Crystallogr. Rep. 64, 407–412 (2019). https://doi.org/10.1134/S1063774519030118
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DOI: https://doi.org/10.1134/S1063774519030118