Computer Simulation of Zr0.8Sc0.2O1.9/Ce0.9Gd0.1O1.95 Heterostructure
- Authors: Ivanov-Schitz A.K.1, Gotlib I.Y.2, Galin M.Z.3, Mazo G.N.4, Murin I.V.2
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Affiliations:
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences
- St. Petersburg State University
- Institute of Problems of Chemical Physics, Russian Academy of Sciences
- Moscow State University
- Issue: Vol 64, No 3 (2019)
- Pages: 407-412
- Section: Physical Properties of Crystals
- URL: https://journals.rcsi.science/1063-7745/article/view/193928
- DOI: https://doi.org/10.1134/S1063774519030118
- ID: 193928
Cite item
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.
About the authors
A. K. Ivanov-Schitz
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Author for correspondence.
Email: alexey.k.ivanov@gmail.com
Russian Federation, Moscow, 119333
I. Yu. Gotlib
St. Petersburg State University
Email: alexey.k.ivanov@gmail.com
Russian Federation, St. Petersburg, 199034
M. Z. Galin
Institute of Problems of Chemical Physics, Russian Academy of Sciences
Email: alexey.k.ivanov@gmail.com
Russian Federation,
Chernogolovka, Moscow oblast, 142432
G. N. Mazo
Moscow State University
Email: alexey.k.ivanov@gmail.com
Russian Federation, Moscow, 119991
I. V. Murin
St. Petersburg State University
Email: alexey.k.ivanov@gmail.com
Russian Federation, St. Petersburg, 199034