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Distortion of the oxygen sublattice in pure cubic-ZrO2

Published online by Cambridge University Press:  03 March 2011

C.M. Wang ,
S. Azad ,
S. Thevuthasan ,
V. Shutthanandan ,
D.E. McCready  and
C.H.F. Peden
C.M. Wang*
Affiliation:
Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
S. Azad
Affiliation:
Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
S. Thevuthasan
Affiliation:
Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
V. Shutthanandan
Affiliation:
Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
D.E. McCready
Affiliation:
Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
C.H.F. Peden
Affiliation:
Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
*
a) Address all correspondence to this author. e-mail: chongmin.wang@pnl.gov
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Abstract

Multilayer films of pure ZrO2 and CeO2 were grown using molecular beam epitaxy on a yttria-stabilized zirconia (YSZ) substrate. Distinctive forbidden diffraction spots of (odd, odd, even) type were observed on the selected-area electron-diffraction patterns of the film. Dark-field imaging clearly revealed that these forbidden diffraction spots were solely due to the ZrO2 layers. Comparison of the electron diffraction pattern with that simulated by dynamical calculations suggest that the pure ZrO2 layers possess a cubic structure of space with the group P4 3m oxygen sublattice being displaced diagonally, rather than along the c axis as suggested for YSZ. Our results further suggest that the displacement of the oxygen from the ideal (¼, ¼, ¼) position might have been introduced during the film growth process.

Keywords

EpitaxyFilmElectron microprobe
Type
Rapid Communications
Information
Journal of Materials Research , Volume 19 , Issue 5 , May 2004 , pp. 1315 - 1319
Copyright
Copyright © Materials Research Society 2004

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