Structural, electronic and vibrational properties of tetragonal zirconia under pressure: a density functional theory study.
J Phys Condens Matter
; 21(48): 485404, 2009 Dec 02.
Article
em En
| MEDLINE
| ID: mdl-21832518
ABSTRACT
We present the results of a plane wave based density functional study of the structure and properties of tetragonal zirconia in the range of pressures from 0 to 50 GPa. We predict a transition to a fluorite-type cubic structure at 37 GPa which is likely to be of a soft mode origin and is accompanied by a power law decrease of the frequency of the Raman-active A(1g) mode. A detailed study of the pressure effect on phonon modes is given, including theoretical Raman spectra and their pressure dependence. Our results provide a consistent picture of the pressure-induced phase transition in tetragonal zirconia.
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MEDLINE
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En
Ano de publicação:
2009
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Article