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Zone center phonon frequencies in tetragonal zirconia: lattice dynamical study and new assignment proposition

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Author: Bouvier, P; Gupta, H C; Lucazeau, G

Advisor: Advisor

Date: 2001

Publisher:
Citation: Journal of

Series/Report no.:
Item Type: Article

Keywords: Phonons; Raman spectrometry

Abstract: A normal mode calculation of the zone center phonons in the tetragonal structure of ZrO2 compound has been performed with particular emphasis on the low frequency modes. A restricted set of stretching and bending force constants have been introduced and lead to a good agreement between theoretical and experimental Raman and IR phonon frequencies. The Eg symmetry of the two low frequency Raman modes which are involved in the softening process observed with increasing pressure were confirmed and none were left for a low frequency A1g totally symmetric mode as proposed in the literature.
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Shankar B. Chavan
Computer Applications Division
Central Library, IIT Delhi
shankar.chavan@library.iitd.ac.in
NDLTD
Shodhganga
NDL
ePrints@IISc
etd@IISc
IR@IIT Bombay
NewsClips @IITD
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