Polarized micro-Raman study of Al2O3-based directionally solidified oxide eutectics containing GdAlO3 perovskite, Er3Al5O12 garnet and cubic ZrO2

The paper reports on the Raman signature of GdAlO3 perovskite and Er3Al5O12 garnet in melt‐grown eutectic composites, which contain α‐alumina and cubic zirconia also. Different wavelengths were used to discriminate the Raman signal from fluorescence of the rare‐earth elements. Fourteen out of the 24...

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Published in:Journal of Raman spectroscopy 2010-09, Vol.41 (9), p.969-977
Main Authors: Gouadec, G., Makaoui, K., Perrière, L., Colomban, Ph, Mazerolles, L.
Format: Article
Language:English
Subjects:
alumina
Backscattering
Chemical Sciences
Eutectics
garnet
Garnets
Material chemistry
Oxides
perovskite
Perovskites
polarization
Rare earth metals
Wavelengths
Zirconium dioxide
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container_end_page 977
container_issue 9
container_start_page 969
container_title Journal of Raman spectroscopy
container_volume 41
creator Gouadec, G.
Makaoui, K.
Perrière, L.
Colomban, Ph
Mazerolles, L.
description The paper reports on the Raman signature of GdAlO3 perovskite and Er3Al5O12 garnet in melt‐grown eutectic composites, which contain α‐alumina and cubic zirconia also. Different wavelengths were used to discriminate the Raman signal from fluorescence of the rare‐earth elements. Fourteen out of the 24 Raman active perovskite modes were identified. Mode symmetry is proposed for 12 of them, based on the polarization of the light backscattered by a rotated sample. Twenty‐one out of 25 Raman active modes of the garnet were listed and assigned by straight comparison with those of the parent compounds. Copyright © 2009 John Wiley & Sons, Ltd. GdAlO3 perovskite and Er3Al5O12 garnet were studied by Raman microscopy in eutectic composites. Twelve GdAlO3 mode symmetries were proposed based on the backscattering from a rotated sample. Twenty‐one out of the 25 Raman active modes of Er3Al5O12 were assigned by comparison with those of the parent compounds.
doi_str_mv 10.1002/jrs.2523
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subjects alumina
Backscattering
Chemical Sciences
Eutectics
garnet
Garnets
Material chemistry
Oxides
perovskite
Perovskites
polarization
Rare earth metals
Wavelengths
Zirconium dioxide
title Polarized micro-Raman study of Al2O3-based directionally solidified oxide eutectics containing GdAlO3 perovskite, Er3Al5O12 garnet and cubic ZrO2
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