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Polarized micro‐Raman study of Al 2 O 3 ‐based directionally solidified oxide eutectics containing GdAlO 3 perovskite, Er 3 Al 5 O 12 garnet and cubic ZrO 2
Author(s) -
Gouadec G.,
Makaoui K.,
Perrière L.,
Colomban Ph.,
Mazerolles L.
Publication year - 2010
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2523
Subject(s) - raman spectroscopy , eutectic system , materials science , perovskite (structure) , analytical chemistry (journal) , raman scattering , oxide , polarization (electrochemistry) , mineralogy , crystallography , optics , chemistry , metallurgy , microstructure , physics , chromatography
The paper reports on the Raman signature of GdAlO 3 perovskite and Er 3 Al 5 O 12 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.