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Etude I.R. et Raman des vibrations de réseau de AlO 3 Nd
Author(s) -
Alain P.,
Piriou B.
Publication year - 1971
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220430228
Subject(s) - raman spectroscopy , phonon , dispersion (optics) , physics , infrared , single crystal , crystal (programming language) , optics , molecular physics , crystallography , chemistry , materials science , condensed matter physics , programming language , computer science
The optical phonons of AlO 3 Nd are studied by measurements of polarized infrared reflexion spectra on single crystals in the range 80 to 30000 cm −1 . The E u ‐mode parameters are fitted by classical dispersion theory after performing Kramers‐Kronig analysis. Owing to the small size of single crystal domains, an accurate reflexion spectrum for A‐modes cannot be observed and a peculiar analysis method is used to determine oscillator parameters from a composite spectrum with two standards of mode. The Raman active frequencies measured on single crystals oriented ( X, Y, Z ) and ( X, YZ, YZ ) are given. These results, together with crystallographic studies, indicate that the three compounds AlO 3 Nd, AlO 3 Pr, and AlO 3 La are consistent with the space group D 3d 6 .