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Cation arrangement in the complex perovskites and vibrational spectra
Author(s) -
Siny I. G.,
Katiyar R. S.,
Bhalla A. S.
Publication year - 1998
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/(sici)1097-4555(199805)29:5<385::aid-jrs250>3.0.co;2-f
Subject(s) - raman spectroscopy , perovskite (structure) , dielectric , chemistry , spectral line , crystallography , materials science , physics , optics , optoelectronics , astronomy
Vibrational spectrum analysis was used to study the cation arrangement in the complex perovskites. The transition from the ideal perovskite structure ABO 3 to complex compositions with a pair of the A or B cations, such as A 1/2 ′ A 1/2 ″ BO 3 or AB 1/2 ′ B 1/2 ″ O 3 , leads to drastic changes in the Raman spectra. Correlation between a change in the Raman spectra and the recent structure analysis by advanced direct methods is discussed for some important ‘model’ compounds, such as relaxor ferroelectrics PbSc 1/2 Ta 1/2 O 3 (PST), PbMg 1/3 Nb 2/3 O 3 (PMN) and Na 1/2 Bi 1/2 TiO 3 (NBT) and the low‐dielectric material BaMg 1/3 Ta 2/3 O 3 (BMT). © 1998 John Wiley & Sons Ltd.