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Order–disorder and structural phase transitions in solid‐state materials by Raman scattering analysis
Author(s) -
CarabatosNédelec C.,
Becker P.
Publication year - 1997
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(199709)28:9<663::aid-jrs157>3.0.co;2-l
Subject(s) - anharmonicity , raman spectroscopy , raman scattering , phase transition , lead zirconate titanate , wavenumber , condensed matter physics , phase (matter) , materials science , titanate , ceramic , chemistry , ferroelectricity , molecular physics , optics , physics , optoelectronics , organic chemistry , dielectric , composite material
The temperature dependence of the vibrational wavenumbers, of the anharmonic and/or order–disorder origin of the damping and of the Raman intensities are briefly presented. On that basis, it is then shown that one can obtain information such as the height of the potential barrier, the orientational correlation time, the spatial correlation length and the anharmonic contribution to the Raman peak evolution with temperature. The concepts were applied and exploited with success in three characteristic cases, diethylenetriammonium chlorocadmate [(denH 3 )CdCl 5 ] single crystals, zinc thiourea sulphate [ZTS] single crystals and lead–lanthanum zirconate–titanate [PLZT] ceramics in which order–disorder and structural phase transitions are observed. © 1997 John Wiley & Sons, Ltd.