DocumentCode :
1034186
Title :
Raman scattering study of ca-modified lead titanate
Author :
Kato, Kihiro ; Tsukada, Shinya ; Kano, Jun ; Yamamoto, Takashi ; Kojima, Seiji
Author_Institution :
Univ. of Tsukuba, Ibaraki
Volume :
54
Issue :
12
fYear :
2007
fDate :
12/1/2007 12:00:00 AM
Firstpage :
2599
Lastpage :
2602
Abstract :
The paraelectric to ferroelectric phase transitions were studied by Raman scattering in Ca-doped lead titanate ceramics. The soft optic modes responsible for the ferroelectric phase transitions were clearly observed. The A1 (1TO) mode, which softens toward Tc, contains four sub-peaks. The frequencies of these subpeaks depend to a great extent on the Ca content and the temperature. These behaviors are discussed on the basis of the anharmonicity of lattice vibrations.
Keywords :
Raman spectra; ferroelectric transitions; lead compounds; soft modes; PbTiO3; Raman scattering; ferroelectric phase transitions; lattice vibrations anharmonicity; paraelectric to ferroelectric phase transitions; soft optic modes; Ceramics; Dielectric measurements; Ferroelectric materials; Lattices; Optical scattering; Powders; Raman scattering; Temperature dependence; Titanium compounds; Wavelength measurement; Calcium; Lead; Light; Materials Testing; Scattering, Radiation; Spectrum Analysis, Raman; Temperature; Titanium;
fLanguage :
English
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-3010
Type :
jour
DOI :
10.1109/TUFFC.2007.585
Filename :
4430049
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=1034186
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