Study of phase transitions in hexagonal BaTiO3 by means of far-infrared spectroscopy

被引:0
|
作者
Buixaderas, E [1 ]
Kamba, S
Petzelt, J
Wada, M
Yamanaka, A
Inoue, K
机构
[1] Acad Sci Czech Republ, Inst Phys, CZ-18040 Prague 8, Czech Republic
[2] Shinshu Univ, Fac Sci, Dept Phys, Matsumoto, Nagano 390, Japan
[3] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 060, Japan
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中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Polarized infrared reflection spectra of hexagonal BaTiO3 were obtained and evaluated in the region 12-2000 cm(-1) at temperatures 10-300 K. Soft polar phonon observed in recent hyper-Raman scattering experiment exhibit smaller temperature dependence in our FIR spectra. Anomalously strong temperature dependence of the damping of the mode near 100 cm(-1) indicates large anharmonicity at high temperatures.
引用
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页码:S578 / S580
页数:3
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