Temperature dependence of Raman scattering spectra of internal modes in Tb2(MoO4)3

被引：7
|
作者：
Sakai, A [1 ]
Islam, E
Onodera, A
Strukov, BA
机构：
[1] Muroran Inst Technol, Dept Elect & Elect Engn, Muroran, Hokkaido 050, Japan
[2] Hokkaido Univ, Fac Sci, Dept Phys, Sapporo, Hokkaido 060, Japan
[3] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, Russia
来源：
FERROELECTRICS | 1997年 / 203卷 / 1-4期
关键词：
Tb-2(MoO4)(3); ferroelectrics; phase transition; Raman scattering; internal mode;
D O I：
10.1080/00150199708012834
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Raman scattering spectra of the ferroelectric Tb-2(MoO4)(3) single crystal have been observed by using a micro-Raman scattering technique with a special attention to the internal modes of MoO4 molecules. A symmetrical consideration of MoO4 molecular sites is made in the paraelectric phase. Observed Raman peaks are well assigned to the internal modes of MoO4. New internal modes appear and grow up below the phase transition temperature. The temperature dependence of the intensity of the new mode is in good agreement with that of the spontaneous polarization. It is concluded that this mode is assigned to the mode at the M-point of the Brillouin zone in the paraelectric phase.
引用
收藏
页码：87 / 94
页数：8
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