Central peak in SrTi18O3 studied by light scattering

被引：0

作者：

Tsujimi, Y ^{[1
]}

Hasebe, H

Wang, RP

Itoh, M

机构：

[1] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0600812, Japan

[2] AIST, Nanoelect Res Inst, Tsukuba, Ibaraki 3058561, Japan

[3] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

来源：

FERROELECTRICS | 2005年 / 314卷

关键词：

(SrTiO3)-O-18; ferroelectricity; phase transition; light scattering; central peak;

D O I：

10.1080/00150190590926193

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A central peak (CP) has been found mainly in the VH light scattering spectra of SrTi(O-18(0.87)16 O-0.13)(3) (87% O-18-exchanged SrTiO3). Both of the intensity and relaxation time of the CP show broad peaks around T-m approximate to 22 K (below the transition temperature T, 25 K). The physical origin of the CP is determined not to be the polarization fluctuation, representing that this CP is not a sign of a phase transition of order-disorder type. The stochastic fluctuation of the spatial derivatives of the polarization would be the physical origin of the CP.

引用

页码：79 / 83

页数：5

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