Static effective charges of BaTiO3:: Infrared spectroscopic ellipsometry study -: art. no. 052106

被引：9
|
作者：
Huang, ZM [1 ]
Chu, JH [1 ]
Wu, YN [1 ]
Hou, Y [1 ]
Xue, JQ [1 ]
Tang, DY [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China
来源：
PHYSICAL REVIEW B | 2005年 / 72卷 / 05期
关键词：
D O I：
10.1103/PhysRevB.72.052106
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The dielectric function of the perovskite BaTiO3 is studied by infrared spectroscopic ellipsometry in the temperature range of 20-150 degrees C. A ferroelectricity-induced change of the spectral weight of the dielectric function is observed from a cubic to tetragonal structure transition. The ellipsometric data provide detailed information about the evolution of the ionic static effective charge in the cubic and ferroelectricity states. The determination of the temperature-dependent spontaneous macroscopic polarization is deduced in terms of the charge transfer of the static effective charge.
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页数：4
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