Raman scattering study of La-, Nd- and Sm-substituted Bi4Ti3O12

被引：29
|
作者：
Wu, D [1 ]
Deng, Y
Mak, CL
Wong, KH
Li, AD
Zhang, MS
Ming, NB
机构：
[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Peoples R China
[3] Hong Kong Polytech Univ, Dept Appl Phys, Kowloon, Hong Kong, Peoples R China
[4] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
[5] Nanjing Univ, Ctr Mat Anal, Nanjing 210093, Peoples R China
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2005年 / 80卷 / 03期
关键词：
D O I：
10.1007/s00339-003-2244-z
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Raman modes of bismuth-layered perovskite Bi4-xLaxTi3O12 ceramic samples were studied as a function of La content from x = 0.00 to 0.75. In the low-wavenumber region ( 35 similar to 150 cm(-1)), the rigid mode was found to be insensitive to La substitution, while the compositional change caused a frequency upshift of one of the soft modes. In the high-wavenumber region, the results indicated that a structure transition from orthorhombic to tetragonal may occur above x = 0.75, since the B-2g and B-3g modes showed evidence of coalescence into E-g modes with increasing La content. Raman spectra of Bi3.25Nd0.75Ti3O12 and Bi3.25Sm0.75Ti3O12 are presented and compared with Bi4-xLaxTi3O12.
引用
收藏
页码：607 / 610
页数：4
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