Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/7969
Title: Raman scattering study of La-, Nd- And Sm-substituted Bi4Ti 3O12
Authors: Wu, D
Deng, Y
Mak, CL 
Wong, KH
Li, AD
Zhang, MS
Ming, NB
Issue Date: 2005
Source: Applied physics a : materials science and processing, 2005, v. 80, no. 3, p. 607-610 How to cite?
Journal: Applied Physics A: Materials Science and Processing 
Abstract: Raman modes of bismuth-layered perovskite Bi4-xLa xTi3O12 ceramic samples were studied as a function of La content from x = 0.00 to 0.75. In the low-wavenumber region (35 - 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 B2g and B3g modes showed evidence of coalescence into Eg modes with increasing La content. Raman spectra of Bi 3.25Nd0.75Ti3O12 and Bi 3.25Sm0.75Ti3O12 are presented and compared with Bi4-xLaxTi3O12.
URI: http://hdl.handle.net/10397/7969
ISSN: 0947-8396
DOI: 10.1007/s00339-003-2244-z
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