Title of article
The composition dependence and new assignment of the Raman spectrum in lithium tantalate
Author/Authors
Shi، نويسنده , , Lihong and Kong، نويسنده , , Yongfa and Yan، نويسنده , , Wenbo and Liu، نويسنده , , Hongde and Li، نويسنده , , Xiaochun and Xie، نويسنده , , Xiang and Zhao، نويسنده , , Di-Hua Sun، نويسنده , , Lei and Xu، نويسنده , , Jingjun and Sun، نويسنده , , Jun and Chen، نويسنده , , Shaolin and Zhang، نويسنده , , Ling and Huang، نويسنده , , Ziheng and Liu، نويسنده , , Shiguo and Zhang، نويسنده , , Wanlin and Zhang، نويسنده , , Guangyin، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
6
From page
251
To page
256
Abstract
The Raman scattering spectra of lithium tantalate crystals with different compositions were investigated. The comparison of the Raman data obtained for the congruent and the near-stoichiometric crystals reveals some differences in the shape and the number of Raman peaks, which lead to a new assignment of the long-wavelength optical phonons. And quantitative relationships between the linewidth of Raman peaks (142 cm−1 for E-phonon and 861 cm−1 for A1-phonon) and the crystal composition were firstly presented. Two local Raman lines, 278 and 750 cm−1, were found for the congruent crystals and attributed to the intrinsic defects, Li vacancy and anti-site Ta ion, respectively.
Keywords
A. Lithium tantalate , E. Raman spectrum , C. Crystal stoichiometry , C. Defects
Journal title
Solid State Communications
Serial Year
2005
Journal title
Solid State Communications
Record number
1790048
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