%0 Journal Article
%T Raman spectroscopic study of ceramic Sr2Bi4Ti5O18
%A Du Chao-Ling
%A Zhang Shan-Tao
%A Lu Ming-Hui
%A Gu Zheng-Bin
%A Cheng Guang-Xu
%A Wang Jia
%A Chen Yan-Feng
%A <br>杜朝玲
%A 张善涛
%A 卢明辉
%A 顾正彬
%A 程光煦
%A 王　佳
%A 陈延峰
%J 中国物理 B
%D 2006
%I 
%X Raman spectra of ceramic Sr2Bi4Ti5O18 (SBTi5) are reported to consist of four different Raman bands.Temperature-dependent spectra reveal the relationship between the lattice vibration and the material's structure. There appears a relatively large change in structure of the material at about 273K.The anharmonic potential of the material has a great influence on its phonon mode full width at half maximum (FWHM), which can be expressed by a function of temperature. Theoretical fittings of the FWHMs for the two modes at around 312\,cm-1 and 464\,cm-1 indicate that the latter phonon mode is more anharmonic than the former one.
%K Raman spectra
%K anharmonic potential
%K superposition
%K phonon mode<br>拉曼分光镜
%K 拉曼光谱
%K 非谐位势
%K 声子模式
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=25D4B2B02F17B205ECFE590C699B1848&yid=37904DC365DD7266&vid=23CCDDCD68FFCC2F&iid=E158A972A605785F&sid=8D95DD1211171525&eid=9596F7248FB5796B&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=29