| Raman spectroscopic study of ceramic Sr2Bi4Ti5O18 |
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| 引用本文： | 杜朝玲,张善涛,卢明辉,顾正彬,程光煦,王佳,陈延峰. Raman spectroscopic study of ceramic Sr2Bi4Ti5O18[J]. 中国物理, 2006, 15(4): 854-858 |
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| 作者姓名： | 杜朝玲 张善涛 卢明辉 顾正彬 程光煦 王佳 陈延峰 |
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| 作者单位： | National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China;National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering,Nanjing University, Nanjing 210093, China;National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering,Nanjing University, Nanjing 210093, China;National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering,Nanjing University, Nanjing 210093, China;National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China;National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China;National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering,Nanjing University, Nanjing 210093, China |
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| 基金项目： | Project supported by the State Key Development Program for Basic Research of China (Grant No 001CB610404). |
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| 摘 要： | 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 464cm^-1 indicate that the latter phonon mode is more anharmonic than the former one.
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| 关 键 词： | 拉曼分光镜 拉曼光谱 非谐位势 声子模式 |
| 收稿时间： | 2005-09-20 |
| 修稿时间： | 2005-09-202005-11-24 |
Raman spectroscopic study of ceramic Sr2Bi4Ti5O18 |
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| Du Chao-Ling,Zhang Shan-Tao,Lu Ming-Hui,Gu Zheng-Bin,Cheng Guang-Xu,Wang Jia and Chen Yan-Feng. Raman spectroscopic study of ceramic Sr2Bi4Ti5O18[J]. Chinese Physics, 2006, 15(4): 854-858 |
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| Authors: | Du Chao-Ling Zhang Shan-Tao Lu Ming-Hui Gu Zheng-Bin Cheng Guang-Xu Wang Jia Chen Yan-Feng |
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| Affiliation: | National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering,Nanjing University, Nanjing 210093, China; National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China |
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| Abstract: | Raman spectra of ceramic Sr2Bi4Ti5O18 (SBTi5) arereported 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 afunction of temperature. Theoretical fittings of the FWHMs for the two modes at around 312,cm-1 and 464,cm-1 indicate that the latter phononmode is more anharmonic than the former one. |
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| Keywords: | Raman spectra anharmonic potential superposition phonon mode |
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