| Raman spectroscopic study of ceramic Sr2Bi4Ti5O18 |
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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 B,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 and Chen Yan-Feng |
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| Institution: | 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) 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. |
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| Keywords: | Raman spectra anharmonic potential superposition phonon mode |
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