| 钛酸铅纳米晶的拉曼光谱研究 |
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| 引用本文： | 傅宏刚,赵冰.钛酸铅纳米晶的拉曼光谱研究[J].光散射学报,1999,11(2):127-131. |
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| 作者姓名： | 傅宏刚 赵冰 |
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| 作者单位： | [1]黑龙江大学化学化工学院 [2]吉林大学超分子结构与谱学开放实验室 |
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| 基金项目： | 黑龙江省自然科学基金,黑龙江大学杰出青年科学基金 |
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| 摘 要： | 本文测定了不同粒径的钛酸铅纳米晶的ＦＴ Ｒａｍａｎ光谱，确定了各光学声子模的归属，发现Ａ１（１ＴＯ）声子峰的多重劈裂特征，支持了Ｆｏｓｔｅｒ等人的非谐性振动模型。粒径和温度的变化将使声子频率发生位移并带来峰宽的变化，Ａ１（ＴＯ）模比对应的Ｅ（ＴＯ）模频移速度快，当由铁电相到达居里点时，二者将在某一较低频率处汇合。
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| 关 键 词： | 钛酸铅 纳米晶 拉曼光谱 软模 声子 |
FT Raman Spectroscopic Research on Lead Titanate Nanocrystals |
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| FU Hong gang,ZHAO Bing,DING Zhi li,YU Hai tao,ZHANG Xin,QIANG Liang sheng,WANG Xu,XU Wei qing.FT Raman Spectroscopic Research on Lead Titanate Nanocrystals[J].Chinese Journal of Light Scattering,1999,11(2):127-131. |
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| Authors: | FU Hong gang ZHAO Bing DING Zhi li YU Hai tao ZHANG Xin QIANG Liang sheng WANG Xu XU Wei qing |
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| Institution: | 1FU Hong gang,2ZHAO Bing,3DING Zhi li,1YU Hai tao,1ZHANG Xin,3QIANG Liang sheng,2WANG Xu,2XU Wei qing |
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| Abstract: | FT Raman spectra of lead titanate nanocrystals of different grain sizes were measurcd and all optical phonon modes were assigned. The result indicated that the A 1(1TO) phonon appears to be split into multiple peaks which supported the anharmonic vibration model proposed by Foster et al. Changing the grain size and temperature can down shift the phonon frequency lower and broaden width. Furthemore, Below T c the frenquency of the A 1(iTO) mode downshifts faster than corresponding E(iTO) mode. |
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| Keywords: | lead titanate nanocrystal FT Raman soft mode phonon |
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