| 67 Pb(Mg1/3Nb2/3)O3-33PbTiO3单晶90铁电畴光学研究 |
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| 引用本文： | 李东林,王评初,罗豪甦,殷之文.67 Pb(Mg1/3Nb2/3)O3-33PbTiO3单晶90铁电畴光学研究[J].无机材料学报,2000,15(4). |
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| 作者姓名： | 李东林 王评初 罗豪甦 殷之文 |
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| 作者单位： | 中国科学院上海硅酸盐研究所, 上海 200050 |
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| 基金项目： | 国家自然科学基金，中国科学院上海硅酸盐研究所资助项目，上海市科委资助项目 |
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| 摘 要： | 采用偏光显微镜观察了67Pb(Mg1/3Nb2/3)O3-33PbTiO3固溶体铁电单晶在室温时90铁电畴结构.铁电畴结构与晶体质量有关，在正交偏光显微镜下光学透明晶体中存在着尺寸为23mm的均匀大畴，不同极化方向的大畴重叠形成雾状区,使晶体表现出光学质量宏观不均匀.在光学质量差的雾状晶体中则存在着0.1mm宽的110型带状孪生畴，使晶体形成表面浮凸，带状畴内还存在着90°亚畴.并对这些畴的形成作了讨论
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| 关 键 词： | Pb(Mg1/3Nb2/3)O3基单晶 弛豫铁电体 铁电畴 孪生 马氏体转变 |
Optical Micoscope Study of 90 Ferroelectric Domain in 67 Pb(Mg1/3Nb2/3) O3-33PbTiO3 Solid Solution Single Crystal |
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| LI Dong-lin,WANG Ping-Chu,LUO Hao-su,YIN Zhi-Wen.Optical Micoscope Study of 90 Ferroelectric Domain in 67 Pb(Mg1/3Nb2/3) O3-33PbTiO3 Solid Solution Single Crystal[J].Journal of Inorganic Materials,2000,15(4). |
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| Authors: | LI Dong-lin WANG Ping-Chu LUO Hao-su YIN Zhi-Wen |
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| Abstract: | 90 Ferroelectric domains in 67 Pb(Mg1/3Nb2/3) O3-33PbTiO3 single crystal were observed at room temperature by using crossed polarized light microscope(PLM). Ferroelectric domain structures depend on the quality of single crystals. Large homogeneous domains of 23mm exist in optical transparent single crystals. Large domains with different polarization orientation overlap to form opaque regions. 110 type 90 banded a-a domain with 90 sub-domain can be observed in translucent crystals. The dimension of banded twin is about 0.1mm. As a result, surface relief appears on translucent crystal surface. The mechanism of forming these domains was discussed. |
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| Keywords: | Pb(Mg1/3Nb2/3) O3-based crystal relaxor ferroelectrics ferroelectric domain twin marstensitic transition |
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