PbTiO_3 /SrTiO_3(001)复杂畴组态和缺陷的研究
Study of complex domain configuration and lattice defects in PbTiO_3 /SrTiO_3 (001) thin films
查看参考文献20篇
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文摘
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用透射电子显微镜对PbTiO_3 /SrTiO_3 (001)薄膜内部所形成的复杂畴组态以及畴壁处的位错进行了系统的研究。透射电镜结果和几何相位分析(GPA)表明,薄膜内部两个交叉的a畴内部出现了180°畴壁,导致在局部区域形成了全闭合畴结构,在铁电畴壁处观察到高密度位错。高分辨HAADF-STEM像分析显示,在90°畴壁处容易形成a < 011 >型位错,在180°畴壁处容易形成a < 100 >型位错,表明位错的形成与铁电畴壁类型存在强耦合关系。 |
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其他语种文摘
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The complex domain configuration and lattice defects at domain walls in ferroelectric PbTiO_3 thin films grown on SrTiO_3 (001) substrates were investigated by transmission electron microscopy (TEM). TEM results and geometry phase analysis (GPA) show that the 180° domain wall forms at the intersections of a domains and further generates flux-closure domain structures. Atomicscale HAADF-STEM images reveal high density dislocations at ferroelectric domain walls,which have Burgers vectors of a < 011 > and a < 100 >,respectively. The a < 011 > dislocations are mainly located around 90° domain walls,while the a < 100 > dislocations are mainly around 180° domain walls. |
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来源
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电子显微学报
,2018,37(6):556-562 【扩展库】
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DOI
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10.3969/j.issn.1000-6281.2018.06.002
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关键词
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铁电薄膜
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畴组态
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铁电畴壁
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晶格缺陷
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地址
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1.
中国科学院金属研究所, 沈阳材料科学国家(联合)实验室, 辽宁, 沈阳, 110016
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中国科学院大学, 北京, 100049
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兰州理工大学材料科学与工程学院, 甘肃, 兰州, 730050
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-6281 |
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学科
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晶体学;一般工业技术;金属学与金属工艺 |
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基金
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国家自然科学基金资助项目
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中国科学院前沿重点研究项目资助
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文献收藏号
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CSCD:6399439
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