Electrostatic potential analysis of ferroelectric domains using convergent-beam electron diffraction

使用会聚束电子衍射对铁电域进行静​​电势分析

• 批准号: 20340070
• 负责人: TSUDA Kenji
• 金额: $ 11.9万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20340070/
• 关键词: 誘電体物性; 静電ポテンシャル分布; 電子顕微鏡; 収束電子回折(CBED); 電子線ホログラフィー

An electrostatic potential analysis method using convergent-beam electron diffraction has been successfully developed, which enables us to determine electrostatic potential distribution from a nanometer-scale specimen area. Using this method, ferroelectric polarizations of ferroelectric materials such as LiNbO3 were observed through electrostatic potential. The method was also applied to visualization of orbital ordered states of 3d electrons in strongly-correlated electron systems.

本文成功地建立了一种利用会聚束电子衍射分析静电电位的方法，使我们能够在纳米尺度的样品区域内确定静电电位的分布。利用该方法，通过静电势观察了LiNbO3等铁电材料的铁电极化。该方法还应用于强相关电子系统中三维电子轨道有序态的可视化。

项目成果

An analysis of crystal structure of Ca-deficient oxonitiridoaluminosilicate Ca_<0. 88> Al_<0. 91> Si_<1. 09> N_<2. 85O0. 15>

缺钙氧硝基硅铝酸盐Ca_<0的晶体结构分析。

• 发表时间: 2009
• 期刊: J. Ceram. Soc. Jpn.
• 作者: Kyota Uheda;Hajime Yamamoto;Hisanori Yamane;Wataru Inami;Kenji Tsuda;Yoshinobu Yamamoto and Naoto Hirosaki
• 通讯作者: Yoshinobu Yamamoto and Naoto Hirosaki

電子線による局所構造解析

使用电子束进行局部结构分析

• 发表时间: 2010
• 作者: M.Okawa;Y.Yakata;ほか13名;Ryo Fukaya;津田健治
• 通讯作者: 津田健治

Re-examination of the crystal structure of the beta-pyrochlore oxide sup erconductor KO_<s2>O_<6> by X-ray and convergent-beam electron diffraction a nalyses

X射线和会聚束电子衍射复查β-烧绿石氧化物超导体KO_<s2>O_<6>晶体结构

• 发表时间: 2009
• 期刊: Solid State Communications 149
• 作者: JI. Yamaura;Z. Hiroi;K. Tsuda;K. Izawa;Y. Ohishi;S. Tsutsui
• 通讯作者: S. Tsutsui

Structure of Ferroelectric Silver Niobate AgNbO3

• DOI: 10.1021/cm103389q
• 发表时间: 2011-03
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: M. Yashima;S. Matsuyama;R. Sano;M. Itoh;K. Tsuda;D. Fu

Construction of Structural Phase Diagram of LaGa_<1-x> Mg_xO_<3-δ> by Using Various Diffraction Measurements and Thermal Analyses Effect of Long Period Anti-Phase Domain Structure on Phase Diagram

利用各种衍射测量和热分析构建LaGa_<1-x> Mg_xO_<3-δ>结构相图长周期反相域结构对相图的影响

• 发表时间: 2009
• 期刊: Electrochemistry
• 影响因子: 2.5
• 作者: Takeshi Ohzeki;Yoichiro Ogata;Kenji Tsuda and Takuya Hashimoto
• 通讯作者: Kenji Tsuda and Takuya Hashimoto