Local structure analysis and polarization mapping of polarization nano domains of ferroelectrics using STEM-CBED

2015 Fiscal Year Final Research Report

• Project/Area Number: 25287068
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Tohoku University
• Principal Investigator: Tsuda Kenji 東北大学, 多元物質科学研究所, 教授 (00241274)
• Co-Investigator(Renkei-kenkyūsha): TERAUCHI Masami 東北大学, 多元物質科学研究所, 教授 (30192652) ; NISHIMATSU Takeshi 東北大学, 金属材料研究所, 助教 (70323095)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 収束電子回折 / 電子顕微鏡 / STEM-CBED法 / 誘電体物性 / 構造相転移

Outline of Final Research Achievements

A new method has been developed for investigating two-dimensional distributions of nanometer-scale local structures, with the combined use of scanning transmission electron microscopy and convergent-beam electron diffraction (STEM-CBED). The STEM-CBED system was constructed on an energy-filter transmission electron microscopy JEM-2010FEF. The method was applied to perovskite-type ferroelectrics such as barium titanate (BaTiO3), nanometer scale local structures were investigated below and above their ferroelectric phase transitions. Nanometer-scale fluctuations of polarization clusters were successfully observed

Free Research Field

電子線結晶学，固体物理