2013 Fiscal Year Final Research Report
In-situ and atomic-scale observation of nano-scale ferroelectric domain structure
| Project/Area Number |
23760632
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SATO Yukio 東京大学, 工学(系)研究科(研究院), 助教 (80581991)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 強誘電体 / ドメイン / 圧電体 / 透過型電子顕微鏡法 / その場観察 / 結晶構造 / 電子回折 / 原子配列 |
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| Research Abstract |
Piezoelectric material, which deforms largely when electrical voltage is applied, is widely used in a variety of practical applications. Particularly, PMN-PT, a representative piezoelectric material, exhibits very high piezoelectricity. However, mechanism of the high piezoelectricity has not yet been clarified.
In the present study, in order to understand the origin of high piezoelectricity, in-situ transmission electron microscopy (TEM) and atomic resolution scanning TEM observations were carried out.
We have for the first time visualized the response of ferroelectric nanodomains to the applied electrical voltage, where the ferroelectric nanodomains are characteristic structure in PMN-PT. On the basis of results obtained in this research project, we have proposed that response of ferroelectric nanodomains plays very important role in the generation of very high piezoelectricity of this material.
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[Remarks] 日経産業新聞 「圧電材料の分子観察」,平成23年11月9日 新聞発表
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[Remarks] 日刊工業新聞 「圧電セラのナノ領域応答,即時直接観察に成功」,平成23年10月31日 新聞発表
