Development of inverse photoelectron holography targeting light elements and its application to advanced materials
| Project/Area Number |
16H03849
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied materials
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| Research Institution | Nagoya Institute of Technology |
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Principal Investigator |
HAYASHI Koichi 名古屋工業大学, 工学(系)研究科(研究院), 教授 (20283632)
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| Co-Investigator(Kenkyū-buntansha) |
木村 耕治 名古屋工業大学, 工学(系)研究科(研究院), 助教 (20772875)
廣瀬 靖 東京大学, 大学院理学系研究科(理学部), 准教授 (50399557)
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2016: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
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| Keywords | 逆光電子ホログラフィー / 局所構造 / 軽元素 / 三次元原子像 / 複合アニオン化合物 / ３D原子イメージング / 酸窒化物 / 電子顕微鏡 / ホログラフィー / 窒化ガリウム / 局所ｌ構造 |
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| Outline of Final Research Achievements |
Inverse photoelectron holography is a relatively new technique in atomic resolution holography that can reproduce a 3D atomic arrangement around a specific element. Holograms of light elements can be easily measured using an electron beam in an electron microscope. In order to make use of this feature, we attempted to measure holograms of atomic arrangement around oxygen in SrTiO3 single crystal by detecting the oxygen characteristic X-rays, and successfully reconstructed clear atomic images. Next, in order to apply this technique, we measured nitrogen and oxygen holograms in SrTaO2N thin films. It was found that the contrast of the hologram pattern of nitrogen was higher than that of oxygen, and that the local structure around nitrogen was more ordered than that around oxygen.
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| Academic Significance and Societal Importance of the Research Achievements |
蛍光X線ホログラフィーや光電子ホログラフィーなどの原子分解能ホログラフィーは、大型放射光実験施設をベースに発展してきたが、実験遂行までに半年程度以上の期間を要す。そのような中、逆光電子ホログラフィーの開発により、研究室ベースで時間を置かずに原子分解能ホログラムを測定できるようになった。近年、軽元素戦略における材料開発や複合アニオン化合物の探索などが盛んに行われているが、酸素などの複数のアニオンのホログラムを同時に測定できる本手法は、これらの材料分野における局所構造解析に対して有効である。
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Report
(4 results)
Research Products
(18 results)
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[Presentation] Element Selective Local Structural Analysis of the Pb(Fe1/2Nb1/2)O3 Multiferroic Material using X ray Fluorescence Holography2019
Author(s)
Koji Kimura, Rikuya Kondo, Daisuke Urushihara, Yuta Yamamoto, Artoni Kevin R. Ang, Kouhei Yokochi, Naohisa Happo, Koji Ohara, Tomohiro Matsushita, Toru Asaka, Makoto Iwata , Kouichi Hayashi
Organizer
14th International Conference on the Structure of Non-Crystalline Materials
Related Report
Int'l Joint Research
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