Rchr
J-GLOBAL ID:200901076227575950   Update date: Sep. 28, 2024

Ohwada Kenji

オオワダ ケンジ | Ohwada Kenji
Affiliation and department:
Homepage URL  (1): https://www.qst.go.jp/site/kansai-sr/20490.html
Research field  (3): Semiconductors, optical and atomic physics ,  Magnetism, superconductivity, and strongly correlated systems ,  Crystal engineering
Research keywords  (14): 構造物性 ,  ナノ結晶 ,  強誘電体 ,  リラクサー強誘電体 ,  構造相転移 ,  domain bounary ,  domain ,  ヘテロ相ゆらぎ ,  ナノスケール ,  電荷不均化 ,  金属絶縁体転移 ,  放射光X線散乱 ,  コヒーレントX線 ,  中性子散乱
Research theme for competitive and other funds  (23):
  • 2023 - 2028 1000 T結晶格子の探索と解明
  • 2023 - 2028 Promotion of the 1000-Tesla science
  • 2022 - 2025 デバイス深部に実装された結晶性ナノ粒子の特性解明に資する構造可視化技術の開発
  • 2020 - 2023 Formation of edge state and optical Tamm state inside crystalline specimen using spatial phase modulation of X-ray beam
  • 2019 - 2022 μeV~neV領域の超単色X線回折法の開発と物質ダイナミクス研究への応用
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Papers (115):
  • Norihiro Oshime, Kenji Ohwada, Akihiko Machida, Nagise Fukushima, Kosuke Shirakawa, Shintaro Ueno, Ichiro Fujii, Satoshi Wada, Kento Sugawara, Ayumu Shimada, et al. Lattice strain visualization inside a 400 nm single grain of BaTiO3 in polycrystalline ceramics by Bragg coherent X-ray diffraction imaging. Japanese Journal of Applied Physics. 2023. 62. SM. SM1022
  • Shinya Tsukada, Yasuhiro Fujii, Akari Kanagawa, Yukikuni Akishige, Kenji Ohwada. Polarization behavior in a compositionally graded relaxor-ferroelectric crystal visualized by angle-resolved polarized Raman mapping. Communications Physics. 2023
  • Yoshiki Kohmura, Kenji Ohwada, Nobuki Kakiuchi, Kei Sawada, Tadaaki Kaneko, Jun'ichiro Mizuki, Masaichiro Mizumaki, Tetsu Watanuki, Tetsuya Ishikawa. X-ray two-beam topography for quantitative derivation of phase shift by crystalline dislocations. Physical Review Research. 2023. 5. 1
  • Takumi Nishikubo, Takashi Imai, Yuki Sakai, Masaichiro Mizumaki, Shogo Kawaguchi, Norihiro Oshime, Ayumu Shimada, Kento Sugawara, Kenji Ohwada, Akihiko Machida, et al. Polar-Nonpolar Transition-Type Negative Thermal Expansion with 11.1% Volume Shrinkage by Design. Chemistry of Materials. 2023
  • Norihiro Oshime, Kenji Ohwada, Akihiko Machida, Nagise Fukushima, Shintaro Ueno, Ichiro Fujii, Satoshi Wada, Kento Sugawara, Ayumu Shimada, Tetsuro Ueno, et al. The ferroelectric phase transition in a 500 nm sized single particle of BaTiO3 tracked by coherent X-ray diffraction. JAPANESE JOURNAL OF APPLIED PHYSICS. 2022. 61. SN
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MISC (118):
  • 西久保匠, 西久保匠, 今井孝, 酒井雄樹, 酒井雄樹, 水牧仁一朗, 河口彰吾, 大和田謙二, 町田晃彦, 綿貫徹, et al. Domain Structure Observation and Design of Negative Thermal Expansion Utilizing Giant Volume Change under Pressure of PbVO3. 日本セラミックス協会秋季シンポジウム講演予稿集(Web). 2023. 36th
  • 大和田謙二, 押目典宏, 菅原健人, 島田歩, 町田晃彦, 綿貫徹, 黒岩芳弘. ブラッグコヒーレントX線回折イメージング法によるナノ結晶非破壊3次元イメージング. 分析電子顕微鏡討論会予稿集. 2023. 38th
  • 押目典宏, 大和田謙二, 町田晃彦, 菅原健人, 島田歩, 上野哲朗, 綿貫徹, 石井賢司, 豊川秀訓, 豊川秀訓, et al. Nondestructive visualization of the external shape and internal strain distribution for a single crystalline particle of tens to hundreds of nm size using Bragg coherent X-ray diffraction imaging. 日本物理学会講演概要集(CD-ROM). 2023. 78. 2
  • 西久保匠, 西久保匠, 今井孝, 酒井雄樹, 酒井雄樹, 水牧仁一朗, 大和田謙二, 町田晃彦, 綿貫徹, 押目典宏, et al. Design of Negative Thermal Expansion of PbVO3 by Utilizing Giant Volume Change under Pressure and Observation of Domain Structure. 日本物理学会講演概要集(CD-ROM). 2023. 78. 2
  • 塚田真也, 塚田真也, 藤井康裕, 金川茜里, 秋重幸邦, 大和田謙二. Angle-resolved polarized Raman mapping and multivariate curve resolution of a composition-gradient relaxor-ferroelectric crystal. 日本物理学会講演概要集(CD-ROM). 2022. 77. 2
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Patents (1):
  • X線回折測定法およびX線回折測定装置
Books (1):
  • 日本の結晶学 : その輝かしい発展 2(日本結晶学会「日本の結晶学 (II) 」出版編集委員会 編 日本結晶学会 2014)
    日本結晶学会 2014
Lectures and oral presentations  (64):
  • 3D Imaging of Nanocrystals by Coherent X-ray Diffraction
    (15th International Symposium on Ferroic Domains & Micro-to Nano-scopic Structures (ISFD-15) 2022)
  • 結晶からX線波面へのらせん構造の転写について
    (日本放射光学会年会・放射光科学合同シンポジウム(Web) 2021)
  • コヒーレントX線を利用したナノ結晶の構造解析
    (日本顕微鏡学会第63回シンポジウム「顕微鏡オンラインフォーラム2020」共催セッション「微細構造解析プラットフォーム特別講演会(成果事例報告)」 2020)
  • コヒーレントX線回折を利用したBaTiO3ナノ結晶の3次元イメージング II
    (第37回強誘電体会議(FMA37) 現地開催中止、研究発表は成立とする。 2020)
  • 3D imaging of BaTiO3 nano-crystals by using coherent X-ray diffraction
    (2020)
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Education (2):
  • 1996 - 2001 The University of Tokyo Graduate School of Science Department of Physics
  • 1992 - 1996 Kwansei Gakuin University Faculty of Science Department of Physics
Professional career (1):
  • Ph.D (The University of Tokyo)
Work history (12):
  • 2019/04 - 現在 National Institutes for Quantum Science and Technology Synchrotron Radiation Research Center Group Leader
  • 2016/04 - 現在 Kwansei Gakuin University School of Science and technology Guest professor
  • 2019/10 - 2020/03 Hiroshima University Graduate School of Science Guest professor
  • 2019/03 - 2019/03 Shimane University
  • 2016/04 - 2019/03 National Institutes for Quantum and Radiological Science and Technology Synchrotron Radiation Research Center 上席研究員
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Committee career (9):
  • 2022/04 - 現在 一般社団法人日本結晶学会 日本結晶学会編集委員
  • 2014 - 現在 International Workshop on Relaxor Ferroelectrics (IWRF) International Advisory Board
  • 2022/04 - 2024/03 一般社団法人 日本物理学会 会誌編集委員(第78期~第79期)
  • 2020/04 - 2022/03 The Crystallographic Society of Japan Editorial Committee, The Crystallographic Society of Japan
  • 2018/04 - 2022/03 SPRUC (SPring-8 User Community) 行事幹事(秋の学校担当)
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Awards (1):
  • 2008/01 - The Materials Research Society of Japan Award for Encouragement of Research Intrinsic ferroelectric instability in Pb(In1/2Nb1/2)O3 : Inelastic x-ray scattering in control of the B-site randomness
Association Membership(s) (4):
The Dielectric Society of Japan ,  THE CRYSTALLOGRAPHIC SOCIETY OF JAPAN ,  THE JAPANESE SOCIETY FOR SYNCHROTRON RADIATION RESEARCH ,  THE PHYSICAL SOCIETY OF JAPAN
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