Detailed Information

Research Field/Keywords for Research Field

• Solid state physics, Nano physics

Education

• 1997/03, Graduated
• 1999/03, Master Course, Completed
• 2002/03, Doctor Course, Completed

Employment Experience

• 2002/04 - 2005/03
• 2005/04 - 2007/03 Lecturer, Faculty of Science and Engineering, Saga University
• 2007/04 - 2010/03 Associate Professor, Physics, Faculty of Science and Engineering, Saga University
• 2010/04 -  *  Associate Professor, Physics, Graduate School of Science and Engineering, Saga University

Field of Specialization

• Condensed matter physics I, Condensed matter physics II, Nanostructural physics, Nanomaterials engineering, Applied materials

Research Topics and Results

• Invariable Simultaneous Emergence of Antiferromagnetic Order and Tetragonal Deformation in CoO Nanocrystals 2024/03
• Pressure-dependent electronic structure of the A-site ordered perovskite CaCu3Ti4O12 via x-ray Raman scattering 2024/01
• 理工系学生のための初歩からの力学 2023/03
• Correlation between ferromagnetism and dopant 3d metal-oxygen hybridized state lying at the bottom of conduction band in ZnO-based diluted magnetic semiconductor system 2021/12
• Corundum insulating phases in highly Ti-doped V2O3 nanocrystals 2020/01
• Influence of Processing Conditions on the Performance of Cu2ZnSnS4 Nanocrystal Solar Cells 2016/01
• Impurity-Induced First-order Phase Transitions in Highly Crystalline V2O3 Nanocrystals 2015/08
• Synthesis of Copper–Antimony-Sulfide Nanocrystals for Solution-Processed Solar Cells 2015/08
• Spontaneous uniaxial strain and disappearance of the metal-insulator transition in monodisperse V2O3 nanocrystals 2012/07
• Metal-insulator transition sustained by Cr-doping in V2O3 nanocrystals 2012/01
• Unusual low-temperature phase in VO2 nanoparticles 2010/09
• Metal–Insulator Transition for V2O3 Powder Observed　Using a Soft X-ray Emission Spectrometer 2010/05
• Giant negative thermal expansion in magnetic nanocrystals 2008/12
• Synthesis and Application of Stable Copper Oxide Nanoparticle Suspensions for Nanoparticulate Film Fabrication 2007/01

Books

• 理工系学生のための初歩からの力学;　2023/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  

Original Articles

• Invariable Simultaneous Emergence of Antiferromagnetic Order and Tetragonal Deformation in CoO Nanocrystals;　2024/03
  ANNOUNCEMENT INFO.;　Journal of Physical Society of Japan, 93 (2024) 044603
  AUTHOR;　Yoichi Ishiwata, Gaku Kawahara, Keisuke Akase, Taisuke Tominaga, Hayato Miyazaki, Hirofumi Ishii, Akira Matsuo, Koichi Kindo, Yuji Inagaki, Kenta Akashi, Tatsuya Kawae, Tetsuya Kida, Satoshi Suehiro, Masashi Nantoh, Koji Ishibashi
  
• Pressure-dependent electronic structure of the A-site ordered perovskite CaCu3Ti4O12 via x-ray Raman scattering;　2024/01
  ANNOUNCEMENT INFO.;　Physical Review B 109 (2024) 035132
  AUTHOR;　Yasuhisa Tezuka, Hojun Im, Takao Watanabe, Hirofumi Ishii, Nozomu Hiraoka, Yoichi Ishiwata, and Hitoshi Yamaoka
  
• Correlation between ferromagnetism and dopant 3d metal-oxygen hybridized state lying at the bottom of conduction band in ZnO-based diluted magnetic semiconductor system;　2021/12
  ANNOUNCEMENT INFO.;　Journal of Applied Physics 130 (2021) 243904
  AUTHOR;　Takuto Tsukahara, Satoshi An, Sho Otsuru, Yasuhisa Tezuka, Shunsuke Nozawa, Junichi Adachi, Kenta Akashi, Yuji Inagaki, Tatsuya Kawae, Hirofumi Ishii, Yen-Fa Liao, Tetsuya Kida, Satoshi Suehiro, Masashi Nantoh, Koji Ishibashi, and Yoichi Ishiwata
  
• Corundum insulating phases in highly Ti-doped V2O3 nanocrystals;　2020/01
  ANNOUNCEMENT INFO.;　Physical Review B 101 (2020) 035415
  AUTHOR;　Yoichi Ishiwata, Toru Maruyama, Sho Otsuru, Takuto Tsukahara, Hirofumi Ishii, Yen-Fa Liao, Ku-Ding Tsuei, Masaki Imamura, Kazutoshi Takahashi, Yuji Inagaki, Tatsuya Kawae, Tetsuya Kida, Satoshi Suehiro, Masashi Nantoh, and Koji Ishibashi
  
• Influence of Processing Conditions on the Performance of Cu2ZnSnS4 Nanocrystal Solar Cells;　2016/01
  ANNOUNCEMENT INFO.;　ChemistrySelect, 1 (2016) 86-92
  AUTHOR;　Tetsuya Kida, Keisuke Horita, Satoshi Suehiro,　Masayosh Yuasa, Armando T. Quitain,　Tooru Tanaka, Katsuhiko Fujita, Yoichi Ishiwata, and Kengo Shimanoe
  
• Impurity-Induced First-order Phase Transitions in Highly Crystalline V2O3 Nanocrystals;　2015/08
  ANNOUNCEMENT INFO.;　Advanced Materials Interfaces 2 (2015) 1500132
  AUTHOR;　Yoichi Ishiwata, Eiko Takahashi, Kenta Akashi, Masaki Imamura, Junpei Azuma, Kazutoshi Takahashi, Masao Kamada, Hirofumi Ishii, Yen-Fa Liao, Yasuhisa Tezuka, Yuji Inagaki, Tatsuya Kawae, Daisuke Nishio-Hamane, Masashi Nantoh, Koji Ishibashi, and Tetsuya Kida
  
• Synthesis of Copper–Antimony-Sulfide Nanocrystals for Solution-Processed Solar Cells;　2015/08
  ANNOUNCEMENT INFO.;　Inorganic Chemistry, 54 (2015) 7840
  AUTHOR;　Satoshi Suehiro, Keisuke Horita, Masayoshi Yuasa, Tooru Tanaka, Katsuhiko Fujita, Yoichi Ishiwata, Kengo Shimanoe, and Tetsuya Kida
  
• Spontaneous uniaxial strain and disappearance of the metal-insulator transition in monodisperse V2O3 nanocrystals;　2012/07
  ANNOUNCEMENT INFO.;　PHYSICAL REVIEW B, 86, 3, 035449
  AUTHOR;　Y. Ishiwata, S. Suehiro, T. Kida, H. Ishii, Y. Tezuka, H. Oosato, E. Watanabe, D. Tsuya, Y. Inagaki, T. Kawae, M. Nantoh, and K. Ishibashi
  
• Metal-insulator transition sustained by Cr-doping in V2O3 nanocrystals;　2012/01
  ANNOUNCEMENT INFO.;　Applied Physics Letters, 100, 4, 043103-1--3
  AUTHOR;　Yoichi Ishiwata, Tatsuya Shiraishi, Naoki Ito, Satoshi Suehiro, Tetsuya Kida, Hirofumi Ishii, Yasuhisa Tezuka, Yuji Inagaki, Tatsuya Kawae, Hirotaka Oosato, Eiichiro Watanabe, Daiju Tsuya, Masashi Nantoh, and Koji Ishibashi
  
• Unusual low-temperature phase in VO2 nanoparticles;　2010/09
  ANNOUNCEMENT INFO.;　Physical Review B, 82, 11, 115401-1-115401-7
  AUTHOR;　Y. Ishiwata, S. Suehiro, M. Hagihala, X. G. Zheng, T. Kawae, O. Morimoto, and Y. Tezuka
  
• Metal–Insulator Transition for V2O3 Powder Observed　Using a Soft X-ray Emission Spectrometer;　2010/05
  ANNOUNCEMENT INFO.;　Journal of the Physical Society of Japan, 79, 5, 054712-1-054712-3
  AUTHOR;　Yoichi ISHIWATA, Satoshi SUEHIRO, Yasuyuki SOI, Yasuhisa TEZUKA,Osamu　MORIMOTO, and Xu-Guang ZHENG
  
• Giant negative thermal expansion in magnetic nanocrystals;　2008/12
  ANNOUNCEMENT INFO.;　Nature Nanotechnology, 3, 12, 724-726
  AUTHOR;　X. G. Zheng, H. Kubozono, H. Yamada, K. Kato, Y. Ishiwata, C. N. Xu
  
• Synthesis and Application of Stable Copper Oxide Nanoparticle Suspensions for Nanoparticulate Film Fabrication;　2007/01
  ANNOUNCEMENT INFO.;　Journal of the American Ceramic Society, 90, 1, 107-110
  AUTHOR;　Tetsuya Kida, Takanori Oka, Masamitsu Nagano, Yoichi Ishiwata and Xu-Guang Zheng
  

Material, Commentary, Editorials, Research Report, A Comprehensive Journal Articles

• V2O3ナノ結晶の不純物誘起金属絶縁体転移;　2017/03
  ANNOUNCEMENT INFO.;　, 11, 2-8
  AUTHOR;　
  

General Lectures

• NiS2 ナノ結晶の磁気転移;　2023/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• V2O3/ZnO コアシェル型ナノ結晶の金属絶縁体転移;　2023/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CoO における正方晶歪みの発現機構の研究;　2022/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• NiSナノ結晶の金属絶縁体転移;　2022/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CrドープV2O3ナノ結晶の光電子分光;　2020/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• 六方最密構造NiCo 合金ナノ結晶の磁性と電子状態;　2019/11
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• 3d 遷移金属ドープZnO ナノ結晶の磁性と電子状態;　2019/11
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• hcp NiCo合金ナノ結晶の磁性と電子状態;　2019/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CoドープZnOナノ結晶における磁性と電子状態の相関;　2019/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• 準安定相hcp NiCo合金の磁性と電子状態;　2019/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CoドープZnOナノ結晶の磁性と電子状態;　2019/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• TiドープV2O3における常磁性絶縁体相;　2018/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• TiおよびCrドープV2O3ナノ結晶の光電子分光;　2018/08
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CoドープZnOナノ粒子凝集体の磁性と電子状態;　2017/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• NiSナノ結晶の金属絶縁体転移;　2017/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• 準安定相fcc CoCu合金ナノ粒子の磁性と電子状態;　2017/12
  ANNOUNCEMENT INFO.;　平成29年度応用物理学会九州支部学術講演会
  AUTHOR;　
  
• V2O3ナノ結晶の金属絶縁体転移におけるTiおよびCrドーピング効果;　2017/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CoドープZnOナノ粒子の磁性と電子状態;　2017/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• NiSナノ結晶の金属絶縁体転移;　2017/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• 準安定相fcc CoCu合金ナノ粒子の磁性;　2017/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• V2O3ナノ結晶の金属絶縁体転移におけるTiドーピング効果;　2017/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CoドープZnOナノ粒子とノンドープZnOナノ粒子の混合体の磁性;　2016/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• NiSナノ結晶の金属絶縁体転移;　2016/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• Fe3O4ナノ結晶の不純物誘起金属絶縁体転移;　2016/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• ノンドープおよび磁性イオンドープTiO2ナノ粒子の軟X発光分光;　2015/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• ノンドープ、Coドープ、VドープTiO2ナノ粒子の軟X線発光分光;　2015/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• hcp NiCoの磁性と電子状態;　2015/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• Electronic Structure and Magnetism of hcp NiCo Alloy;　2015/03
  ANNOUNCEMENT INFO.;　HAXPES 2015
  AUTHOR;　Yoichi Ishiwata, Kenta Akashi, Hirofumi Ishii, Yen-Fa Liao, Yu-Han Wu, Ku-Ding Tsuei, Yuki Utsumi, Stefano Agrestini, Yuji Inagaki, Tatsuya Kawae, Tetsuya Kida, Masashi Nantoh, and Koji Ishibashi
  
• hcp NiCo 合金の常磁性強磁性転移と電子状態;　2015/02
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• V2O3ナノ結晶の不純物誘起金属絶縁体転移;　2015/01
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• hcp NiCo合金の組成比変化に対する常磁性強磁性転移;　2015/01
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• Magnetism and electronic structure of non-doped and V-doped TiO2 nanoparticles;　2014/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CrドープV2O3ナノ結晶の金属絶縁体転移とその前駆現象;　2014/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• V2O3ナノ結晶におけるCrドープ量依存性;　2014/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• hcp-Niの硬Ｘ線光電子分光;　2014/01
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• Coドープルチル型TiO2における強磁性Coイオン;　2013/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CoドープTiO2粉末の軟X線吸収・発光分光;　2013/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• Fe3O4ナノ結晶の光電子分光;　2012/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• Fe3O4ナノ結晶の金属絶縁体転移;　2012/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• Metal-insulator transition in V2O3 nanocrystals;　2012/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　石渡洋一, 白石達也^M, 糸山真央^B, 今村真幸, 高橋和敏, 鎌田雅夫, 木田徹也, 石井啓文, 手塚泰久,南任真史, 石橋幸治
  
• Metal-insulator transition in Fe3O4 nanocrystals;　2012/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　大久保文生^M, 伊藤直樹^M, 石渡洋一, 今村真幸, 高橋和敏, 鎌田雅夫, 木田徹也, 石井啓文, 手塚泰久, 南任真史, 石橋幸治
  
• V2O3ナノ結晶とFe3O4ナノ結晶の金属絶縁体転移;　2012/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• TiドープV2O3ナノ結晶の金属絶縁体転移;　2012/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　石渡洋一, 白石達也^M, 糸山真央^B, 今村真幸, 高橋和敏, 鎌田雅夫, 木田徹也, 石井啓文, 手塚泰久, 稲垣祐次, 河江達也, 南任真史, 石橋幸治
  
• Fe3O4ナノ粒子の金属絶縁体転移;　2012/01
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• V2O3ナノ結晶の金属絶縁体転移;　2011/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CrドープV2O3ナノ粒子の金属絶縁体転移;　2011/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• (V0.99Cr0.01)2O3ナノ粒子の金属絶縁体転移;　2011/07
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• V2O3ナノ粒子における金属絶縁体転移の消失;　2011/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• 溶液合成したV2O3ナノ粒子の構造, 電子状態と磁性;　2010/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• CrドープしたV2O3ナノ粒子における金属絶縁体転移;　2010/11
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• Fe3-deltaO4ナノ粒子のポストアニール効果;　2010/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• VO2ナノ粒子の構造、電子状態と磁性;　2010/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• 酸化バナジウムナノ粒子の軟X線吸収・発光分光;　2010/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• 液相合成したV2O3ナノ粒子の軟X線吸収・発光分光;　2010/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• VO2ナノ粒子の金属絶縁体転移;　2009/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• V2O3ナノ粒子の軟X線吸収・発光分光;　2009/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• 酸化バナジウムにおける一次相転移のナノサイズ効果;　2007/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• Mn-Zn-O系における強磁性Mn状態;　2007/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• V2O3ナノ粒子の磁性と電気伝導;　2007/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• ブレークダウン法による伝導性酸化物ナノ粒子の作製;　2007/03
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• V2O3ナノ粒子の金属絶縁体転移;　2006/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• ブレークダウン法による磁性ナノ粒子の作製;　2006/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  

Invited Lecture, Special Lecture

• V2O3ナノ結晶の不純物誘起金属絶縁体転移;　2016/12
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• 放射光を用いた遷移金属酸化物ナノ材料の電子構造解析;　2013/09
  ANNOUNCEMENT INFO.;　
  AUTHOR;　
  
• カーボンナノチューブ/強磁性金属接合における巨大磁気抵抗効果;　2005/06
  ANNOUNCEMENT INFO.;　
  AUTHOR;