Rchr
J-GLOBAL ID:201801005292404948   Update date: Sep. 18, 2021

Koyama Keiichi

コヤマ ケイイチ | Koyama Keiichi
Affiliation and department:
Job title: 教授
Homepage URL  (1): http://www.sci.kagoshima-u.ac.jp/koyama
Research field  (1): Metallic materials
Research keywords  (5): 高圧 ,  物性 ,  磁性 ,  磁性材料 ,  強磁場
Research theme for competitive and other funds  (29):
  • 2021 - 2024 強磁場中平衡状態図に基づいた元素磁気分離法への挑戦
  • 2017 - 2021 低対称機能性物質の探索と機能特性の評価
  • 2016 - 2020 The study on equilibrium phase diagram under magnetic fields and preparation of ferromagnetic materials by magnetic field-induced reaction effects
  • 2016 - 2019 Magnetic field induced ferromagnetic stable phase including low melting point metal
  • 2017 - 2019 強磁場中状態図と磁場反応促進効果を利用した鉄系強磁性合金の創出
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Papers (338):
  • Masahiko Hiroi, Sora Nishiinoue, Iduru Shigeta, Masakazu Ito, Keiichi Koyama, Akihiro Kondo, Koichi Kindo, Isao Watanabe, Muneaki Fujii, Shojiro Kimura, et al. High magnetic field properties in Ru2-xFexCrSi with antiferromagnetic and spin-glass states. Physical Review B. 2021. 103. 9
  • Shun Nakagawa, Yoshifuru Mitsui, Ryota Kobayashi, Rie Y. Umetsu, Kohki Takahashi, Keiichi Koyama. Magnetic-field-induced decomposition in Cu2MnAl Heusler alloys. Journal of Magnetism and Magnetic Materials. 2021. 540. 168411-168411
  • Yumi Watanabe, Ryota Kobayashi, Yoshifuru Mitsui, Rie Y. Umetsu, Keiichi Koyama. Magnetic-field-induced selective retardation of reaction in Mn/Ga diffusion couple. Journal of Alloys and Compounds. 2021. 887. 161310-161310
  • Ryota Kobayashi, Akio Takaki, Yoshifuru Mitsui, Rie Y. Umetsu, Kohki Takahashi, Masaki Mizuguchi, Keiichi Koyama. Dual acceleration of ε-τ transformation in Mn-Al induced by Zn-addition and in-magnetic-field annealing. Materials Transactions. 2021. 62. 1. 124-129
  • Ryota Kobayashi, Yoshifuru Mitsui, Rie Y. Umetsu, Masaki Mizuguchi, Keiichi Koyama. Synthesis of Ferromagnetic τ-Mn-Al-C by Reactive Sintering. Materials Transactions. 2021. 62. 1. 130-134
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MISC (60):
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Patents (9):
Lectures and oral presentations  (9):
  • Magnetic field effects on nitridation of Sm2Fe17
    (Joint 5th Int’l Symposium on Frontiers in Materials Science and 3rd Int’l Symposium on Nano-materials, Technology and Applications 2019)
  • Magnetic Field-Induced Synthesis of Mn-Based Ferromagnetic Alloys
    (International Conference Frontiers in Materials Science 2017 2017)
  • Magnetic field-induced synthesis of ferromagnetic phase
    (18th International Conference on Crystal Growth and Epitaxy 2016)
  • Development of new in-field analytical system and synthesis of ferromagnetic materials under high magnetic field
    (2014)
  • Magnetic Field Effect on the Equilibrium Diagram of Bi-Mn Binary System
    (10th International Conference of Computational Methods in Sciences and Engineering 2014)
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Education (1):
  • 1994 - 1997 Hiroshima University
Professional career (1):
  • 博士(学術) (広島大学)
Work history (10):
  • 2020/04 - 現在 Kagoshima University
  • 2017/04 - 現在 Kagoshima University
  • 2010/01 - 現在 Kagoshima University
  • 2019/04 - 2020/03 Kagoshima University
  • 2017/04 - 2019/03 Kagoshima University
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Committee career (6):
  • 2019 - 現在 日本磁気科学会 理事(中四国九州支部会長)
  • 2018 - 2018 独立行政法人日本学術振興会 科学研究費助成事業審査 意見書作成者
  • 2014 - 2016 独立行政法人大学入試センター 教科科目第一委員会 委員
  • 2014 - 2016 東京大学物性研究所 共同利用施設委員会 委員
  • 2013 - 2016 強磁場フォーラム 幹事
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Awards (4):
  • 2021/03 - 株式会社リバネス AQI賞 磁場と発酵制御技術による機能強化食品の生産技術開発
  • 2017/11 - 日本磁気科学会 優秀学術賞 磁場による強磁性物質の機能性と平衡状態図の制御に関する研究
  • 2003/10 - 金属研究助成会 会原田研究奨励賞 強磁場・極低温・高感度電子スピン・サイクロトロン共鳴装置による希土類金属間化合物の研究
  • 1998/10 - 日本応用磁気学会 学術奨励賞(武井賞) 窒素侵入型化合物Nd2Fe17N3単結晶の磁気異方性
Association Membership(s) (4):
日本磁気科学会 ,  日本物理学会 ,  日本鉄鋼協会 ,  日本金属学会
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