Faculty Profiles - ONOUE Masahira

写真a

ONOUE Masahira

Organization

Research Field in Cooperation, Integrated Arts and Sciences Area Center for Advanced Science Research and Promotion Research Support Unit xxx Lecturer

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Research Profiles

【研究シーズ集】鉄基機能材料の磁気特性及び化学結合状態の解明

Research History

2025.4 Kagoshima University Lecturer

Papers

八田匠音, 樗木直也, 尾上昌平, 赤木功 . 13 メスバウアー分光法による遊離酸化鉄キャラクタリゼーションのための予備的検討 ―合成フェリハイドライトのゲータイトへの変化過程の観察―（九州支部講演会） . 日本土壌肥料学会講演要旨集71 ( 0 ) 289 - 289 2025.9

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Language：Japanese Publisher：一般社団法人日本土壌肥料学会

DOI： 10.20710/dohikouen.71.0_289_1

CiNii Research
Sueyoshi Yukinari, Kobayashi Ryota, Onoue Masahira, Mitsui Yoshifuru, Umetsu Rie Y., Koyama Keiichi . Structural and Magnetic Properties of MnCo1−xFexGe1−ySiy (x, y = 0, 0.5) . MATERIALS TRANSACTIONSadvpub ( 0 ) 758 - 763 2025

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Language：English Publisher：The Japan Institute of Metals and Materials

Magnetic and structural properties of MnCo1−xFexGe1−ySiy (x, y = 0, 0.5) were investigated using X-ray powder diffraction and magnetization measurements in the temperature (T) range from 5 to 370 K and in magnetic fields up to μ0H = 5 T. At room temperature, MnCoGe and MnCoGe0.5Si0.5 were the orthorhombic crystal structure (M-phase), MnCo0.5Fe0.5Ge was the hexagonal crystal structure (P-phase), and MnCo0.5Fe0.5Ge0.5Si0.5 had two-phase coexistence of the M- and P-phases. MnCoGe and MnCo0.5Fe0.5Ge were a simple ferromagnetic and their Curie temperatures (TC) were determined to be 340 K and 200 K, respectively. MnCoGe0.5Si0.5 and MnCo0.5Fe0.5Ge0.5Si0.5 in μ0H ≤ 1 T showed a gentle dip in thermomagnetic curves at 10 ≤ T ≤ 100 K below TC which disappears when a magnetic field of μ0H > 3 T was applied. The magnetization curves of MnCoGe0.5Si0.5 and MnCo0.5Fe0.5Ge0.5Si0.5 at 5 K exhibited that a metamagnetic transition with the magnetic hysteresis in 0 < μ0H < 3 T. Our results suggest that substituting Fe for Co in MnCoGe system weakens the ferromagnetic interaction, whereas substituting Si for Ge strengthens the antiferromagnetic interaction.

DOI： 10.2320/matertrans.mt-mbw2024001

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Masahiko Hiroi, Tsubasa Takamoto, Iduru Shigeta, Masahira Onoue . Mössbauer study of magnetically ordered states in Heusler compounds Fe3-xMnxSi . Interactions245 ( 1 ) 2024.12Reviewed

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： 10.1007/s10751-024-01903-3

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Masahira Onoue, Yoshifuru Mitsui, Ryota Kobayashi, Rie Y. Umetsu, Yoshiya Uwatoko, Keiichi Koyama . Magnetic field effect on decomposition of Sm<inf>2</inf>Fe<inf>17</inf>N<inf>3</inf> probed using 57Fe Mössbauer spectroscopy . Interactions245 ( 1 ) 2024.12Reviewed

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： 10.1007/s10751-024-01942-w

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Yoshifuru Mitsui, Kohei Baba, Ryota Kobayashi, Masahira Onoue, Wataru Ito, Shunsuke Kuzuhara, Keiichi Koyama . High magnetic field effects on the phase separation behaviour of Fe-15mass%Cu alloys probed by 57Fe Mössbauer spectroscopy . Interactions245 ( 1 ) 2024.12Reviewed

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

DOI： 10.1007/s10751-024-01939-5

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Other Link： https://link.springer.com/article/10.1007/s10751-024-01939-5/fulltext.html
Keiichi Koyama, Yoshifuru Mitsui, Saki Imatsuji, Akari Onaka, Ryota Kobayashi, Masahira Onoue, Reisho Onodera . Study of heat treatment effect on magnetic properties of MnFeGe using 57Fe Mössbauer spectroscopy . Interactions245 ( 1 ) 2024.12Reviewed

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： 10.1007/s10751-024-01951-9

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Masahiko Hiroi, Kouki Akaishi, Tomohito Nonoyama, Iduru Shigeta, Masahira Onoue . Mössbauer Spectroscopy of Magnetic Ordered Phases in Heusler Compounds Fe3−xMnxSi . Proceedings of the 29th International Conference on Low Temperature Physics (LT29) 2023.5Reviewed

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Publishing type：Research paper (international conference proceedings) Publisher：Journal of the Physical Society of Japan

DOI： 10.7566/jpscp.38.011136

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Yoshifuru MITSUI, Hideto TANAKA, Masahira ONOUE, Moriharu NAGANO, Ryota KOBAYASHI, Rie Y. UMETSU, Keiichi KOYAMA . Magnetic and Hyperfine Properties of FeZnSb . JPS Conference Proceedings38 011138 2023.5Reviewed

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Language：English Publishing type：Research paper (international conference proceedings)

DOI： 10.7566/JPSCP.38.011138

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Masahira ONOUE, Yoshifuru MITSUI, Saki IMATSUJI, Ryota KOBAYASHI, Reisho ONODERA, Keiichi KOYAMA . Magnetic Properties of MnFeGe Probed Using 57Fe Mössbauer-spectroscopy . 38 - 011139 2023.5Reviewed

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Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

DOI： 10.7566/JPSCP.38.011139

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Akari Onaka, Masahira Onoue, Reisho Onodera, Yoshifuru Mitsui, Keiichi Koyama . Magnetic and structural properties of Fe-substituted MnCoGe with Ni2In-type structure . Journal of Magnetism and Magnetic Materials563 170000 - 170000 2022.12Reviewed

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Elsevier BV

DOI： 10.1016/j.jmmm.2022.170000

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Junki Takahashi, Yoshifuru Mitsui, Masahira Onoue, Ryota Kobayashi, Keiichi Koyama . Nitridation kinetics of Sm<inf>2</inf>Fe<inf>17</inf> probed using Mössbauer spectroscopy . Journal of Magnetism and Magnetic Materials554 2022.7Reviewed

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.jmmm.2022.169295

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Mitsui Yoshifuru, Onoue Masahira, Kobayashi Ryota, Sato Kaori, Kuzuhara Shunsuke, Ito Wataru, Takahashi Kohki, Koyama Keiichi . High Magnetic Field Effects on Cu-precipitation Behavior of Fe-1mass%Cu at 773 K . ISIJ International62 ( 3 ) 413 - 417 2022.3

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Language：English Publishing type：Research paper (scientific journal) Publisher：The Iron and Steel Institute of Japan

Tramp elements in steel, such as Cu and Sn, cannot be removed by acid treatment. Since these elements condense by repeating recycling process, leading to deterioration of strength. Therefore, the methods for avoiding condensation or removing tramp elements are required. In this study, in-magnetic-field annealing process was focused on because magnetic field is effective for diffusion, phase transformation, phase diagram and precipitation. In-magnetic-field annealing of Fe-1mass%Cu at 773 K was performed in 5 and 10 T for investigating precipitation behavior of supersaturated Cu. From microstructural observation, precipitation of Cu-rich phase in Fe-matrix, and magnetic field effect on itself were not observed clearly. Increase of the hyperfine field was detected for the samples annealed at 5 T by Mössbauer spectroscopy, indicating the enhancement of the Cu-precipitation. On the contrary, hyperfine field for 10T-annealed sample was slightly smaller than that for 0 T. Therefore, in-field annealing effect on Cu-precipitation became unclear at 10 T. These magnetic field effects were discussed in the viewpoints of the change of Cu–Fe phase diagram and the atomic diffusion under magnetic field. Difference of the magnetic field effects on precipitation between 5 T and 10 T is explained by the competition between the enhancement of the driving force of the precipitation and suppression of the atomic diffusion. The obtained results indicated that there is optimized magnetic field intensity for controlling Cu-precipitation.

DOI： 10.2355/isijinternational.isijint-2021-404

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Koichi Sato, Yohei Kondo, Masakiyo Ohta, Qiu Xu, Atsushi Yabuuchi, Atsushi Kinomura, Masahira Onoue, Takashi Onitsuka, Masahiko Hatakeyama, Hirotomo Iwakiri, Daiji Kato, Yoshiyuki Watanabe, Hiroyasu Tanigawa . Change in the positron annihilation lifetime of vacancy clusters containing hydrogen atoms in electron-irradiated F82H . Materials Science Forum1024 MSF 71 - 78 2021Reviewed

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Language：Japanese Publishing type：Part of collection (book)

DOI： 10.4028/www.scientific.net/MSF.1024.71

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MISC

Fe-Cu合金の相分離に対する強磁場効果

三井好古, 馬場公平, 小林領太, 尾上昌平, 伊東航, 葛原俊介, 小山佳一

日本金属学会講演大会(Web) 172nd 2023

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Publishing type：Research paper, summary (national, other academic conference)

J-GLOBAL

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Presentations

Masahira Onoue, Yoshifuru Mitsui, Keiichi Koyama Eﬀect of magnetic field and oxygen pressure on the decomposition of Sm2Fe17N3 International conference

8th International Conference on Advanced Electromaterials 2025.11

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Event date： 2025.11

Language：English Presentation type：Poster presentation

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尾上昌平琵琶湖をめぐる安全サイクル－放射線管理の 365 日－ (2)放射線業務従事者を送り出す事業所の 365 日 Invited

令和7年度放射線安全取扱部会年次大会（第66回放射線管理研修会） 2025.10

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Event date： 2025.10

Language：Japanese Presentation type：Symposium, workshop panel (nominated)

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八田匠音, 樗木直也, 尾上昌平, 赤木功メスバウアー分光法による遊離酸化鉄キャラクタリゼーションのための予備的検討 ―合成フェリハイドライトのゲータイトへの変化過程の観察―（九州支部講演会）

日本土壌肥料学会講演要旨集 2025.9 一般社団法人日本土壌肥料学会

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Event date： 2025.9

Language：Japanese

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Masahira Onoue, Kohei Noguchi, Yoshifuru Mitsui, Ryota Kobayashi, Masahiko Hiroi, Rie Y. Umetsu, Jun Gouchi, Yoshiya Uwatoko, Keiichi Koyama Quasi first-order magnetic transition of Mn1.9Fe0.1Sb0.9Sn0.1 probed using Mössbauer spectroscopy International conference

The 11th Pacific Rim International Conference on Advanced Materials and Processing 2023.11

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Event date： 2023.11

Language：English Presentation type：Poster presentation

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Masahira Onoue, Ryota Kobayashi, Yoshifuru Mitsui, Rie Y. Umetsu, Yoshiya Uwatoko, Keiichi Koyama Magnetic field effect on decomposition of Sm2Fe17N3 probed using 57Fe Mössbauer spectroscopy International conference

International Conference on Hyperfine Interactions and their Applications (HYPERFINE2023) 2023.11

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Event date： 2023.11

Language：English Presentation type：Poster presentation

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牧大介, 尾上昌平「準備完了!? 信頼性確保に向けた予防規程変更と機器の点検・校正」 (2)保健物理学会専門研究会報告書の紹介・放射線管理現場での対応例 Invited

令和 5年度放射線安全取扱部会年次大会（第 64 回放射線管理研修会） 2023.10

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Event date： 2023.10

Language：Japanese Presentation type：Symposium, workshop panel (nominated)

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Masahira Onoue, Yoshifuru Mitsui, Saki Imatsuji, Ryota Kobayashi, Akari Onaka, Reisho Onodera, Keiichi Koyama Magnetic properties of MnFeGe probed using 57Fe Mössbauer spectroscopy International conference

29th International Conference on Low Temperature Physics 2022.8

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Event date： 2022.8

Language：English Presentation type：Poster presentation

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尾上昌平新型コロナウイルス感染症への放射線施設での対応

日本放射線安全管理学会誌 2021.6 (一社)日本放射線安全管理学会

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Language：Japanese
尾上昌平新型コロナウイルス感染症への放射線施設での対応

日本放射線安全管理学会誌 2021.6 (一社)日本放射線安全管理学会

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Language：Japanese Presentation type：Symposium, workshop panel (nominated)

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Research Projects

Fe-57メスバウア分光測定による鉄置換3d遷移金属化合物の機能性発現機構の解明

Grant number：23K04421 2023.4 - 2026.3

日本学術振興会科学研究費助成事業基盤研究(C) 基盤研究(C)

尾上昌平

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Authorship：Principal investigator Grant type：Competitive

Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）

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