The study on equilibrium phase diagram under magnetic fields and preparation of ferromagnetic materials by magnetic field-induced reaction effects

• Project/Area Number: 16H04547
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Metal making/Resorce production engineering
• Research Institution: Kagoshima University
• Principal Investigator: KOYAMA Keiichi 鹿児島大学, 理工学域理学系, 教授 (70302205)
• Co-Investigator(Kenkyū-buntansha): 三井 好古 鹿児島大学, 理工学域理学系, 准教授 (90649782) ; 伊藤 昌和 鹿児島大学, 総合科学域総合教育学系, 准教授 (40294524)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000); Fiscal Year 2019: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2016: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
• Keywords: 強磁場 / 平衡状態図 / 磁場中合成 / 強磁性体 / 磁場効果 / 状態図 / 金属物性 / 結晶成長 / 磁性 / 反応・分離工学

Outline of Final Research Achievements

We evaluated equilibrium phase diagrams in high magnetic fields and obtained the following main results regarding the magnetic filed-induced chemical reaction effect (MFE). (1) We have developed a heat treatment quenching furnace in a magnetic fields up to 19T (the world's highest magnetic field). (2) The origin of the MFE for MnBi is mainly due to the enhancement of the MnBi-phase formation rate. (3) It was suggested that magnetic separation of MnBi is possible even at about 0.5 T by using the magnetic field gradient. (4) The origin of the field-induced nonmagnetic-ferromagnetic phase transformation in MnAl is due to the promotion of the nonmagnetic epsilon phase-ferromagnetic tau phase transformation and the suppression of the nonmagnetic beta phase transformation. (5) We found that the epsilon phase was stabilized by C in MnAl. (6) An efficient tau phase magnetic field synthesis method was developed using MnAlZn. (7) Field suppressing effect of crystal size was found with MnCuAl.

Academic Significance and Societal Importance of the Research Achievements

本研究で、機能性磁性材料５種類の磁場効果を解明し、３件の磁場効果の起源を突き止めた。世界最高磁場中強磁性物質合成に成功した。磁場中平衡状態図の計算法の開発が進み、効率的に磁場中材料開発が可能になった。助成期間に９編の査読付き論文発表、3度の国際会議招待講演成果公表、４件の関連特許出願、2017年1月には南日本新聞誌上で研究成果が報道発表されるなど、本研究の学術的意義と社会的意義は高いことを示した。

Research Products

• [Journal Article] Magnetic-Field-Induced Enhancement of Phase Transformation in Ferromagnetic τ-Mn-Al (2019)
  • Author(s): 小林 領太, 三井 好古, 梅津 理恵, 高橋 弘紀, 水口 将輝, 小山 佳一
  • Journal Title: Journal of the Japan Institute of Metals and Materials Volume: 83 Issue: 6 Pages: 181-185
  • DOI: 10.2320/jinstmet.J2018057
  • NAID: 130007653135
  • ISSN: 0021-4876, 1880-6880, 2433-7501
  • Year and Date: 2019-06-01
  • Peer Reviewed / Open Access
• [Journal Article] Different Magnetic Field Effects on the β-τ Phase Transformation Between (Mn, Zn)-Al and Mn-Al-C (2019)
  • Author(s): Y. Mitsui, R. Kobayashi, Y. Takanaga, A. Takaki, R.Y Umetsu, K. Takahashi, M. Mizuguchi, K. Koyama
  • Journal Title: IEEE Trans. on Magn. Volume: 55 Issue: 2 Pages: 1-4
  • DOI: 10.1109/tmag.2018.2860559
  • Peer Reviewed
• [Journal Article] -field annealing and quenching for ferromagnetic MnBi under 19 T (2019)
  • Author(s): R. Kobayashi, Y. Mitsui, K. Takahashi, S. Uda, K. Koyama
  • Journal Title: IEEE Trans. on Magn. Volume: 55 Issue: 2 Pages: 1-4
  • DOI: 10.1109/tmag.2018.2872105
  • Peer Reviewed
• [Journal Article] Reactive sintering process of ferromagnetic MnBi under high magnetic fields (2018)
  • Author(s): Y. Mitsui, R.Y Umetsu, K. Takahashi, K. Koyama
  • Journal Title: J. Magn. Magn. Mater. Volume: 453 Pages: 231-235
  • DOI: 10.1016/j.jmmm.2018.01.026
  • Peer Reviewed
• [Journal Article] Magnetic-Field-Induced Acceleration of Phase Formation in τ-Mn-Al (2017)
  • Author(s): Kobayashi Ryota、Mitsui Yoshifuru、Umetsu Rie Y.、Takahashi Kohki、Mizuguchi Masaki、Koyama Keiichi
  • Journal Title: Mater. Trans. Volume: 58 Pages: 1511-1518
  • NAID: 130006179819
  • Peer Reviewed
• [Journal Article] 15T級強磁場中小型急冷炉の開発 (2017)
  • Author(s): 小山 佳一、山下 美咲、小林 領太、三井 好古、高橋 弘紀、宇田 聡
  • Journal Title: 鹿児島大学理学部紀要 Volume: 50 Pages: 1-5
  • NAID: 120006425826
  • Open Access
• [Journal Article] 強磁場中固相焼結で合成したMnBiの特性評価 (2017)
  • Author(s): 小山 佳一、平 敦志、三井 好古、高橋 弘紀
  • Journal Title: 鹿児島大学理学部紀要 Volume: 50 Pages: 6-11
  • NAID: 120006425827
  • Open Access
• [Journal Article] Annealing temperature and magnetic field effects for ε－τ transformation in Mn-Al alloys (2017)
  • Author(s): R. Kobayashi, Y. Mitsui, R.Y. Umetsu, K. Takahashi, M. Mizuguchi, K. Koyama
  • Journal Title: IEEE Magn. Lett. Volume: 8 Pages: 1400704-1400704
  • DOI: 10.1109/lmag.2016.2617859
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Development of a compact quenching furnace used under high magnetic fields (2017)
  • Author(s): M. Yamashita, K. Abematsu, K. Takahashi, Y. Mitsui, K. Koyama
  • Journal Title: IEEE Magn. Lett. Volume: 8 Pages: 6501504-6501504
  • DOI: 10.1109/lmag.2016.2621733
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Enhancement of the Phase Formation Rate during In-Field Solid-Phase Reactive Sintering of Mn-Bi (2017)
  • Author(s): D. Miyazaki, Y. Mitsui, R. Y. Umetsu, K. Takahashi, S. Uda, K. Koyama
  • Journal Title: MATERIALS TRANSACTIONS Volume: 58 Issue: 5 Pages: 720-723
  • DOI: 10.2320/matertrans.MBW201609
  • NAID: 130005611923
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Cu-Mn-Al 合金の磁場中熱処理 (2019)
  • Author(s): 中川 駿、小林領太、三井好古、小山佳一、梅津理恵、高橋弘紀
  • Organizer: 日本金属学会九州支部令和元年度合同学術講演大会
• [Presentation] 強磁性 Mn-Al の相平衡に対する磁場効果 (2019)
  • Author(s): 小林領太、三井好古、及川勝成、小野寺礼尚、梅津理恵、高橋弘紀、小山佳一
  • Organizer: 日本金属学会九州支部令和元年度合同学術講演大会
• [Presentation] Mn-Al 合金のε-相に対する C 添加効果 (2019)
  • Author(s): 小山 佳一、高永 悠大、小林 領太、三井 好古
  • Organizer: 日本金属学会2019年秋期講演大会
• [Presentation] (Mn,Zn)-Alに対する磁場中熱処理効果 (2019)
  • Author(s): 小林 領太、三井 好古、梅津 理恵、高橋 弘紀、水口 将輝、小山 佳一
  • Organizer: 日本金属学会2019年秋期講演大会
• [Presentation] 強磁場中示差熱分析によるM n - A l 基合金のε－τ変態の速度論的 (2019)
  • Author(s): 三井 好古、麓 秀斗、小林 領太、高橋 弘紀、小山 佳一
  • Organizer: 日本金属学会2019年秋期講演大会
• [Presentation] The effects of substituted elements on the spin reorientation in Mn2-xFexSb1-ySny (2019)
  • Author(s): Kohei Noguchi, Yoshifuru Mitsui, Masahiko Hiroi, Rie Umetsu, Jun Gouchi, Yoshiya Uwatoko and Keiichi Koyama
  • Organizer: Joint 5th Int’l Symposium on Frontiers in Materials Science and 3rd Int’l Symposium on Nano-materials, Technology and Applications
  • Int'l Joint Research
• [Presentation] Magnetic effect on phase growth of Mn/Ga diffusion couple (2019)
  • Author(s): Yumi Watanabe, Ryota Kobayashi, Yoshifuru Mitsui, and Keiichi Koyama
  • Organizer: Joint 5th Int’l Symposium on Frontiers in Materials Science and 3rd Int’l Symposium on Nano-materials, Technology and Applications
  • Int'l Joint Research
• [Presentation] Magnetic properties of Cu-Mn-Al system annealed under high magnetic fields (2019)
  • Author(s): Shun Nakagawa, Y. Mitsui, Ryota Kobayashi, Rie Y. Umetsu, Kohki Takahashi, and Keiichi Koyama
  • Organizer: Joint 5th Int’l Symposium on Frontiers in Materials Science and 3rd Int’l Symposium on Nano-materials, Technology and Applications
  • Int'l Joint Research
• [Presentation] Magnetic field effect on phase stability of L10-MnAl (2019)
  • Author(s): Ryota Kobayashi, Yoshifuru Mitsui, Katsunari Oikawa, Reisho Onodera, Rie Umetsu, Kohki Takahashi and Keiichi Koyama
  • Organizer: Joint 5th Int’l Symposium on Frontiers in Materials Science and 3rd Int’l Symposium on Nano-materials, Technology and Applications
  • Int'l Joint Research
• [Presentation] Magnetic field effects on nitridation of Sm2Fe17 (2019)
  • Author(s): Keiichi Koyama
  • Organizer: Joint 5th Int’l Symposium on Frontiers in Materials Science and 3rd Int’l Symposium on Nano-materials, Technology and Applications
  • Int'l Joint Research / Invited
• [Presentation] hcp-MnAlの相安定性に対するC添加効果 (2019)
  • Author(s): 三井好古、高永悠大、小林領太、小山佳一
  • Organizer: 2019年第66回応用物理学会春期学術講演会
• [Presentation] τ相の相安定に対する磁場効果 (2019)
  • Author(s): 小林領太、三井好古、及川勝成、小野寺礼尚、高橋弘紀、小山佳一
  • Organizer: 2019年第66回応用物理学会春期学術講演会
• [Presentation] 強磁場下におけるMn-Al平衡相の生成抑制 (2018)
  • Author(s): 小林領太、高木観雄、三井好古、梅津理恵、水口将輝、小山佳一
  • Organizer: 平成30年度日本金属学会九州支部合同学術講演会
• [Presentation] Microstructures of MnBi obtained by quenching in magnetic fields up to19 T (2018)
  • Author(s): R. Kobayashi, M. Yamashita, D. Miyazaki, Y. Mitsui, K. Takahashi, S. Uda and K. Koyama
  • Organizer: International Conference on Magnetism
• [Presentation] n-field Annealing Effects on L10-(Mn,Zn)-Al and Mn-Al-C (2018)
  • Author(s): Y. Mitsui, R. Kobayashi, A. Takaki, Y. Takanaga, R.Y. Umetsu, M. Mizuguchi, K. Takahashi and K. Koyama
  • Organizer: International Conference on Magnetism
• [Presentation] 強磁場中熱処理した(Mn,Zn)-Alの磁気特性 (2018)
  • Author(s): 三井好古、小林領太、高木観雄、梅津理恵、高橋弘紀、水口将輝、小山佳一
  • Organizer: 2018年第79回応用物理学会秋季学術講演会
• [Presentation] Magnetic field effect on the phase transformation and phase stability of L10-MnAl (2018)
  • Author(s): Ryota Kobayashi, Shuto Fumoto, Yoshifuru Mitsui, Rie Umetsu, Kohki Takahashi, Katsunari Oikawa, Keiichi Koyama
  • Organizer: The 3rd Asian Applied Physics Conference
• [Presentation] 磁場中熱処理によるτ-MnAlの安定化 (2017)
  • Author(s): 小林領太, 三井好古, 梅津理恵, 高橋弘紀, 水口将輝, 高梨弘毅, 小山佳一
  • Organizer: 日本金属学会
  • Place of Presentation: 首都大学東京、東京都、八王子市
  • Year and Date: 2017-03-15
• [Presentation] In-field annealing effects on as-melted Mn-Al (2017)
  • Author(s): R. Kobayashi, Y. Mitsui, R.Y. Umetsu, K. Takahashi, M. Mizuguchi, K. Koyama
  • Organizer: 応用物理学会
  • Place of Presentation: パシフィコ横浜、神奈川県、横浜市
  • Year and Date: 2017-03-14
• [Presentation] 強磁場下における Mn-Al 平衡相の生成抑制 (2017)
  • Author(s): 小林領太、三井好古、小山佳一、梅津理恵、高橋弘紀、水口将輝
  • Organizer: 平成29年度日本金属学会九州支部合同学術講演会
• [Presentation] 反応焼結による Mn-Al-C の合成 (2017)
  • Author(s): 高木観雄、小林領太、三井好古、高橋弘紀、水口将輝、小山佳一
  • Organizer: 平成29年度日本金属学会九州支部合同学術講演会
• [Presentation] Quenching furnace used in high magnetic fields up to 19 T (2017)
  • Author(s): Y. MITSUI, R. KOBAYASHI, M. YAMASHITA, K. TAKAHASHI, K. KOYAMA, S. UDA
  • Organizer: International Conference on Magneto-Science, 2017 Reims
  • Int'l Joint Research
• [Presentation] Differential Thermal Analysis in Mn-Al Alloys under High Magnetic Fields (2017)
  • Author(s): S. Fumoto, R. Kobayashi, Y. Mitsui, M. Ito, K.Takahashi, K. Koyama
  • Organizer: International Conference on Magneto-Science, 2017 Reims
  • Int'l Joint Research
• [Presentation] Phase Transformation of as-cast Mn-Al in High Magnetic Field (2017)
  • Author(s): R. Kobayashi, Y. Mitsui, R. Y. Umetsu, K. Takahashi, M. Mizuguchi, K. Koyama
  • Organizer: International Conference on Magneto-Science, 2017 Reims
  • Int'l Joint Research
• [Presentation] In-field annealing effects on (Mn,Zn)-Al (2017)
  • Author(s): A. Takaki, R. Kobayashi, Y. Mitsui, R. Y. Umetsu, K. Takahashi, M. Mizuguchi, K. Koyama
  • Organizer: International Conference on Magneto-Science, 2017 Reims
  • Int'l Joint Research
• [Presentation] In-field annealing effects on MnxAl100-xC2 (2017)
  • Author(s): Y. Takanaga, Y. Mitsui, M. Hiroi, R. Kobayashi, K. Takahashi, K. Koyama
  • Organizer: International Conference on Magneto-Science, 2017 Reims
  • Int'l Joint Research
• [Presentation] 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 (2017)
  • Author(s): 小山佳一
  • Organizer: 日本磁気科学会
• [Presentation] 反応初期におけるMnBiの磁場効果 (2017)
  • Author(s): 三井好古、宮﨑泰樹、小山佳一、梅津理恵、高橋弘紀、宇田聡
  • Organizer: 日本磁気科学会
• [Presentation] Mn-Biに対する磁場中急冷 (2017)
  • Author(s): 小林領太、山下美咲、三井好古、高橋弘紀、宇田聡、小山佳一
  • Organizer: 日本磁気科学会
• [Presentation] Magnetic Field-Induced Synthesis of Mn-Based Ferromagnetic Alloys (2017)
  • Author(s): K. Koyama, R. Kobayashi, Y. Mitsui
  • Organizer: Frontiers in Materials Science, 2017 Greifswald
  • Int'l Joint Research / Invited
• [Presentation] MnBi形態の磁場効果 (2016)
  • Author(s): 高木観雄, 三井好古, 宮﨑泰樹, 梅津理恵, 高橋弘紀, 小山佳一
  • Organizer: 日本磁気科学会
  • Place of Presentation: 物質材料研究機構、茨城県、つくば市
  • Year and Date: 2016-11-15
• [Presentation] Magnetic Field-Induced Synthesis of Ferromagnetic Phase (2016)
  • Author(s): K. Koyama, Y. Mitsui
  • Organizer: the 18th International Conference on Crystal Growth and Epitaxy (ICCGE-18)
  • Place of Presentation: 名古屋国際会議場、愛知県、名古屋市
  • Year and Date: 2016-08-07
  • Int'l Joint Research / Invited
• [Presentation] Magnetic Fields Effect on Phase Formation of MnBi Synthesized by Reactive Sintering (2016)
  • Author(s): D. Miyazaki, Y. Mitsui, K. Takahashi, S. Uda, K. Koyama
  • Organizer: The 4th International Conference of Asian Union of Magnetics Societies (IcAUMS 2016)
  • Place of Presentation: 台南市、台湾
  • Year and Date: 2016-08-01
  • Int'l Joint Research
• [Presentation] Magnetic Field-Induced L10-Ferromagnetic MnAl (2016)
  • Author(s): R. Kobayashi, Y. Mitsui, R. Y. Umetsu, K. Takahashi, M. Mizuguchi, K. Koyama
  • Organizer: The 4th International Conference of Asian Union of Magnetics Societies (IcAUMS 2016)
  • Place of Presentation: 台南市、台湾
  • Year and Date: 2016-08-01
  • Int'l Joint Research
• [Presentation] Synthesis of Mn-Bi alloy using a quenching furnace under high magnetic fields (2016)
  • Author(s): M. Yamashita, K. Abematsu, K. Takahashi, Y. Mitsui, K. Koyama
  • Organizer: The 4th International Conference of Asian Union of Magnetics Societies (IcAUMS 2016)
  • Place of Presentation: 台南市、台湾
  • Year and Date: 2016-08-01
  • Int'l Joint Research
• [Presentation] Magnetic Field Effects on the Morphology of Bi-Mn System (2016)
  • Author(s): A.Takaki, Y.Mitsui, D. Miyazaki, R.Y. Umetsu, K. Takahashi, K. Koyama
  • Organizer: The 4th International Conference of Asian Union of Magnetics Societies (IcAUMS 2016)
  • Place of Presentation: 台南市、台湾
  • Year and Date: 2016-08-01
  • Int'l Joint Research
• [Presentation] Mn-Al-Cの相変化 (2016)
  • Author(s): 高永悠大, 小林領太, 三井好古, 廣井政彦, 高橋弘紀, 小山佳一
  • Organizer: 日本物理学会九州支部例会
  • Place of Presentation: 福岡大学、福岡県、福岡市
• [Remarks] 鹿児島大学大学院理工学研究科物理宇宙専攻 磁気物理学(小山・三井研究室)
  • URL: https://www.sci.kagoshima-u.ac.jp/koyama
• [Remarks] 鹿児島大学大学院理工学研究科物理・宇宙専攻 磁気物理学研究室ホームページ
  • URL: http://www.sci.kagoshima-u.ac.jp/koyama/
• [Remarks] 鹿児島大学大学院理工学研究科物理・宇宙専攻 磁気物理学（小山・三井研究室）
  • URL: http://www.sci.kagoshima-u.ac.jp/~koyama
• [Patent(Industrial Property Rights)] Cu-Mn-Al系磁石の製造方法 (2019)
  • Inventor(s): 三井好古、小山佳一、中川駿
  • Industrial Property Rights Holder: 三井好古、小山佳一、中川駿
  • Industrial Property Rights Type: 特許
  • Filing Date: 2019