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Local crystal structure and phase stability of rare earth-metal borides with boron dimensional network structure

Research Project

Project/Area Number 19K05643
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
Research InstitutionKyushu University (2020-2021)
Tohoku University (2019)

Principal Investigator

Yubuta Kunio  九州大学, 工学研究院, 学術研究員 (00302208)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords結晶構造解析 / 相安定性 / 局所構造 / 単結晶育成 / 電子回折トモグラフィー / 4D-STEM 観察 / 触媒特性 / 非化学量論性 / 次元性ネットワーク構造 / 局所結晶構造 / 構造変調
Outline of Research at the Start

本研究課題では、通常の原子価のみでは説明出来ない複雑な原子配列から構成されるホウ素次元性ネットワーク構造をもつ希土類-金属(主に遷移金属)-ホウ化物に現れる多様な構造変調に着目する。元素置換による局所的な原子配列のゆらぎ(構造不整、非整合変調構造、逆位相境界構造など)と、非化学量論性を伴う相安定性の相関について考察する。得られるホウ化物の相安定性についての知見をベースにして、相安定性と強い相関を持つ磁気・輸送・機械特性をコントロールするための結晶デザインの新しい指針を構築する。

Outline of Final Research Achievements

Various structural modulations appearing in rare earth-metal (mainly transition metal)-borides with boron dimensional network structures, which are strongly correlated with characteristic properties of interest to many researchers, are revealed. In particular, the local crystal structure provides important insights into the phase stability of rare earth-metal-borides with a characteristic boron dimensionality network structure.
Atomic resolution STEM observations led to 'atomic displacement analysis', providing insight into 'fluctuations of atomic arrangement' in borides. By combination with atomic-resolution elemental mapping using spectroscopy, the investigation of non-stoichiometry at the atomic arrangement level was advanced. Electron diffraction tomography has also revealed structural features of diffuse scattering.

Academic Significance and Societal Importance of the Research Achievements

ホウ素次元性ネットワーク構造をもつ希土類-金属-ホウ化物における構造ブロック・インテグレーションでは,複数の構造ブロックを組み合わせて新しい結晶構造を作り上げる.それぞれの構造ブロック固有(intra-)の特徴に加えて数種類の構造ブロック間(inter-)の相関にも秩序が見いだされ,新たな構造次元性を伴う相乗効果が生まれる.このような観点から,従来の材料開発のベースとなっている3次元結晶構造という基本概念に,構造ブロック・インテグレーションが与える余剰な構造次元性を与えることで,ホウ化物材料のもつ特性(磁性材料,熱電変換材料,触媒材料など)を新たなステージに引き上げることが可能になる.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (47 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (6 results) Journal Article (16 results) (of which Int'l Joint Research: 14 results,  Peer Reviewed: 15 results,  Open Access: 1 results) Presentation (25 results) (of which Int'l Joint Research: 8 results,  Invited: 3 results)

  • [Int'l Joint Research] University of Vienna/TU Wien(オーストリア)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Dalian University of Technology/Ningbo Inst. of Mater. Tech. and Eng./Shenzhen Polytechnic(中国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of California, Riverside(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Stockholm University(スウェーデン)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of Wienna(オーストリア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Jagiellonian University(ポーランド)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Redetermination of the crystal structures of rare-earth trirhodium diboride RERh3B2 (RE = Pr, Nd and Sm) from single-crystal X-ray data2022

    • Author(s)
      M. Tokuda, K. Yubuta, T. Shishido, K. Sugiyama
    • Journal Title

      Acta Cryst.

      Volume: E78 Issue: 1 Pages: 76-79

    • DOI

      10.1107/s2056989021013311

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nb6Mn1-xIr6+xB8 (x = 0.25): A ferrimagnetic boride containing planar B6 rings interacting with ferromagnetic Mn chains2021

    • Author(s)
      N. Sharma, Y. Zhang, M. Mbarki, J. Scheifers, K. Yubuta, S. Kimber, B.P.T. Fokwa
    • Journal Title

      J. Phys. Chem. C

      Volume: 125 Issue: 24 Pages: 13635-13640

    • DOI

      10.1021/acs.jpcc.1c02662

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electronic structure of a borophene layer in rare-earth aluminum/chromium boride and its hydrogenated derivative, borophane2021

    • Author(s)
      M. Niibe, M. Cameau, N. T. Cuong, O. I. Sunday, X. Zhang, Y. Tsujikawa, S. Okada, K. Yubuta, T. Kondo, I. Matsuda
    • Journal Title

      Phys. Rev. Mater.

      Volume: 5 Issue: 8 Pages: 084007-084007

    • DOI

      10.1103/physrevmaterials.5.084007

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 多元金属ホウ化物、ホウ炭化物の硬さおよび熱化学的安定性2021

    • Author(s)
      宍戸 統悦,野村 明子,菅原 孝昌,黒澤 俊介,湯葢 邦夫,神津 薫,岡田 繁,林 好一,手嶋 勝弥,大石 修治,森 孝雄,吉川 彰
    • Journal Title

      J. Flux Growth

      Volume: 15 Pages: 2-10

    • Related Report
      2021 Annual Research Report
  • [Journal Article] HPT production of large bulk skutterudites2021

    • Author(s)
      G. Rogl, S. Ghosh, O. Renk, K. Yubuta, A. Grytsiv, E. Schafler, M. Zehetbauer, R.C. Mallik, E. Bauer, P. Rogl
    • Journal Title

      J. Alloys Compd.

      Volume: 854 Pages: 156678-156678

    • DOI

      10.1016/j.jallcom.2020.156678

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Influence of shear strain on HPT-processed n-type skutterudites yielding ZT=2.12021

    • Author(s)
      G. Rogl, S. Ghosh, O. Renk, K. Yubuta, A. Grytsiv, E. Schafler, M. Zehetbauer, R.C. Mallik, E. Bauer, P. Rogl
    • Journal Title

      J. Alloys Compd.

      Volume: 855 Pages: 157409-157409

    • DOI

      10.1016/j.jallcom.2020.157409

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Topological Dirac nodal loops in nonsymmorphic hydrogenated monolayer boron2020

    • Author(s)
      N.T. Cuong, I. Tateishi, M. Cameau, M. Niibe, N. Umezawa, B. Slater, K. Yubuta, T. Kondo, M. Ogata, S. Okada, I. Matsuda,
    • Journal Title

      Phys. Rev. B

      Volume: 101 Issue: 19 Pages: 195412-195412

    • DOI

      10.1103/physrevb.101.195412

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] New synthesis route for complex borides; rapid synthesis of thermoelectric yttrium aluminoboride via liquid-phase2020

    • Author(s)
      H.-W. Son, D. Berthebaud, K. Yubuta, A. Yoshikawa, T. Shishido, K. Suzuta, T. Mori
    • Journal Title

      Sci. Rep.

      Volume: 10 Issue: 1 Pages: 89141-16

    • DOI

      10.1038/s41598-020-65818-z

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Optimization of the structure and soft magnetic properties of a Fe87B13 nanocrystalline alloy by additions of Cu and Nb2020

    • Author(s)
      L. Wu, Y. Li, K. Yubuta, A. He, Y. Zhang, W. Zhang
    • Journal Title

      J. Magn. Magn. Mater.

      Volume: 497 Pages: 166001-166001

    • DOI

      10.1016/j.jmmm.2019.166001

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Structure and properties of nanoporous FePt fabricated by dealloying a melt-spun Fe60Pt20B20 alloy and subsequent annealing2020

    • Author(s)
      D. Ma, Y. Wang, Y. Li, R.Y. Umetsu, S. Ou, K. Yubuta, W. Zhang
    • Journal Title

      J. Mater. Sci. Technol.

      Volume: 36 Pages: 128-133

    • DOI

      10.1016/j.jmst.2019.05.066

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nanostructured core-shell metal boride-oxides as highly efficient electrocatalysts for photoelectrochemical water oxidation2020

    • Author(s)
      C. Lu, P.R. Jothi, T. Thersleff, T.M. Budnyak, A. Rokicinska, K. Yubuta, R. Dronskowski, P. Kustrowski, B.P.T. Fokwa, A. Slabon
    • Journal Title

      Nanoscale

      Volume: 12 Issue: 5 Pages: 3121-3128

    • DOI

      10.1039/c9nr09818f

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nanostructure with diffuse streaks in ScRh3B0.6 compound studied by electron microscopy2020

    • Author(s)
      K. Yubuta, A. Nomura, K. Kouzu, T. Yamasaki, S. Okada, T. Mori, A. Yoshikawa, K. Sugiyama, T. Shishido
    • Journal Title

      Solid State Sci.

      Volume: 102 Pages: 106177-106177

    • DOI

      10.1016/j.solidstatesciences.2020.106177

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Syntheses and Properties of Yb(Al<sub>1−x</sub><i>T</i><sub>x</sub>)B<sub>4</sub> (<i>T</i> = Cr, Fe) Compounds2019

    • Author(s)
      K. Kouzu, T. Yamasaki, S. Okada, T. Mori, Q. Guo, K. Yubuta, A. Nomura, T. Shishido, A. Yoshikawa, P. Rogl,
    • Journal Title

      Journal of the Japan Society of Powder and Powder Metallurgy

      Volume: 66 Issue: 11 Pages: 525-529

    • DOI

      10.2497/jjspm.66.525

    • NAID

      130007745179

    • ISSN
      0532-8799, 1880-9014
    • Year and Date
      2019-11-15
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Abundant vanadium diboride with graphene-like boron layers for hydrogen evolution2019

    • Author(s)
      P.R. Jothi, Y. Zhang, K. Yubuta, D.B. Culver, M. Conley, B.P.T. Fokwa
    • Journal Title

      ACS Appl. Energy Mater.

      Volume: 2 Issue: 1 Pages: 176-181

    • DOI

      10.1021/acsaem.8b01615

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Crystal growth and some properties of Tm(Al1-xMox)B4 synthesized by Al-flux2019

    • Author(s)
      S. Okada, K. Kouzu, T. Yamasaki, T. Mori, Q. Guo, T. Shishido, K. Yubuta, G. Rogl, P. Rogl
    • Journal Title

      Solid State Phenom.

      Volume: 289 Pages: 65-70

    • DOI

      10.4028/www.scientific.net/ssp.289.65

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Crystal growth and physical properties of Lu(Al1-xTx)B4 (T = Fe, Cr) by Al-self flux2019

    • Author(s)
      K. Kouzu, T. Yamasaki, S. Okada, T. Mori, Q. Guo, T. Shishido, K. Yubuta, A. Nomura, A. Yoshikawa, P. Rogl
    • Journal Title

      Solid State Phenom.

      Volume: 289 Pages: 120-126

    • DOI

      10.4028/www.scientific.net/ssp.289.120

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 4D-STEM 法による ScRh3B0.75 合金の超格子ドメイン構造解析2022

    • Author(s)
      安原 聡,柴田 昌照,村山 晴佳,湯葢 邦夫,野村 明子,宍戸 統悦,杉山 和正
    • Organizer
      第14回 日本ホウ素・ホウ化物研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 溶融 Cu フラックス法で合成した RERh3B2 型類縁化合物の構造研究2022

    • Author(s)
      徳田誠,森秀太,湯葢邦夫,杉山和正,宍戸統悦
    • Organizer
      第14回 日本ホウ素・ホウ化物研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 金属フッ化物とホウ素から CaB6-タイプ化合物の合成と性質2022

    • Author(s)
      岡田 繁,神津 薫,萩原 健司,野村 明子,菅原 孝昌,宍戸 統悦, 吉川 彰,湯葢 邦夫,森 孝雄
    • Organizer
      第14回 日本ホウ素・ホウ化物研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] R(Al, T)B4 (R = 希土類,T = Mo, Mn)化合物の合成と性質2022

    • Author(s)
      神津 薫,岡田 繁,萩原 健司,野村 明子,菅原 孝昌,宍戸 統悦, 吉川 彰,湯葢 邦夫,森 孝雄
    • Organizer
      第14回 日本ホウ素・ホウ化物研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] R-M-B-(C) (R = rare earth, M = Rh, Co)系化合物の形成と相安定性2022

    • Author(s)
      野村 明子,宍戸 統悦,菅原 孝昌,黒澤 俊介,湯葢 邦夫,神津 薫,岡田 繁,森 孝雄,吉川 彰
    • Organizer
      第14回 日本ホウ素・ホウ化物研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 4D-STEM と STEM-HAADF を用いた ScRh3B0.75 合金の超構造解析2021

    • Author(s)
      安原 聡,柴田 昌照,阿井 晴佳,湯葢 邦夫,野村 明子,宍戸 統悦,杉山 和正
    • Organizer
      日本顕微鏡学会第77回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] アンチペロブスカイト型ホウ化物固溶体 CeRh3-xPdxB0.5 の構造化学2021

    • Author(s)
      湯葢 邦夫, I. Zeiringer, A. Grytsiv, P. Rogl
    • Organizer
      日本顕微鏡学会第64回シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Three-dimensional analysis of diffuse streaks in ScRh3B0.6 compound2021

    • Author(s)
      K. Yubuta, H. Ai, A. Yasuhara, A. Nomura, T. Shishido, K. Sugiyama
    • Organizer
      MATERIAL RESEARCH MEETING 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 電子回折トモグラフィによるScRh3B0.6の三次元構造解析2021

    • Author(s)
      阿井 晴佳,三平 智宏,青山 佳敬,安原 聡,湯葢 邦夫,野村 明子,宍戸 統悦,杉山 和正
    • Organizer
      日本顕微鏡学会第76回学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 準結晶の星団2021

    • Author(s)
      安原 聡,湯葢 邦夫,柴田 昌照,阿井 晴佳,青山 佳敬
    • Organizer
      日本顕微鏡学会第76回学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] B K端の吸収および発光分光法によるホウ化希土類-アルミニウム/クロム,R(Al0.95Cr0.05)B4の電子構造2020

    • Author(s)
      新部正人,Mathis Cameau,Nguyen Cuong,湯葢邦夫,近藤剛弘,松田巌
    • Organizer
      第33回日本放射光学会年会・放射光科学合同シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] Direct observation for intergrowth structures in REAlB4 (RE = Tm and Yb) compounds2019

    • Author(s)
      K. Yubuta
    • Organizer
      Interdisciplinary Symposium for Quasicrystals and Strongly Correlated Electron Systems
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Electron structure of rare-earth aluminum/chromium boride R(Al0.95Cr0.05)B4 studied by B-K soft X-ray emission and absorption spectroscopy2019

    • Author(s)
      M. Niibe, M. Cameau, N.T. Cuong, K. Yubuta, T. Kondo, I. Matsuda
    • Organizer
      The 40th International Conference on Vacuum Ultraviolet and X-ray Physics (VUVX19)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Nanostrusture with Diffuse Streaks in ScRh3B0.6 Compound Studied by Electron Microscopy2019

    • Author(s)
      K. Yubuta, A. Nomura, K. Kouzu, T. Yamasaki, S. Okada, T. Mori, K. Sugiyama, T. Shishido
    • Organizer
      The 19th International Symposium on Boron, Borides and Related Materials (ISBB 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Boron-nonstoichiometry, Solubility of Carbon, and Properties of Perovskite-Type RRh3B (R = Rare Earth)2019

    • Author(s)
      T. Shishido, A. Nomura, T. Sugawara, S. Kurosawa, K. Yubuta, K. Kouzu, T. Yamasaki, S. Okada, T. Mori, A. Yoshikawa
    • Organizer
      The 19th International Symposium on Boron, Borides and Related Materials (ISBB 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Synthesis and some properties of R(Al, Mo)B4 (R = rear earth) crystals2019

    • Author(s)
      S. Okada, K. Kouzu, T. Yamasaki, T. Mori, A. Nomura, K. Yubuta, T. Shishido, A. Yoshikawa, G. Rogl, P. Rogl
    • Organizer
      The 19th International Symposium on Boron, Borides and Related Materials (ISBB 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Syntheses and physical properties of YCrB4 and R(Al, Fe, Cr)B4 (R = Ho, Er) compounds by arc melting method2019

    • Author(s)
      S. Okada, K. Kouzu, T. Yamasaki, A. Nomura, T. Sugawara, K. Yubuta, T. Shishido, A. Yoshikawa, T. Mori, G. Rogl, P. Rogl
    • Organizer
      The 19th International Symposium on Boron, Borides and Related Materials (ISBB 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Syntheses and physical properties of Tm(Al1-xMnx)B4 crystals by Al-self flux2019

    • Author(s)
      K. Kouzu, T. Yamasaki, S. Okada, T. Mori, K. Yubuta, A. Nomura, T. Shishido, A. Yoshikawa, Y. Imai, P. Rogl
    • Organizer
      The 19th International Symposium on Boron, Borides and Related Materials (ISBB 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Intergrown nanostructures in REAlB4 (RE = Tm, Yb and Lu) compounds2019

    • Author(s)
      K. Yubuta
    • Organizer
      Workshop on Advances in Solid State Chemistry and Physics & Nanoscience for Energy Harvesting Technologies
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 層状構造を有するRE-Rh-B化合物の結晶構造解析2019

    • Author(s)
      森秀太,湯葢邦夫,杉山和正,宍戸統悦
    • Organizer
      第18回 日本金属学会東北支部研究発表大会
    • Related Report
      2019 Research-status Report
  • [Presentation] ScRh3B0.6 化合物の局所構造2019

    • Author(s)
      湯葢 邦夫,野村 明子,菅原 孝昌,吉川 彰,杉山 和正,宍戸 統悦,神津 薫, 山崎 貴,岡田 繁,森 孝雄
    • Organizer
      第14回日本フラックス成長研究会発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] R-TM-B-(C) (R = 希土類元素, TM = 遷移金属)系化合物の合成および硬さ測定を通じて得られた知見2019

    • Author(s)
      宍戸統悦,野村明子,菅原孝昌,黒澤俊介,湯葢邦夫,神津 薫,山﨑 貴,岡田 繁,森 孝雄,吉川 彰
    • Organizer
      第14回日本フラックス成長研究会発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] ThCr2Si2型を基調とするホウ化物の合成,結晶構造,磁性および熱電的性質2019

    • Author(s)
      宍戸統悦,野村明子,菅原孝昌,黒澤俊介,湯葢邦夫,神津 薫,山﨑 貴,岡田 繁,森 孝雄,吉川 彰
    • Organizer
      第14回日本フラックス成長研究会発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] Tm(Al, W)B4結晶の作製と 結晶の作製と性質2019

    • Author(s)
      岡田繁,神津薫,山﨑貴,萩原健司,森孝雄,野村明子,湯葢邦夫,宍戸統悦,吉川彰,Peter Rogl
    • Organizer
      第14回日本フラックス成長研究会発表会
    • Related Report
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    • Author(s)
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    • Organizer
      第14回日本フラックス成長研究会発表会
    • Related Report
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Published: 2019-04-18   Modified: 2023-01-30  

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