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Development of precision synthesis method for iron carbide clusters and elucidation of anomalous magnetism

Research Project

Project/Area Number 21H01756
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 28030:Nanomaterials-related
Research InstitutionChitose Institute of Science and Technology (2023)
Tohoku University (2021-2022)

Principal Investigator

Wakizaka Masanori  公立千歳科学技術大学, 理工学部, 准教授 (00786840)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2022: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2021: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Keywords炭化鉄 / クラスター / 金属錯体 / 磁性 / 金属炭化物 / ナノ粒子 / 多核錯体 / サブナノ / ナノ磁性 / ナノ磁石 / グラファイト / 表面
Outline of Research at the Start

申請者はサブナノサイズの炭化鉄を世界で初めて合成した。驚くべきことに、これが室温でも保磁力が残る異常な磁性を示すことを発見した。通常は1 nmを切るサイズでは超常磁性のため極低温にしなければ磁石にならない。この磁気メカニズムを解明できれば超常磁性限界を打ち破るブレイクスルーになる。一方、少核クラスターの精密合成と磁気メカニズムに課題が残されている。そこで、本研究で炭化鉄クラスターの精密合成法を確立し、この特異的な磁性発現のメカニズムを明らかにする。

Outline of Final Research Achievements

The purpose of this study is to establish a precise synthesis method for iron carbide clusters having ferromagnetism and to elucidate the magnetic mechanism. Furthermore, to understand such extremely small magnet properties, this work synthesized and elucidated the quantum magnetic properties of single molecule magnets, single ion magnets, and spin qubits. This work achieved the following four main results: (1) Elucidation of magnetism of iron carbide clusters supported on the graphitic carbon support, (2) Synthesis and elucidation of magnetic of anionic polynuclear complexes using citric acid ligands, (3) Synthesis and elucidation of quantum magnetisms of Co(II)- and Cu(II)-doped metal-organic frameworks (4) Synthesis and elucidation of quantum magnetism of Cu(II) one-dimensional chain compounds.

Academic Significance and Societal Importance of the Research Achievements

ハードディスクの心臓部である磁気記憶素子にはナノサイズの磁石が使われている。ナノ磁石1つ1つに0または 1の情報が保存されるため、磁石をより小さくすれば記憶密度と容量が向上する。しかしやっかいなことに、磁石 をナノレベルまで小さくすると超常磁性と呼ばれる磁気現象が現れ、室温ではもはや磁石として働かなくなってしま う。従来のナノ磁石よりもさらに小さいクラスター磁石を作ることができれば、次世代の超高密度磁気記憶素子として社会の発展に大きく貢献できる。本成果により炭化鉄とグラファイト担体の相互作用が磁力を増強する効果があることがわかり、今後のナノ磁石やクラスター磁石開発に資すると期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (20 results)

All 2024 2023 2022 2021

All Journal Article (11 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 11 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Journal Article] Citric acid as multidentate flexible ligand for multinuclear late‐3d‐metal complexes and single‐molecule magnets2024

    • Author(s)
      Wakizaka Masanori、Yamashita Masahiro
    • Journal Title

      European Journal of Inorganic Chemistry

      Volume: 2024 Issue: 12

    • DOI

      10.1002/ejic.202300740

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spin qubits of Cu(II) doped in Zn(II) metal?organic frameworks above microsecond phase memory time2024

    • Author(s)
      Wakizaka Masanori、Gupta Shraddha、Wan Qingyun、Takaishi Shinya、Noro Honoka、Sato Kazunobu、Yamashita Masahiro
    • Journal Title

      Chemistry - A European Journal

      Volume: 30 Issue: 12

    • DOI

      10.1002/chem.202304202

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Creation of a Field‐Induced Co(II) Single‐Ion Magnet by Doping into a Zn(II) Diamagnetic Metal?Organic Framework2023

    • Author(s)
      Wakizaka Masanori、Ishikawa Ryuta、Tanaka Hisaaki、Gupta Shraddha、Takaishi Shinya、Yamashita Masahiro
    • Journal Title

      Small

      Volume: 19 Issue: 32 Pages: 2301966-2301966

    • DOI

      10.1002/smll.202301966

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spin dynamics in a Heisenberg weak antiferromagnetic chain of an iodide-bridged Cu(II) complex2023

    • Author(s)
      Wakizaka Masanori、Arczynski Miroslaw、Gupta Shraddha、Takaishi Shinya、Yamashita Masahiro
    • Journal Title

      Dalton Transactions

      Volume: 52 Issue: 30 Pages: 10294-10297

    • DOI

      10.1039/d3dt01840g

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Switching of the redox centers of a tris-2-mercaptophenolato chromium(<scp>iii</scp>) metalloligand by a guest metal ion2023

    • Author(s)
      Wakizaka Masanori、Matsumoto Takeshi、Chang Ho-Chol
    • Journal Title

      Dalton Transactions

      Volume: 52 Issue: 6 Pages: 1538-1542

    • DOI

      10.1039/d2dt03502b

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intramolecular Ferromagnetism in Di‐Nuclear 3d‐Transition‐Metal Single‐Molecule Magnets by Pseudo‐Serial Arrangement2023

    • Author(s)
      Wakizaka Masanori、Sato Tetsu、Yoshino Yuko、Takaishi Shinya、Yamashita Masahiro
    • Journal Title

      Chemistry - A European Journal

      Volume: 29 Issue: 13

    • DOI

      10.1002/chem.202203421

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Synthesis and magnetic properties of sub-nanosized iron carbides on a carbon support2022

    • Author(s)
      Masanori Wakizaka, Wang-Jae Chun, Takane Imaoka, Kimihisa Yamamoto
    • Journal Title

      RSC Advance

      Volume: 12 Issue: 6 Pages: 3238-3242

    • DOI

      10.1039/d1ra09191c

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Macro- and atomic-scale observations of a one-dimensional heterojunction in a nickel and palladium nanowire complex2022

    • Author(s)
      Wakizaka Masanori、Kumagai Shohei、Wu Hashen、Sonobe Takuya、Iguchi Hiroaki、Yoshida Takefumi、Yamashita Masahiro、Takaishi Shinya
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 1188-1188

    • DOI

      10.1038/s41467-022-28875-8

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Ni(III) Mott-Hubbard-like State Containing High-Spin Ni(II) in a Semiconductive Bromide-Bridged Ni-Chain Compound2022

    • Author(s)
      Wakizaka Masanori、Mian Mohammad Rasel、Yoshida Takefumi、Sato Tetsu、Tanaka Hisaaki、Miyamoto Tatsuya、Okamoto Hiroshi、Takaishi Shinya、Iguchi Hiroaki、Yamashita Masahiro
    • Journal Title

      Inorganic Chemistry

      Volume: 61 Issue: 25 Pages: 9504-9513

    • DOI

      10.1021/acs.inorgchem.2c00473

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Trimetallic Mixture of Ni(III), Pd(III) and Au(III) Ions in a Molecule-Based Bromide-Bridged MX-Chain Compound2022

    • Author(s)
      Wakizaka Masanori、Wu Hashen、Li Zhao-Yang、Iguchi Hiroaki、Takaishi Shinya、Yamashita Masahiro
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 95 Issue: 7 Pages: 1032-1038

    • DOI

      10.1246/bcsj.20220137

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Surface Ohmic Conductivity on a Mott Insulator Based on a One‐dimensional Bromide‐bridged Nickel(III) Complex2021

    • Author(s)
      Wakizaka Masanori、Iguchi Hiroaki、Takaishi Shinya、Yamashita Masahiro
    • Journal Title

      Chemistry - An Asian Journal

      Volume: 16 Issue: 19 Pages: 2947-2951

    • DOI

      10.1002/asia.202100637

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Creation of quantum spin system doped in metal-organic frameworks2023

    • Author(s)
      Masanori Wakizaka
    • Organizer
      The 18th International Conference on Molecule-Based Magnets Rising Star Symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Creation of Co(II) Single-Ion Magnets by Doping into Zn(II) Diamagnetic Metal-Organic Frameworks2023

    • Author(s)
      Masanori Wakizaka, Masahiro Yamashita
    • Organizer
      8th International Conference on Superconductivity and Magnetism
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Creation of doped metal-organic-frameworks exhibiting quantum spin dynamics2023

    • Author(s)
      Masanori Wakizaka, Masahiro Yamashita
    • Organizer
      錯体化学第73回討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Latest progress on halogen-bridged metal complex chemistry2023

    • Author(s)
      Masanori Wakizaka, Shinya Takaishi, Masahiro Yamashita
    • Organizer
      日本化学会第103春季年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Ni(III) Mott-Hubbard-like State Containing High-Spin Ni(II) in a Semiconductive Bromide-Bridged Ni-Chain Compound2022

    • Author(s)
      Masanori Wakizaka, Mohammad Rasel Mian, Hiroaki Iguchi, Shinya Takaishi, Masahiro Yamashita
    • Organizer
      錯体化学第72回討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Macro- and atomic-scale observations of a one-dimensional heterojunction in a nickel and palladium nanowire complex2022

    • Author(s)
      Masanori Wakizaka, Hiroaki Iguchi, Masahiro Yamashita, Shinya Takaishi
    • Organizer
      8th Asian Conference on Coordination Chemistry
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Low-spin Ni(III) and high-spin Ni(II) mixed-valency in the bromide-bridged Ni-chain complex2022

    • Author(s)
      Masanori Wakizaka, Mohammad Rasel Mian, Hiroaki Iguchi, Shinya Takaishi, Masahiro Yamashita
    • Organizer
      2nd Asian Conference on Molecular Magnetism
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Particle-size-dependent transformation between Mo carbide and oxycarbide at 1.3 nm2021

    • Author(s)
      Masanori Wakizaka
    • Organizer
      The 2021 International Chemical Congress of Pacific Basin Societies
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Macro- and atomic-scale observations for one-dimensional heterojunction in a nickel and palladium nanowire complex2021

    • Author(s)
      Masanori Wakizaka, Hiroaki Iguchi, Shinya Takaishi, Masahiro Yamashita
    • Organizer
      錯体化学第71回討論会
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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