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Synthesis of high-entropy-alloy-type hydrogen storage compound and exploration of high-Tc superconductors

Research Project

Project/Area Number 21K18834
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionTokyo Metropolitan University

Principal Investigator

Mizuguchi Yoshikazu  東京都立大学, 理学研究科, 准教授 (50609865)

Co-Investigator(Kenkyū-buntansha) 長尾 雅則  山梨大学, 大学院総合研究部, 准教授 (10512478)
藤岡 正弥  北海道大学, 電子科学研究所, 助教 (40637740)
山下 愛智  東京都立大学, 理学研究科, 助教 (20849351)
Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywords超伝導 / 水素吸蔵 / ホール測定 / キャリア濃度 / 移動度 / 負の熱膨張 / 低温物性 / 構造解析 / ハイエントロピー合金 / 遷移金属 / ジルコニウム化合物 / 異常熱膨張 / ホール係数 / 新超伝導体 / 水素
Outline of Research at the Start

最近の超高圧下実験において,水素を含む化合物において室温に近い超伝導が観測されている.本研究では,水素を豊富に含み,かつ常圧下で安定な新超伝導体を開発し,そこに室温超伝導を実現させることを目指す.申請者らが近年開発を行っている「高エントロピー合金型(HEA型)化合物」の概念を,水素吸蔵特性を有する超伝導体TrZr2(Trは遷移金属)や様々な遷移金属,化合物に適用し,HEA化による構造安定化によって水素吸蔵特性を極限まで向上させた新しい超伝導体を開発し,常圧で高温超伝導を発現させることを目指す.

Outline of Final Research Achievements

In this study, we focused on a transition-metal zirconide superconductors TrZr2 (Tr: transition metal), which can be hydrogen-rich compounds, and synthesized new superconductors. We found that superconductivity of TrZr2 is suppressed by hydrogenation (namely, TrZr2Hx with x ~ 4). From Hall measurements, we confirmed that the suppression of superconductivity is caused by the decrease in carrier mobility. In the next work, we will try to improve mobility of TrZr2Hx. In addition, we discovered uniaxial negative thermal expansion in TrZr2. By Tr-site substitution, the uniaxial thermal expansion characteristics were largely modified.

Academic Significance and Societal Importance of the Research Achievements

本研究は,水素系高温超伝導体を低圧で実現するための物質探索という挑戦的な課題に挑んだ.その中で,水素含有量が多い超伝導体において,水素化がキャリア移動度の減少を生じさせ,超伝導特性が低下する可能性を示唆した.このことは,単純な水素化のみでなく,水素化後のキャリア移動度向上が超伝導発現に重要であることを示している.また,本研究で発見されたTrZr2の一軸的な負の熱膨張は巨大であり,今後の物質開発で体積熱膨張がゼロの超伝導体を開発し,熱サイクルに強い新たな超伝導材料を見出せる可能性がある.

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (20 results)

All 2023 2022 2021 Other

All Journal Article (11 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 11 results,  Open Access: 7 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Remarks (2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Axis thermal expansion switching in transition-metal zirconides TrZr<sub>2</sub> by tuning the c/a ratio2023

    • Author(s)
      Arima Hiroto、Riad Kasem Md.、Mizuguchi Yoshikazu
    • Journal Title

      Applied Physics Express

      Volume: 16 Issue: 3 Pages: 035503-035503

    • DOI

      10.35848/1882-0786/acc006

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Glassy atomic vibrations and blurry electronic structures created by local structural disorders in high-entropy metal telluride superconductors2023

    • Author(s)
      Mizuguchi Yoshikazu、Usui Hidetomo、Kurita Rei、Takae Kyohei、Kasem Md Riad、Matsumoto Ryo、Yamane Kazuki、Takano Yoshihiko、Nakahira Yuki、Yamashita Aichi、Goto Yosuke、Miura Akira、Moriyoshi Chikako
    • Journal Title

      Materials Today Physics

      Volume: 32 Pages: 101019-101019

    • DOI

      10.1016/j.mtphys.2023.101019

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Sign change in c-axis thermal expansion constant and lattice collapse by Ni substitution in transition-metal zirconide superconductor Co1?xNixZr22023

    • Author(s)
      Watanabe Yuto、Arima Hiroto、Usui Hidetomo、Mizuguchi Yoshikazu
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 1008-1008

    • DOI

      10.1038/s41598-023-28291-y

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Uniaxial Negative Thermal Expansion in an Orthorhombic Superconductor CoZr<sub>3</sub>2023

    • Author(s)
      Arima Hiroto、Inui Tatsuki、Yamashita Aichi、Miura Akira、Itou Hiroaki、Moriyoshi Chikako、Fujihisa Hiroshi、Mizuguchi Yoshikazu
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 92 Issue: 2 Pages: 024602-024602

    • DOI

      10.7566/jpsj.92.024602

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Superconductivity of high-entropy-alloy-type transition-metal zirconide (Fe,Co,Ni,Cu,Ga)Zr<sub>2</sub>2022

    • Author(s)
      Kasem Md Riad、Arima Hiroto、Ikeda Yoichi、Yamashita Aichi、Mizuguchi Yoshikazu
    • Journal Title

      Journal of Physics: Materials

      Volume: 5 Issue: 4 Pages: 045001-045001

    • DOI

      10.1088/2515-7639/ac8e34

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Anomalous Thermal Expansion in a CuAl2-type Superconductor CoZr22022

    • Author(s)
      Mizuguchi Yoshikazu、Kasem Md. Riad、Ikeda Yoichi
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 91 Issue: 10 Pages: 103601-103601

    • DOI

      10.7566/jpsj.91.103601

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Improvement of critical current density of REBa2Cu3O7-δ by increase in configurational entropy of mixing2022

    • Author(s)
      Yamashita Aichi、Shukunami Yuta、Mizuguchi Yoshikazu
    • Journal Title

      Royal Society Open Science

      Volume: 9 Issue: 3

    • DOI

      10.1098/rsos.211874

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fabrication of high-entropy REBa2Cu3O7-δ thin films by pulsed laser deposition2022

    • Author(s)
      Yamashita Aichi、Hashimoto Kazuki、Suzuki Shunta、Nakanishi Yusuke、Miyata Yasumitsu、Maeda Toshihiko、MIZUGUCHI Yoshikazu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: in printing Issue: 5 Pages: 050905-050905

    • DOI

      10.35848/1347-4065/ac5b39

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Superconductivity in In-doped AgSnBiTe3 with possible band inversion2021

    • Author(s)
      Mitobe Tsubasa、Hoshi Kazuhisa、Kasem Md. Riad、Kiyama Ryosuke、Usui Hidetomo、Yamashita Aichi、Higashinaka Ryuji、Matsuda Tatsuma D.、Aoki Yuji、Katase Takayoshi、Goto Yosuke、Mizuguchi Yoshikazu
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 22885-22885

    • DOI

      10.1038/s41598-021-02341-9

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anomalous broadening of specific heat jump at T <sub>c</sub> in high-entropy-alloy-type superconductor TrZr<sub>2</sub>2021

    • Author(s)
      Kasem Md Riad、Yamashita Aichi、Hatano Taishi、Sakurai Kota、Oono-Hori Naoko、Goto Yosuke、Miura Osuke、Mizuguchi Yoshikazu
    • Journal Title

      Superconductor Science and Technology

      Volume: 34 Issue: 12 Pages: 125001-125001

    • DOI

      10.1088/1361-6668/ac2554

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Synthesis of new high-entropy alloy-type Nb3 (Al, Sn, Ge, Ga, Si) superconductors2021

    • Author(s)
      Yamashita Aichi、Matsuda Tatsuma D.、Mizuguchi Yoshikazu
    • Journal Title

      Journal of Alloys and Compounds

      Volume: 868 Pages: 159233-159233

    • DOI

      10.1016/j.jallcom.2021.159233

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 遷移金属ジルコナイドにおける異方的格子熱膨張2023

    • Author(s)
      水口佳一
    • Organizer
      日本物理学会2023年年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Superconductivity of high-entropy-alloy-type compounds2022

    • Author(s)
      Yoshikazu Mizuguchi
    • Organizer
      M2S2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高エントロピー合金型熱電材料の探索2022

    • Author(s)
      水口佳一
    • Organizer
      日本物理学会第78回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 局所構造を制御した新超伝導体の開発2022

    • Author(s)
      水口佳一
    • Organizer
      金研ワークショップ(中性子)
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Material design concept for superconducting high-entropy-alloy-type compounds2021

    • Author(s)
      Yoshikazu Mizuguchi
    • Organizer
      MRM2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 高エントロピー合金型化合物TrZr2の超伝導特性2021

    • Author(s)
      水口佳一
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Remarks] 東京都立大学超伝導物質研究室

    • URL

      https://www.comp.tmu.ac.jp/eeesuper/mizuguchilab/index.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] 東京都立大学 超伝導物質研究室

    • URL

      https://www.comp.tmu.ac.jp/eeesuper/mizuguchilab/activities.html

    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] 熱膨張性を制御した遷移金属ジルコナイド及びその設計方法2022

    • Inventor(s)
      水口佳一,有馬寛人
    • Industrial Property Rights Holder
      水口佳一,有馬寛人
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-167834
    • Filing Date
      2022
    • Related Report
      2022 Annual Research Report

URL: 

Published: 2021-07-13   Modified: 2024-01-30  

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