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Low temperature study of intermediate-valence Yb-based quasicrystals

Research Project

Project/Area Number 24540386
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

WATANUKI Tetsu  独立行政法人日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究センター, 研究主幹 (30343932)

Co-Investigator(Renkei-kenkyūsha) ISHIMASA Tsutomu  北海道大学, 工学研究院, 教授 (10135270)
TSAI AnPang  東北大学, 多元物質科学研究所, 教授 (90225681)
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords金属 / 準結晶 / 量子臨界現象 / 価数揺動 / X線吸収分光
Outline of Final Research Achievements

A quasiperiodic intermediate-valence system is realized in an icosahedral Yb-Au-Al quasicrystal. X-ray absorption spectroscopy indicates that quasiperiodically arranged Yb ions assume a mean valence of 2.61, between a divalent state and a trivalent one. At temperatures below 10 K, specific heat and magnetization measurements reveal non-Fermi-liquid behavior in this quasicrystal without either doping, pressure, or field tuning. Additionally, a heterogeneous valence state is likely to be realized.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (15 results)

All 2015 2014 2012 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (12 results) (of which Invited: 1 results)

  • [Journal Article] Thermal expansion of a Au-Al-Yb intermediate valence quasicrystal2015

    • Author(s)
      T. Watanuki, S. Kashimoto, T. Ishimasa, A. Machida, S. Yamamoto, Y. Tanaka, M. Mizumaki, N. Kawamura, S. Watanabe
    • Journal Title

      Solid State Communications

      Volume: 211 Pages: 19-22

    • DOI

      10.1016/j.ssc.2015.03.008

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intermediate-valence icosahedral Au-Al-Yb quasicrystal2012

    • Author(s)
      Tetsu Watanuki、Shiro Kashimoto、Daichi Kawana、Teruo Yamazaki、Akihiko Machida、Yukinori Tanaka、Taku J.Sato
    • Journal Title

      Physical Review B

      Volume: Vol.86 Issue: 9

    • DOI

      10.1103/physrevb.86.094201

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] 中間価数状態を持つYb系準結晶の実現2012

    • Author(s)
      綿貫 徹
    • Journal Title

      放射光

      Volume: 25 Pages: 176-183

    • NAID

      10030316879

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Presentation] 中間価数Yb系近似結晶の価数の温度依存性2015

    • Author(s)
      綿貫 徹、山田庸公、中村洋子、田中幸範、新田清文、水牧仁一朗、町田晃彦、蔡安邦、石政勉
    • Organizer
      日本物理学会 第70回年次大会
    • Place of Presentation
      早稲田大学(東京都新宿区)
    • Year and Date
      2015-03-22
    • Related Report
      2014 Annual Research Report
  • [Presentation] Yb-Au-Al準結晶の低温におけるYb価数の磁場依存性2014

    • Author(s)
      綿貫 徹、水牧仁一朗、河村直己、渡辺真仁、新田清文、田中幸範、石政勉
    • Organizer
      日本物理学会 2014年秋季大会
    • Place of Presentation
      中部大学(愛知県春日井市)
    • Year and Date
      2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] Intermediate-valence Yb-based quasicrystals and approximants2014

    • Author(s)
      T. Watanuki
    • Organizer
      23rd Congress and General Assembly of the International Union of Crystallography
    • Place of Presentation
      Montreal CANADA
    • Related Report
      2013 Research-status Report
  • [Presentation] 中間価数準結晶Au-Al-YbのYb価数の圧力依存性

    • Author(s)
      綿貫 徹
    • Organizer
      日本物理学会第69回年次大会
    • Place of Presentation
      東海大学
    • Related Report
      2013 Research-status Report
  • [Presentation] Au-Al-Yb準結晶の熱膨張

    • Author(s)
      綿貫 徹
    • Organizer
      第18回準結晶研究会
    • Place of Presentation
      東京理科大学
    • Related Report
      2013 Research-status Report
  • [Presentation] 価数揺動準結晶Au-Al-Ybの価数の圧力依存性

    • Author(s)
      綿貫 徹
    • Organizer
      第54回高圧討論会
    • Place of Presentation
      朱鷺メッセ 新潟コンベンションセンター
    • Related Report
      2013 Research-status Report
  • [Presentation] 中間価数準結晶Au-Al-Ybの熱膨張

    • Author(s)
      綿貫 徹
    • Organizer
      日本物理学会2013年秋季大会
    • Place of Presentation
      徳島大学
    • Related Report
      2013 Research-status Report
  • [Presentation] Au-Al-Yb中間価数系準結晶

    • Author(s)
      綿貫 徹
    • Organizer
      日本物理学会第68回年次大会
    • Place of Presentation
      広島大学
    • Related Report
      2012 Research-status Report
  • [Presentation] Intermediate-valence Yb-based quasicrystals

    • Author(s)
      T. Watanuki
    • Organizer
      JAEA Synchrotron Radiation Research Symposium "Magnetism in Quantum Beam Science"
    • Place of Presentation
      SPring-8
    • Related Report
      2012 Research-status Report
    • Invited
  • [Presentation] Au-Al-Yb中間価数系準結晶

    • Author(s)
      綿貫 徹
    • Organizer
      第17回準結晶研究会
    • Place of Presentation
      近畿大学
    • Related Report
      2012 Research-status Report
  • [Presentation] 中間価数Yb系準結晶の価数決定と物性測定

    • Author(s)
      綿貫 徹
    • Organizer
      第53回高圧討論会
    • Place of Presentation
      大阪大学
    • Related Report
      2012 Research-status Report
  • [Presentation] Intermediate-Valence Yb-based Quasicrystals

    • Author(s)
      T. Watanuki
    • Organizer
      IUCr Commission on High Pressure 2012 Meeting "Advances in Crystallography at High Pressures" & International Symposium of the Quantum Beam Science Directorate, Japan Atomic Energy Agency
    • Place of Presentation
      Mito
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2020-05-15  

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