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High-field NMR study of novel quantum phases in quantum spin systems

Research Project

Project/Area Number 26800176
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionThe University of Tokyo

Principal Investigator

Yoshida Makoto  東京大学, 物性研究所, 助教 (40379475)

Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords磁性 / 磁気共鳴 / フラストレーション系 / 量子スピン系 / 強磁場
Outline of Final Research Achievements

By using nuclear magnetic resonance (NMR) measurements in high-magnetic fields, we have investigated novel magnets which show unusual spin states due to quantum effects. In particular, we focus on spin nematic states which are analog of crystal liquids. In a candidate material volborthite, we have found an unusual magnetic phase near 25 T, where our NMR results support the realization of a spin nematic state. In another candidate NaCuMoO4(OH), we have investigated the magnetic structure at low temperatures by using NMR. We revealed the structure and field dependence up to 15 T. These results show that this compound is well described as ferromagnetic frustrated chains, which would show a spin nematic state in higher magnetic fields.

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (5 results)

All 2015 2014

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (4 results)

  • [Journal Article] One-Third Magnetization Plateau with a Preceding Novel Phase in Volborthite2015

    • Author(s)
      Hajime Ishikawa, Makoto Yoshida, Kazuhiro Nawa, Minki Jeong, Steffen Kramer, Mladen Horvatic, Claude Berthier, Masashi Takigawa, Mitsuru Akaki, Atsushi Miyake, Masashi Tokunaga, Koichi Kindo, Junichi Yamaura, Yoshihiko Okamoto, Zenji Hiroi
    • Journal Title

      Physical Review Letters

      Volume: 114 Issue: 22 Pages: 2272021-5

    • DOI

      10.1103/physrevlett.114.227202

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] ボルボサイト低磁場相の磁気構造とスピンゆらぎ2015

    • Author(s)
      吉田誠, 山下穣, 山口明, 瀧川仁, 石川孟, 山浦淳一, 岡本佳比古, 広井善二
    • Organizer
      日本物理学会
    • Place of Presentation
      関西大学(大阪府吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] 単結晶volborthiteの強磁場NMRIII2015

    • Author(s)
      吉田誠,那波和宏,瀧川仁,M. Jeong,S. Kramer,M. Horvatic,C. Berthier,松井一樹,後藤貴行,木村尚次郎,佐々木孝彦,石川孟,山浦淳一,吉田紘行,岡本佳比古,広井善二
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学(東京都新宿区)
    • Year and Date
      2015-03-21 – 2015-03-25
    • Related Report
      2014 Research-status Report
  • [Presentation] 単結晶volborthiteの強磁場NMRII2014

    • Author(s)
      吉田誠,那波和宏,瀧川仁,M. Jeong,S. Kramer,M. Horvatic,C. Berthier,石川孟,山浦淳一,吉田紘行,岡本佳比古,広井善二
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学(愛知県春日井市)
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] High eld magnetic phases of volborthite studied by single crystal NMR2014

    • Author(s)
      M. Yoshida, K. Nawa, M. Takigawa, H. Ishikawa, Y. Okamoto, Z. Hiroi, M. Jeong, S. Kramer, M. Horvatic, C. Berthier, J. Yamaura, H. Yoshida
    • Organizer
      International Conference on Highly Frustrated Magnetism
    • Place of Presentation
      ケンブリッジ(イギリス)
    • Year and Date
      2014-07-07 – 2014-07-11
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2020-05-15  

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