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Study of frustrated rare-earth intermetallic compounds

Research Project

Project/Area Number 20540344
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionSaitama University

Principal Investigator

KOSAKA Masashi  Saitama University, 大学院・理工学研究科, 准教授 (20302507)

Co-Investigator(Renkei-kenkyūsha) OHOYAMA Kenji  東北大学, 金属材料研究所, 准教授 (60241569)
MITO Takeshi  兵庫県立大学, 物質理学研究科, 准教授 (70335420)
MATSUMURA Takeshi  広島大学, 先端物質科学研究科, 准教授 (00312546)
SUZUKI Hiroyuki  独立行政法人物質・材料研究機構, 主任研究員 (60354370)
METOKI Naoto  特殊法人日本原子力研究所, 先端基礎研究センター, 主任研究員 (40343909)
YOSHIZAWA Masahito  岩手大学, 大学院・工学研究科, 教授 (30220619)
NAKANISHI Yoshiki  岩手大学, 大学院・工学研究科, 准教授 (70322964)
Project Period (FY) 2008 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords強相関系 / 強相関電子系 / 磁性 / フラストレーション / 低温物性 / 希土類金属間化合物 / 中性子散乱 / 核磁気共鳴 / 放光射
Research Abstract

We found that the intermetallic compound YbAl_3C_3 exhibits an spin-singlet ground state at low temperatures. The structure of the first excited triplet state, which develops rapidly below 10K, is directly clarified by inelastic neutron scattering experiments with a higher energy resolution. The spin-singlet ground state has never been observed in 4f electron systems. The two-dimensional frustrated triangular lattice and the low carrier density play an important role in the realization of the spin-singlet ground state. In order to investigate physical properties of YbAl_3C_3, we have performed synchrotron X-ray diffraction, NMR・NQR, specific heat, magnetization, electrical resistivity and elastic constant measurements.

Report

(4 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (18 results)

All 2010 2009 2008 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (8 results) Remarks (4 results)

  • [Journal Article] ^<27>Al NMR/NQR Studies of YbAl_3C_32009

    • Author(s)
      T.Mito, S.Tomisawa, S.Wada, H.Harima, K.Hashi, T.Shimizu, A.Goto, S.Ohki, Y.Kato, M.Kosaka
    • Journal Title

      J.Phys.Soc.Jpn. 78

      Pages: 14709-14709

    • NAID

      110007042098

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] 27Al NMR/NQR Studies of YbAl3C32009

    • Author(s)
      T. Mito, M. Kosaka, 他8名
    • Journal Title

      Journal of Physical Society of Japan 78

    • NAID

      130005437161

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spin-Singlet Ground State in the Two-Dimensional Frustrated Triangular Lattice : YbAl_3C_32008

    • Author(s)
      Y.Kato, M.Kosaka, H.Nowatari, Y.Saiga, A.Yamada, T.Kobiyama, S.Katano, K.Ohoyama, H.S.Suzuki, N.Aso, K.Iwasa
    • Journal Title

      J.Phys.Soc.Jpn. 77

      Pages: 53701-53701

    • NAID

      110006665978

    • URL

      http://sucra.saitama-u.ac.jp/modules/xoonips/detail.php?id=A1002708

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Structural Phase Transition in the Spin Gap System YbAl_3C_32008

    • Author(s)
      T.Matsumura, T.Inami, M.Kosaka, Y.Kato, T.Inukai, A.Ochiai, H.Nakao, Y.Murakami, S.Katano, H.S.Suzuki
    • Journal Title

      J.Phys.Soc.Jpn. 77

      Pages: 103601-103601

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Spin-Singlet Ground State in the Two-Dimensional Frustrated Triangular Lattice: YbAl3C32008

    • Author(s)
      Y. Kato, MKosaka, 他9名
    • Journal Title

      Journal of Physical Society of Japan 77

    • NAID

      130005436459

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structural Phase Transition in the Spin Gap System YbAl3C32008

    • Author(s)
      T. Matsumura, M. Kosaka,他8名
    • Journal Title

      Journal of Physical Society of Japan 77

    • NAID

      130005436102

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] YbAl_3C_3のパルス磁場中超音波測定2010

    • Author(s)
      七宮史崇,吉澤正人,三田村裕幸,中西良樹,小坂昌史,榊原俊郎,金道浩一
    • Organizer
      日本物理学会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2010-09-23
    • Related Report
      2010 Annual Research Report 2010 Final Research Report
  • [Presentation] Inelastic neutron scattering study of spin gap formation in YbAl_3C_32010

    • Author(s)
      D.T.Adroja, K.A.McEwen, M.Kosaka, 他
    • Organizer
      International Conference on Strongly Correlated Electron Systems
    • Place of Presentation
      Santa Fe, NM, USA
    • Year and Date
      2010-06-29
    • Related Report
      2010 Final Research Report
  • [Presentation] Inelastic neutron scattering study of spin gap formation in YbAl_3C_32010

    • Author(s)
      D.T.Adroja, M.Kosaka, 他10名
    • Organizer
      International Conference on Strongly Correlated Electron Systems
    • Place of Presentation
      米国,ニューメキシコ州,サンタフェ
    • Year and Date
      2010-06-29
    • Related Report
      2010 Annual Research Report
  • [Presentation] Yb_3F_4S_2の単結晶育成と物性2009

    • Author(s)
      小坂昌史,小檜山卓也,近藤健司,岩田広太郎,片野進,香取浩子,白川直樹
    • Organizer
      日本物理学会
    • Place of Presentation
      熊本大学
    • Year and Date
      2009-09-28
    • Related Report
      2010 Final Research Report
  • [Presentation] RNiP(R=Ce,Nd)の磁性2009

    • Author(s)
      近藤健司,小坂昌史,片野進,香取浩子
    • Organizer
      日本物理学会
    • Place of Presentation
      熊本大学
    • Year and Date
      2009-09-25
    • Related Report
      2010 Final Research Report
  • [Presentation] YbAl_3C_3の相転移点近傍における磁場中弾性特性2009

    • Author(s)
      中西良樹,七宮史崇,上山徹,出戸和久,柏崎礼子,吉澤正人,小檜山卓也,小坂昌史,片野進
    • Organizer
      日本物理学会
    • Place of Presentation
      熊本大学
    • Year and Date
      2009-09-25
    • Related Report
      2010 Final Research Report 2009 Annual Research Report
  • [Presentation] YbAl_3C_3の低温相結晶構造とスピンギャップ形成2008

    • Author(s)
      松村武,稲見俊哉,加藤慶顕,小坂昌史,狗飼敬希,落合明,中尾裕則,村上洋一,片野進,鈴木博之
    • Organizer
      日本物理学会
    • Place of Presentation
      岩手大学
    • Year and Date
      2008-09-20
    • Related Report
      2010 Final Research Report
  • [Presentation] YbAl3C3の低温相結晶構造とスピンギャップ形成2008

    • Author(s)
      松村武,小坂昌史,他8名
    • Organizer
      日本物理学会
    • Place of Presentation
      岩手大学
    • Year and Date
      2008-09-20
    • Related Report
      2008 Annual Research Report
  • [Remarks] ホームページ等

    • URL

      http://www.phy.saitama-u.ac.jp/hp/

    • Related Report
      2010 Final Research Report
  • [Remarks]

    • URL

      http://www.phy.saitama-u.ac.jp/hp/

    • Related Report
      2010 Annual Research Report
  • [Remarks]

    • URL

      http://www.phy.saitama-u.ac.jp/hp/

    • Related Report
      2009 Annual Research Report
  • [Remarks]

    • URL

      http://www.phy.saitama-u.ac.jp/hp/

    • Related Report
      2008 Annual Research Report

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Published: 2008-04-01   Modified: 2020-05-15  

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