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2008 Fiscal Year Final Research Report

Search and Studies for New Superconductors in Frustrated Systems

Research Project

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Project/Area Number 16076209
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionNagoya University

Principal Investigator

SATO Masatoshi  Nagoya University, 大学院・理学研究科, 教授 (40092225)

Co-Investigator(Renkei-kenkyūsha) MUROMACHI Eiji  物質・材料研究機構, フェロー (30343833)
Project Period (FY) 2004 – 2008
Keywords超伝導 / 物質開発
Research Abstract

銅酸化物高温超伝導体以後初の3d電子超伝導体であるNa_xCoO_2・yH_2Oの超伝導状態を、特に、その2次元三角格子がもつ幾何学的フラストレーションに注目しながら多様な実験手段で研究した。その結果、この系が、大方の予想に反して、スピン一重項の超伝導電子対を持つことを確立した。また、類似系でいくつかの超伝導体を発見した。さらに、各種フラストレート系酸化物の異常ホール効果、マルチフェロイック現象に新規物質・物性を開拓した。

  • Research Products

    (26 results)

All 2009 2008 2007 2006 2005 2004

All Journal Article (12 results) (of which Peer Reviewed: 11 results) Presentation (11 results) Book (3 results)

  • [Journal Article] Distinct transport behaviors of LaFe1-yCoyAsO1-xFx (x=0.11) between the superconducting and nonsuperconducting metallic y regions divided by y 〜 0.052009

    • Author(s)
      S. C. Lee, A. Kawabata, T. Moyoshi, Y. Kobayashi and M. Sato
    • Journal Title

      J. Phys. Soc. Jpn. 78 No. 4

      Pages: 043703(1-4)

    • Peer Reviewed
  • [Journal Article] Magnetic Excitations of NaxCoO2・yD2O -Neutron Scattering-2008

    • Author(s)
      T. Moyoshi, Y. Yasui, Y. Kobayashi, M. Sato and K. Kakurai
    • Journal Title

      J. Phys. Soc. Jpn. 77 No. 7

      Pages: 073709(1-4)

    • Peer Reviewed
  • [Journal Article] Evolution of electronic states in RCoO3 (R=rare earth): Heat capacity measurements2008

    • Author(s)
      Tachibana M, Yoshida T, Kawaji H, Atake T, and Takayama-Muromachi E
    • Journal Title

      PHYSICAL REVIEW B 77

      Pages: 094402/1-5

    • Peer Reviewed
  • [Journal Article] コバルト酸化物の超伝導2008

    • Author(s)
      佐藤正俊
    • Journal Title

      パリティ 23 No. 5

      Pages: 17-21

  • [Journal Article] Ferroelectric Transition Induced by the Incommensurate Magnetic Ordering in LiCuVO42007

    • Author(s)
      Y. Naito, K. Sato, Y. Yasui, Y. Kobayashi, Y. Kobayashi and M. Sato
    • Journal Title

      J. Phys. Soc. Jpn. 76 No. 2

      Pages: 023708(1-3)

    • Peer Reviewed
  • [Journal Article] Structure of the monoclinic-form misfit-layer compound, (Ca0.85OH)2αCoO2 (α〜0.57822)2007

    • Author(s)
      Isobe M, Onoda M, Shizuya M, Tanaka M and Takayama-Muromachi E
    • Journal Title

      PHYSICAL REVIEW B 129

      Pages: 14585-14596

    • Peer Reviewed
  • [Journal Article] Studies of the Anomalous Hall Effect and Magnetic Structure of Nd2Mo2O7 - Test of the Chirality Mechanism-2006

    • Author(s)
      Y. Yasui, T. Kageyama, T. Moyoshi, M. Soda, M. Sato and K. Kakurai
    • Journal Title

      J. Phys. Soc. Jpn. 75 No. 8

      Pages: 84711-(1-11)

    • Peer Reviewed
  • [Journal Article] Valence and Na content dependences of superconductivity in NaxCoO2-yH2O2006

    • Author(s)
      Sakurai H, Tsujii N, Suzuki O, Kitazawa H, Kido G, Takada K, Sasaki T, and Takayama-Muromachi E
    • Journal Title

      PHYSICAL REVIEW B 74

      Pages: 092502/1-4

    • Peer Reviewed
  • [Journal Article] Magnetic Correlation of NaxCoO2 and Successive Phase Transitions of Na0.5CoO2-NMR and Neutron Diffraction Studies-2005

    • Author(s)
      M. Yokoi, T. Moyoshi, Y. Kobayashi, M. Soda, Y. Yasui, M. Sato and K. Kakurai
    • Journal Title

      J. Phys. Soc. Jpn. 74 No. 11

      Pages: 3046-3056

    • Peer Reviewed
  • [Journal Article] 59Co-NMR Knight Shift of Aligned Crystals and Polycrystalline Samples of Superconducting Na0.3CoO2・1.3H2O2005

    • Author(s)
      Y. Kobayashi, H. Watanabe, M.Yokoi, T. Moyoshi, Y. Mori and M. Sato
    • Journal Title

      J. Phys. Soc. Jpn. 74 No.6

      Pages: 1800-1805

    • Peer Reviewed
  • [Journal Article] Phase diagram of superconducting NaxCoO2-yH2O2005

    • Author(s)
      Sakurai H, Takada K, Sasaki T and Takayama-Muromachi E
    • Journal Title

      JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 74

      Pages: 2909-2912

    • Peer Reviewed
  • [Journal Article] Dilanian RA, and Sasaki T A new superconducting phase of sodium cobalt oxide2004

    • Author(s)
      Takada K, Sakurai H, Takayama-Muromachi E, Izumi F
    • Journal Title

      ADVANCED MATERIALS 16

      Pages: 1901-1905

    • Peer Reviewed
  • [Presentation] On the Superconducting State of NaxCoO2・yH2O Int2008

    • Author(s)
      M. Sato, Y. Kobayashi, M. Yokoi and T. Moyoshi
    • Organizer
      Int. Symposium on Anomalous Quantum Materials 2008 and the 7th Asis-Pacific Workshop
    • Place of Presentation
      Tokyo
    • Year and Date
      20081108-10
  • [Presentation] Relationship between Magnetic Structure and Ferroelectricity of Systems with CuO2 Ribbon Chains2008

    • Author(s)
      M. Sato
    • Organizer
      Int. Symposium on Structure-Property Relationship in Solid State Materials
    • Place of Presentation
      Nantes France
    • Year and Date
      20080629-0703
  • [Presentation] Ferrimagnetic Ordered perovskite of Sr8Cu4ARe3O24 (A=Sr, Ca) prepared under high pressure2008

    • Author(s)
      Takayama-Muromachi E
    • Organizer
      Magnetic Materials & Their Applications for 21st Century
    • Place of Presentation
      National Physical Laboratory, India, New Delhi, India
    • Year and Date
      2008-10-21
  • [Presentation] High pressure synthesis and physical property measurements of perovskite transition-metal oxides2008

    • Author(s)
      Takayama-Muromachi E
    • Organizer
      XXI Congress and General Assembly of the International Union of Crystallography(IUCr2008)
    • Place of Presentation
      大阪国際会議場
    • Year and Date
      2008-08-27
  • [Presentation] Chemical aspect of the sodium cobalt oxyhydrate superconductor2008

    • Author(s)
      akayama-Muromachi E
    • Organizer
      International Conference on Electronic Materials 2008
    • Place of Presentation
      Hilton Sydney, Sydney, Australia
    • Year and Date
      2008-07-28
  • [Presentation] 高温超伝導研究とその後の物質開発2007

    • Author(s)
      佐藤 正俊
    • Organizer
      第18回佐々木学術講演会
    • Place of Presentation
      東京大学山上会館
    • Year and Date
      20071221-22
  • [Presentation] Nontrivial な磁気構造を持つ系の異常ホール効果-パイロクロア系、スピングラス系を中心に-2007

    • Author(s)
      佐藤正俊
    • Organizer
      日本応用磁気学会第25回化合物新磁性材料研究会「磁気的フラストレーションが誘起する異常磁気伝導現象‐異常ホール効果を中心に」
    • Place of Presentation
      青山学院大学
    • Year and Date
      2007-06-20
  • [Presentation] Unusual Behavior of the Anomalous Hall Effect of Systems with Non-Trivial Magnetic Structures2006

    • Author(s)
      M. Sato
    • Organizer
      Int. Conf. Magnetism Kyoto
    • Place of Presentation
      Kyoto
    • Year and Date
      20060820-25
  • [Presentation] NMR and Neutron Scattering Studies on the Superconductivity of NaxCoO2.yH2O2006

    • Author(s)
      M. Sato
    • Organizer
      First International Workshop on the Physical Properties of the Lamellar Cobaltates
    • Place of Presentation
      Orsay France
    • Year and Date
      20060716-17
  • [Presentation] Research and Development of Fine Ceramics-Roadmaps in Japan and Strategies in NIMS2006

    • Author(s)
      Takayama-Muromachi E and Kishi T
    • Organizer
      The 1st International Congress on Ceramics(ICC)
    • Place of Presentation
      Westin Harbour Castle, Toronto, Canada
    • Year and Date
      2006-06-26
  • [Presentation] Search for New Superconductors and Related Materials2005

    • Author(s)
      Takayama-Muromachi E
    • Organizer
      8th International Symposium on Superconductivity
    • Place of Presentation
      つくば国際会議場
    • Year and Date
      2005-10-24
  • [Book] コバルト酸化物の超伝導, 「新超電導物質探索に関する調査」報告書2008

    • Author(s)
      佐藤正俊、小形正男
    • Total Pages
      126-132
  • [Book] Nova Science Publishers Phase diagram for Nax(H3O)zCoO2-yH2O, New Research on Superconductivity(B. P. Martins (Ed))2007

    • Author(s)
      Y. Ihara, K. Ishida, H. Sakurai and E. Takayama-Muromachi
    • Total Pages
      59-103
    • Publisher
      New Research on Superconductivity
  • [Book] Physics and Chemistry of the Cobalt Oxide Hydrate Superconductor, Frontiers in Superconducting Materials(A. V. Narlikar (Ed))2005

    • Author(s)
      K. Takada, H. Sakurai and E. Takayama-Muromachi
    • Total Pages
      651-682
    • Publisher
      Springer

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Published: 2010-06-10   Modified: 2016-04-21  

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