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2010 Fiscal Year Final Research Report

Experimental studies of ferromagnetic superconductivity and valence fluctuation effect under high pressure

Research Project

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Project/Area Number 20340090
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

KOBAYASHI Tatsuo  Okayama University, 大学院・自然科学研究科, 教授 (80205468)

Project Period (FY) 2008 – 2010
Keywords超伝導 / 強磁性 / 価数転移 / 高圧実験
Research Abstract

The existence of two structural phase transitions is discovered in a ferromagnet UIr. The ferromagnetic critical point and the superconductivity belong to the high-pressure phase III. Phase III is unstable at low temperatures, which may causes the small Meissner effect. In CeCu_2Si_2, the anomalous Hall effect is observed in the pressure region of enhanced T_c, which may be attributed to the charge fluctuation due to the valence transition of Ce ions and then may be related to the enhancement of T_c.

  • Research Products

    (26 results)

All 2011 2010 2009 2008 Other

All Journal Article (10 results) (of which Peer Reviewed: 9 results) Presentation (14 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Heat capacity and ac-susceptibility measurements of SmOs_4Sb_<12> under high pressure2011

    • Author(s)
      T.C.Kobayashi, K.Miyazawa, K.Tabira, Y.Ikeda, S.Araki, H.Kotegawa, H.Sugawara, D.Kikuchi, H.Sato
    • Journal Title

      J.Phys.Soc.Jpn.Suppl.

    • Peer Reviewed
  • [Journal Article] Hall effect in CeCu_2Si_2 under pressure2011

    • Author(s)
      S.Araki, Y.Shiroyama, Y.Ikeda, T.C.Kobayashi, S.Seiro, C.Geibel, F.Steglich
    • Journal Title

      J.Phys.Soc.Jpn.Suppl.

    • Peer Reviewed
  • [Journal Article] Superconductivity of heavy carriers in the pressure-induced phases in Cd_2Re_2O_72011

    • Author(s)
      T.C.Kobayashi, Y.Irie, J.Yamaura, Z.Hiroi, K.Murata
    • Journal Title

      J.Phys.Soc.Jpn. 80

      Pages: 023715(4)

    • Peer Reviewed
  • [Journal Article] NQR study of pressure induced superconductivity in CeCu_2Si_22010

    • Author(s)
      K.Fujiwara, Y.Okazaki, Y.Hata, K.Miyoshi, J.Takeuchi, T.C.Kobayashi, C.Geibel, F.Steglich
    • Journal Title

      Phys.Status Solidi B 247

      Pages: 608-610

  • [Journal Article] Pressure and magnetic field tuned quantum critical point in the Kondo antiferromagnet CePtZn2009

    • Author(s)
      S.K.Dhar, R.Kulkarni, H.Hidaka, Y.Toda, H.Kotegawa, T.C.Kobayashi, P.Manfrinetti, A.Provino
    • Journal Title

      J.Phys.: Condens. Matter 21

      Pages: 156001

    • Peer Reviewed
  • [Journal Article] Pressure Effect on Yb-Based Strongly Correlated Electron Systems2009

    • Author(s)
      T.Mito, M.Otani, M.Nakamura, T.Koyama, S.Wada, H.Kotegawa, T.C.Kobayashi, B.Idzikowski, M.Reiffers, J.L.Sarrao
    • Journal Title

      Acta Physica Polonica A 115

      Pages: 47-52

    • Peer Reviewed
  • [Journal Article] High pressure NQR measurement in CeCu_2Si_2 up to sudden disappearance of superconductivity2008

    • Author(s)
      K.Fujiwara, Y.Hata, K.Kobayashi, K.Miyoshi, J.Takeuchi, Y.Shimaoka, H.Kotegawa, T.C.Kobayashi, C.Geibel, F.Steglich
    • Journal Title

      J.Phys.Soc.Jpn. 77(editors' choice)

      Pages: 123711(4)

    • Peer Reviewed
  • [Journal Article] Unconventional superconductivity in f-electron systems2008

    • Author(s)
      Y.Onuki, R.Settai, T.Takeuchi, Y.Haga, E.Yamamoto, N.Tateiwa, M.Nakashima, H.Shishido, T.C.Kobayashi, D.Aoki
    • Journal Title

      J.Korean Phys.Soc. 53

      Pages: 1034-1040

    • Peer Reviewed
  • [Journal Article] Anomalous Kondo effect and ordered state in heavy fermion system SmOs_4Sb_<12> : Resistivity, Sb-NQR, and magnetization measurements under high pressure2008

    • Author(s)
      H.Kotegawa, K.Tabira, Y.Irie, H.Hidaka, T.C.Kobayashi, D.Kikuchi, K.Tanaka, S.Tatsuoka, H.Sugawara, H.Sato
    • Journal Title

      J.Phys.Soc.Jpn.Suppl.A 77

      Pages: 90-95

    • Peer Reviewed
  • [Journal Article] Sb-NQR study of PrOs_4Sb_<12> under high pressure2008

    • Author(s)
      S.Kawasaki, K.Katayama, M.Nishiyama, H.Kotegawa, T.C.Kobayashi, H.Sugawara, D.Kikuchi, H.Sato, G.-q.Zheng
    • Journal Title

      J.Phys.Soc.Jpn.Suppl.A 77

      Pages: 330-332

    • Peer Reviewed
  • [Presentation] 高圧下におけるSmOs_4Sb_<12>の交流比熱測定2010

    • Author(s)
      川嵜靖広, 宮澤和己, 荒木新吾, 池田陽一, 小林達生, 小手川恒, 菅原仁, 菊池大輔, 佐藤英行
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      20100923-20100926
  • [Presentation] Ce(Ni,Co)Sn系における価数転移温度の圧力・元素置換効果2010

    • Author(s)
      池田陽一, 伊藤佑壮, 荒木新吾, 小林達生
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      20100923-20100926
  • [Presentation] 単結晶CeCu_2Si_2の圧力下基礎物性測定2010

    • Author(s)
      荒木新吾, 池田陽一, 城山祐貴, 伊藤佑壮, 林田みなみ, 小林達生, S.Seiro, C.Geibel, F.Steglich
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      20100923-20100926
  • [Presentation] 単結晶CeCu_2Si_2の高圧下Hall効果2010

    • Author(s)
      城山祐貴, 池田陽一, 荒木新吾, 小林達生, S.Seiro, C.Geibel, F.Steglich
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      大阪府立大学
    • Year and Date
      20100923-20100926
  • [Presentation] SmOs_4Sb_<12>の高圧下比熱測定2010

    • Author(s)
      宮澤和己, 荒木新吾, 小林達生, 小手川恒, 菊地大輔 菅原仁, 佐藤英行
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学
    • Year and Date
      20100320-20100323
  • [Presentation] CeCu_2Si_2の高圧下Hall測定2010

    • Author(s)
      城山裕貴, 荒木新吾, 小林達生, S.Seiro, C.Geibel, F.Steglich
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学
    • Year and Date
      20100320-20100323
  • [Presentation] U_3P_4の圧力誘起強磁性・非磁性転移2010

    • Author(s)
      荒木新吾, 真鍋博紀, 小林達生, 稲田佳彦, 村田恵三, P.Wisniewski, 青木大, 大貫惇睦, 山本悦嗣, 芳賀芳範, 藤原賢二
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学
    • Year and Date
      20100320-20100323
  • [Presentation] Heat capacity measurement of SmOs_4Sb_<12> under high pressure2010

    • Author(s)
      T.C.Kobayashi, K.Miyazawa, Y.Ikeda, S.Araki, H.Kotegawa, H.Sugawara, D.Kikuchi, H.Sato
    • Organizer
      International Conference on Heavy Electrons 2010
    • Place of Presentation
      首都大学東京
    • Year and Date
      2010-09-19
  • [Presentation] Hall effect in CeCu_2Si_2 under pressure2010

    • Author(s)
      S.Araki, Y.Shiroyama, Y.Ikeda, T.C.Kobayashi, S.Seiro, C.Geibel, F.Steglich
    • Organizer
      ICHE 2010
    • Place of Presentation
      首都大学東京
    • Year and Date
      2010-09-19
  • [Presentation] ^<63>Cu NQR study of CeCu_2Si_2 under high pressure2010

    • Author(s)
      K.Fujiwara, Y.Okazaki, K.Miyoshi, J.Takeuchi, T.C.Kobayashi, C.Geibel, F.Steglich
    • Organizer
      ICHE2010
    • Place of Presentation
      首都大学東京
    • Year and Date
      2010-09-19
  • [Presentation] 高圧下精密物性測定によるf電子系化合物の量子相転移と超伝導の研究2009

    • Author(s)
      小林達生
    • Organizer
      新学術領域研究「重い電子系の形成と秩序化」第2回研究会
    • Place of Presentation
      広島大学
    • Year and Date
      20090818-20090820
  • [Presentation] 遍歴強磁性体U_3P_4の圧力効果2009

    • Author(s)
      眞鍋博紀, 堀彰宏, 小林達生, 竹下直, 稲田佳彦, P.Wisniewski, 青木大, 山本悦嗣, 芳賀芳範, 大貫惇睦
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      20090327-20090330
  • [Presentation] パイロクロア酸化物Cd_2Re_2O_7の圧力効果2009

    • Author(s)
      入江祐太, 堀彰宏, 小林達生, 廣井善二, 村田惠三
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      20090327-20090330
  • [Presentation] NQR study of pressure-induced superconductivity in CeCu_2Si_22009

    • Author(s)
      K.Fujiwara, Y.Okazaki, Y.Hata, K.Miyoshi, J.Takeuchi, T.C.Kobayashi, C.Geibel, F.Steglich
    • Organizer
      International Conference on Quantum Criticality and Novel Phases
    • Place of Presentation
      Dresden, Germany
    • Year and Date
      2009-08-03
  • [Remarks] ホームページ等

    • URL

      http://www.physics.okayama-u.ac.jp/kobayashi_homepage/kobayashi_lab.htm

  • [Patent(Industrial Property Rights)] 微小試料装着構造とその方法2010

    • Inventor(s)
      岸證, 高田昌樹, 小林達生
    • Industrial Property Rights Holder
      株式会社リガク,財団法人高輝度光科学研究センター,国立大学法人岡山大学
    • Industrial Property Number
      特許,特許第4453821号
    • Acquisition Date
      2010-02-12

URL: 

Published: 2012-01-26   Modified: 2016-04-21  

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