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Muon-spin-relaxation study of the fluctuated state of vortices in the nano-scaled high-T_c superconductors

Research Project

Project/Area Number 19740191
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Condensed matter physics II
Research InstitutionTohoku University

Principal Investigator

ADACHI Tadashi  Tohoku University, 大学院・工学研究科, 助教 (40333843)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,570,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywords銅酸化物高温超伝導体 / 不均一超伝導 / ミュオンスピン緩和 / ボルテックスゆらぎ / ビスマス系超伝導体 / ランタン系超伝導体 / La系超伝導体 / Bi系超伝導体 / 非磁性不純物Zn / 磁気相関 / ナノスケール不均一超伝導 / 磁化率 / 比熱
Research Abstract

最適ドープ領域の高温超伝導体において縦磁場下ミュオンスピン緩和実験を行った.その結果,Bi_2Sr_2Ca_<1-x>Y_xCu_2O_<8+δ>(BSCCO)において,20ガウスの磁場下で,T_cよりもはるかに高い150K以下でミュオンスピン緩和率の増大を観測した.これは,超伝導のゆらぎの状態におけるボルテックスのゆらぎのために,試料内の磁場が不均一になったためと考えられる.以上のことから,BSCCOにおいて,T_c以上でボルテックスのゆらぎの状態が実現している可能性が高いと結論した.

Report

(3 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • Research Products

    (41 results)

All 2009 2008 2007

All Journal Article (22 results) (of which Peer Reviewed: 22 results) Presentation (19 results)

  • [Journal Article] Anomalous enhancement of vortex pinning and microscopic phase separation in the overdoped regime of La_<2-x>Sr_xCuO_42009

    • Author(s)
      Y. Tanabe, T. Adachi, H. Sato, K. Omori, Y. Koike
    • Journal Title

      Journal of Physics Conference Series 150巻

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Possible inhomogeneity of superconductivity in (Y, Ca)Ba_2Cu_3O_<7-δ> probed by magnetic susceptibility and specific heat2009

    • Author(s)
      S. Chamura, T. Adachi, Y. Tanabe, Y. Koike
    • Journal Title

      Journal of Physics Conference Series 150巻

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Anomalous criticality in the electrical resistivity of La_<2-x>Sr1xCuO_42009

    • Author(s)
      R. A. Cooper
    • Journal Title

      Science 323

      Pages: 603-607

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Energy gaps in the failed high-Te superconductor La_<1.875>Ba_<0.125>CuO_42009

    • Author(s)
      R. -H. He
    • Journal Title

      Nature Physics 5

      Pages: 119-123

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Enhancement of electronic anomalies in iron-substituted La_<2-x>SrxCu_<l-y>FeyO_4 around X=0.222009

    • Author(s)
      T. Adachi
    • Journal Title

      Journal of the Physical Society of Japan 78

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Change of the dynamics of internal fields in the normal state of La_<2-x>Sr_xCuO_4 Observed by muon-spin-relaxation2008

    • Author(s)
      I. Watanabe, T. Adachi, S. Yairi, Y. Koike, K. Nagamine
    • Journal Title

      Journal of the Physical Society of Japan 77巻

    • NAID

      110007021691

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Inhomogeneous superconducting state in the overdoped regime of La_<2-x>Sr_xCuO_4 : Comparison with the superconducting state of NbSe_22008

    • Author(s)
      Y. Tanabe, T. Adachi, K. Omori, H. Sato, T. Noji, Y. Koike
    • Journal Title

      Journal of Physics and Chemistry of Solids 69巻

      Pages: 3217-3220

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Effects of Zn and Ni substitution on the Cu spin dynamics and superconductivity in La_<2-x>Sr_xCu_<1-y>(Zn, Ni)_yO_4 (x=0.15-0.20) : Muon spin relaxation and magnetic susceptibility study2008

    • Author(s)
      T. Adachi, N, Oki, Risdiana, S. Yairi, Y. Koike, I. Watanabe
    • Journal Title

      Physical Review B 78巻

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Inhomogeneous superconductivity in both underdoped and overdoped regimes of high-T_c cuprates2008

    • Author(s)
      Y. Koike, T. Adachi, Y. Tanabe, K. Omori, T. Noji, H. Sato
    • Journal Title

      Journal of Physics Conference Series 108巻

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Inhomogeneous superconductivity in both underdoped and overdoped regimes of high-Te cuprates2008

    • Author(s)
      Y. Koike
    • Journal Title

      Journal of Physics : Conference Series 108

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Precise measurements of the dynamics of local fields in the underdoped regime of La_<2-x>SrxCuO_4 by μSR2008

    • Author(s)
      L. Watanabe
    • Journal Title

      Journal of Physics : Conference Series 108

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of Zn and Ni substitution on the Cu spin dynamics and superconductivity in La_<2-x>SrxCu_<1-y>(Zn,Ni)yO_4(x=0.15-0.20) : Muon spin relaxation and magnetic susceptibility study2008

    • Author(s)
      T. Adachi
    • Journal Title

      Physical Review B 78

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Inhomogeneous superconducting state in the overdoped regime of La_<2-x>SrxCuO_4 : Comparison with the superconducting state of NbSe_22008

    • Author(s)
      Y Tanabe
    • Journal Title

      Journal of Physics and Chemistry of Solids 69

      Pages: 3217-220

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Change of the dynamics of internal fields in the normal state of La_<2-x>SrxCuO_4 observed by muon-spin-relaxation2008

    • Author(s)
      I. Watanabe
    • Journal Title

      Journal of the Physical Society of Japan 77

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Cu spin dynamics in the overdoped regime of La_<2-x>Sr_xCu_<1-y>Zn_yO_4 probed by muon spin relaxation2008

    • Author(s)
      Risdiana
    • Journal Title

      Physical Review B 77

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Possible microscopic phase separation in the overdoped regime of La_<2-x>Sr_xCuO_4 studied by the magnetic susceptibility and electrical resistivity2007

    • Author(s)
      Y. Tanabe
    • Journal Title

      Physica C 460-462

      Pages: 376-377

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] μSR study of impurity effects on the Cu-spin fluctuations in the overdoped regime of La_<2-x>Sr_xCu_<1-y>Zn_yO_42007

    • Author(s)
      Risdiana
    • Journal Title

      Physica C 460-462

      Pages: 874-875

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] μSR study of effects of rare-earth moments on the 1/8 anomaly in the excess-oxygen-doped high-T_c cuprates La_<2-x>A_xCuO_<4+δ> (A = Eu, Pr)2007

    • Author(s)
      T. Adachi
    • Journal Title

      Physica C 460-462

      Pages: 1169-1171

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Relationship between the Cu-spin fluctuation and superconductivity in La_<2-x>Sr_xCu_<1-y> (Zn,Ni)_yO_4 (x = 0.15) studied by the μSR and magnetic susceptibility2007

    • Author(s)
      T. Adachi
    • Journal Title

      Physica C 460-462

      Pages: 1172-1173

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Possible phase separation in the underdoped La_<2-x>Sr_xCuO_4 studied by the magnetic susceptibility2007

    • Author(s)
      K. Omori
    • Journal Title

      Physica C 460-462

      Pages: 1184-1185

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Weak-coupling d-wave BCS superconductivity and unpaired electrons in overdoped La_<2-x>Sr_xCuO_4 single crystals2007

    • Author(s)
      Y. Wang
    • Journal Title

      Physical Review B 76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic-field-induced enhancement of the vortex pinning in the overdoped regime of La_<2-x>Sr_xCuO_4: Relation to the microscopic phase separation2007

    • Author(s)
      Y, Tanabe
    • Journal Title

      Journal of the Physical Society of Japan 76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] 磁化率と比熱から見たY_<1-x>Ca_xBa_2Cu_3O_<7-δ>のアンダードープ領域における超伝導の不均一性2009

    • Author(s)
      茶村慎吾
    • Organizer
      日本物理 学会第64回年次大会
    • Place of Presentation
      立教学院(東京)
    • Year and Date
      2009-03-30
    • Related Report
      2008 Final Research Report
  • [Presentation] Feを部分置換したLa_<2-x>SrxCu_<1-y>FeyO_4のx=0.22近傍における電子異常の増大2009

    • Author(s)
      足立匡
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教学院(東京)
    • Year and Date
      2009-03-27
    • Related Report
      2008 Annual Research Report
  • [Presentation] Pr_<1-x>LaCe_xCuO_<4-δ>(x=0.11-0.20)における磁化率と比熱から見た超伝導の不均一性2008

    • Author(s)
      福本勝久
    • Organizer
      第63回応用物理学会東北支部学術講演会
    • Place of Presentation
      東北大学(仙台)
    • Year and Date
      2008-12-04
    • Related Report
      2008 Final Research Report
  • [Presentation] La214系高温超伝導体における電気抵抗率から見たストライプ相関に対する磁場効果2008

    • Author(s)
      足立匡
    • Organizer
      物性領域横断研究会-スピンが拓く物性科学の最前線-
    • Place of Presentation
      東京大学(東京)
    • Year and Date
      2008-11-30
    • Related Report
      2008 Annual Research Report
  • [Presentation] 酸化物高温超伝導体における電子的不均一性とストライプ相関2008

    • Author(s)
      足立匡
    • Organizer
      平成20年度大阪大学グローバルCOE若手秋の学校「多元環境下の量子物質相の研究」
    • Place of Presentation
      休暇村讃岐五色台(坂出)
    • Year and Date
      2008-11-15
    • Related Report
      2008 Final Research Report
  • [Presentation] Inhomogeneity of superconductivity in single-layer high-T_c cuprates studied by magnetic susceptibility and specific heat2008

    • Author(s)
      T. Adachi
    • Organizer
      The 2^<nd> International Symposium on Anomalous Quantum Materials (ISAQM2008)
    • Place of Presentation
      Tokyo (Japan)
    • Year and Date
      2008-11-08
    • Related Report
      2008 Final Research Report
  • [Presentation] Inhomogeneity of superconductivity in single-layer high-Tc cuprates studied by magnetic susceptibility and specific heat2008

    • Author(s)
      T. Adachi
    • Organizer
      The International Symposium on Anomalous Quantum Materials 2008 and the 7^<th> Asia-Pacific Workshop
    • Place of Presentation
      Tokyo (Japan)
    • Year and Date
      2008-11-08
    • Related Report
      2008 Annual Research Report
  • [Presentation] Cu-spin dynamics in the normal state of high-Te cuprates probed by muon spin relaxation2008

    • Author(s)
      T. Adachi
    • Organizer
      ICC-IMR Workshop on 'Inelastic Neutron and X-ray Seatterine- in Styrtnyly Cmrrelsted Electron Systems
    • Place of Presentation
      Sendai (Japan)
    • Year and Date
      2008-10-02
    • Related Report
      2008 Annual Research Report
  • [Presentation] Inhomogeneity of superconductivity in high-T_c cuprates studied by magnetic susceptibility and specific heat2008

    • Author(s)
      Y. Koike
    • Organizer
      2^<nd> CoMePhS Workshop in Controlling Phase Separation in Electronic Systems (CoMePhS2008)
    • Place of Presentation
      Nafplion (Greece)
    • Year and Date
      2008-10-01
    • Related Report
      2008 Final Research Report
  • [Presentation] Pr<1-x>LaCe_xCuO_<4-δ>における磁化率と比熱から見た超伝導の不均一性2008

    • Author(s)
      福本勝久
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      岩手大学(盛岡)
    • Year and Date
      2008-09-22
    • Related Report
      2008 Final Research Report
  • [Presentation] La_<2-x>SrxCuO_4のx=0.21近傍における磁場中面内電気抵抗率とストライプ相関2008

    • Author(s)
      足立匡
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      岩手大学(盛岡)
    • Year and Date
      2008-09-22
    • Related Report
      2008 Annual Research Report
  • [Presentation] 磁化率と比熱から見た銅酸化物高温超伝導体の不均一な超伝導状態2008

    • Author(s)
      小池洋二
    • Organizer
      2008年秋季第69回応用物理学会学術講演会
    • Place of Presentation
      中部大学(春日井)
    • Year and Date
      2008-09-04
    • Related Report
      2008 Final Research Report
  • [Presentation] Possible inhomogeneity of superconductivity in (Y,Ca)Ba_2Cu_3O_<7-δ> probed by magnetic susceptibility and specific heat2008

    • Author(s)
      S. Chamura
    • Organizer
      25^<th> International Conference on Low Temperature Physics (LT25)
    • Place of Presentation
      Amsterdam (Netherlands)
    • Year and Date
      2008-08-12
    • Related Report
      2008 Final Research Report
  • [Presentation] Anomalous enhancement of vortex pinning and microscopic phase separation in the overdoped regime of La_<2-x>Sr_xCuO2008

    • Author(s)
      Y. Tanabe
    • Organizer
      25^<th> International Conference on Low Temperature Physics (LT25)
    • Place of Presentation
      Amsterdam (Netherlands)
    • Year and Date
      2008-08-08
    • Related Report
      2008 Final Research Report
  • [Presentation] Inhomogeneity of superconductivity and stripe correlations in single-layer high-T_c cuprates2008

    • Author(s)
      T. Adachi
    • Organizer
      6^<th> International Conference on the Stripes Series (Stripes08) - Quantum Phenomena in Complex Matter -
    • Place of Presentation
      Erice (Italy)
    • Year and Date
      2008-07-28
    • Related Report
      2008 Final Research Report
  • [Presentation] Inhomogeneity of superconductivity and stripe correlations in single-layer high-Tc, cuprates2008

    • Author(s)
      T. Adachi
    • Organizer
      6th International Conference on the Stripes Series (Stripes 08)-Quantum Phenomena in Complex Matter-
    • Place of Presentation
      Erice-Sicily (Italy)
    • Year and Date
      2008-07-28
    • Related Report
      2008 Annual Research Report
  • [Presentation] (Bi,Pb)_2Sr_2CuO_<6+δ>におけるバルクプローブから見た超伝導の不均一性2008

    • Author(s)
      足立匡
    • Organizer
      日本物理学会第63回年次大会
    • Place of Presentation
      近畿大学(東大阪)
    • Year and Date
      2008-03-25
    • Related Report
      2007 Annual Research Report
  • [Presentation] μSR study of the effects of magnetic and nonmagnetic impurities on the Cu-spin dynamics in La-214 high-T_c superconductors2008

    • Author(s)
      T. Adachi
    • Organizer
      International Symposium on Pulsed Neutron and Muon Sciences (IPS08)
    • Place of Presentation
      Ibarakiken Shichouson Kaikai, Mito, Japan
    • Year and Date
      2008-03-06
    • Related Report
      2007 Annual Research Report
  • [Presentation] La_<2-x>Sr_xCuO_4の不足-最適ドープ域における磁化率,比熱と超伝導の不均一性2007

    • Author(s)
      足立匡
    • Organizer
      日本物理学会第62回年次大会
    • Place of Presentation
      北海道大学(札幌)
    • Year and Date
      2007-09-23
    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2020-05-15  

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