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2010 Fiscal Year Final Research Report

Microscopic Investigation of the coexistence state of Magnetism and Superconductivity in Uranium-based Heavy-Fermion Superconductors

Research Project

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Project/Area Number 20340088
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

ISHIDA Kenji  Kyoto University, 大学院・理学研究科, 教授 (90243196)

Project Period (FY) 2008 – 2010
Keywords磁気共鳴
Research Abstract

We have studied coexistence of ferromagnetism and superconductivity in ferromagnetic superconductor of UCoGe from the microscopic NMR measurement using a high-quality single crystal. Below the ferromagnetic transition, whole region of the sample is in ferromagnetic state, and a nearly half of the region becomes superconductive below Tc. We also have investigated magnetic fluctuations in the compound, and found that longitudinal ferromagnetic fluctuations along the ordered moments directed to the c axis is dominant at low temperatures. The magnetic fluctuations we observed have been suggested to be favorable for spin-triplet superconductivity from theoretical point of view. These results suggest the possibility that spin-triplet superconductivity is realized in UCoGe.

  • Research Products

    (45 results)

All 2011 2010 2009 2008 Other

All Journal Article (17 results) Presentation (27 results) Remarks (1 results)

  • [Journal Article] 超伝導と磁性の共存2011

    • Author(s)
      石田憲二
    • Journal Title

      パリティ Vol.26 No.1

      Pages: 30-31

  • [Journal Article] U系重い電子超伝導体UCoGeにおける新奇な超伝導状態-コバルト核四重極共鳴(<59>^Co NQR)実験による強磁性と超伝導の微視的共存-2010

    • Author(s)
      石田憲二, 服部泰佑, 井原慶彦, 中井祐介, 佐藤憲昭, 出口和彦, 田村暢之, 佐藤伊佐務
    • Journal Title

      固体物理 Vol.46, No.6

      Pages: 25-33

  • [Journal Article] 層状ルテニウム酸化物超伝導体Sr2RuO4の核磁気共鳴実験-スピン三重項超伝導のd-vectorの問題-2010

    • Author(s)
      石田憲二
    • Journal Title

      物性研究 Vol.95 No.1

      Pages: 1-33

  • [Journal Article] Chemical Pressure and Physical Pressure in BaFe_2(As_<1-x>P_x)_22010

    • Author(s)
      L.E.Klintberg, Swee K.Goh, S.Kasahara, Y.Nakai, K.Ishida, M.Sutherland, T.Shibauchi, Y.Matsuda, T.Terashima
    • Journal Title

      J.Phys.Soc.Jpn. 79

      Pages: 123706 1-4

  • [Journal Article] Anisotropic magnetic fluctuations in the ferromagnetic superconductor UCoGe studied by directional-dependent <59>^Co NMR measurements2010

    • Author(s)
      Y.Ihara, T.Hattori, K.Ishida, Y.Nakai, E.Osaki, K.Deguchi, N.K.Sato, I.Satoh
    • Journal Title

      Physical Review Letter 105

      Pages: 206403 1-4

  • [Journal Article] Anisotropic superconducting properties of optimally doped BaFe_2(As_0.65P_0.35)_2 under pressure2010

    • Author(s)
      Swee K.Goh, Y.Nakai, K.Ishida, L.E.Klinberg, Y.Ihara, S.Kasahara, T.Shibauchi, Y.Matsuda, T.Terashima
    • Journal Title

      Physical Review B 82

      Pages: 094502 1-5

  • [Journal Article] Unconventional Superconductivity and Antiferromagnetic Quantum Critical Behavior in the Isovalent-Doped BaFe_2(As_<1-x>P_x)_22010

    • Author(s)
      Y.Nakai, T.Iye, S.Kitagawa, K.Ishida, H.Ikeda, S.Kasahara, H.Shishido, T.Shibauchi, Y.Matsuda, T.Terashima
    • Journal Title

      Physical Review Letter 105

      Pages: 107003 1-4

  • [Journal Article] Stripe antiferromagnetic correlations in LaFeAsO_1-xF_x probed by <75>^As NMR2010

    • Author(s)
      S.Kitagawa, Y.Nakai, T.Iye, K.Ishida, Y.Kamihara, M.Hirano, H.Hosono
    • Journal Title

      Physical Review B 81

      Pages: 212502 1-4

  • [Journal Article] Weakly first-order behavior in ferromagnetic transition of UCoGe revealed by Co-59-NQR studies2010

    • Author(s)
      T.Hattori, K.Ishida, Y.Nakai, T.Ohta, K.Deguchi,, N.K.Sato, I.Satoh
    • Journal Title

      Physica C-Superconductivity and its applications 470 Suppl. 1

      Pages: S561-S563

  • [Journal Article] Microscopic Coexistence of Ferromagnetism and Superconductivity in Single-Crystal UCoGe2010

    • Author(s)
      T.Ohta, T.Hattori, K.Ishida, Y.Nakai, E.Osaki, K.Deguchi, N.K.Sato, I.Satoh
    • Journal Title

      J.Phys.Soc.Jpn. 79

      Pages: 023707-1-4

  • [Journal Article] 31P and 75As NMR evidence for a residual density of states at zero energy in superconducting BaFe_2(As_0.67P_0.33)_22010

    • Author(s)
      Y.Nakai, T.Iye, S.Kitagawa, K.Ishida, S.Kasahara, T.Shibauchi, Y.Matsuda, T.Terashima
    • Journal Title

      Phys.Rev.B 81

      Pages: 020503 1-4(R)

  • [Journal Article] Two Dimensional Spin Dynamics in the Itinerant Ferromagnet LaCoPO Revealed by Magnetization and <31>^P-NMR Measurements2009

    • Author(s)
      H.Sugawara, K.Ishida, Y.Nakai, H.Yanagi, T.Kamiya, Y.Kamihara, M.Hirano, H.Hosono
    • Journal Title

      J.Phys.Soc.Jpn. 78

      Pages: 113705 1-4

  • [Journal Article] <75>^As and <139>^La NMR studies on LaFeAs(O_<1-x>As_x)2009

    • Author(s)
      K.Ishida, Y.Nakai, S.Kitagawa, Y.Kamihara, M.Hirano, H.Hosono
    • Journal Title

      Physica B 404

      Pages: 3089-3094

  • [Journal Article] To What Extent Iron-Pnictide New Superconductors Have Been Clarified : A Progress Report2009

    • Author(s)
      K.Ishida, Y.Nakai, H.Hosono
    • Journal Title

      J.Phys.Soc.Jpn. 78

      Pages: 062001 1-20

  • [Journal Article] An NMR study on the F-doping evolution of the iron oxypnictide LaFeAs(O_<1-x>F_x)2009

    • Author(s)
      Y.Nakai, S.Kitagawa, K.Ishida, Y.Kamihara, M.Hirano, H.Hosono
    • Journal Title

      New Journal of Physics 11

      Pages: 045004 1-15

  • [Journal Article] Magnetic anomalies of hydrous cobaltate compound Nax(H3O)zCoO2・yH2O detected by NMR and NQR measurements2009

    • Author(s)
      Y.Ihara, H.Takeya, K.Ishida
    • Journal Title

      Phys.Rev.B 79

      Pages: 24510 1-10

  • [Journal Article] Evolution from Itinerant Antiferromagnet to Unconventional Superconductor with Fluorine Doping in LaFeAs(O1-xFx) Revealed by <75>^As and <139>^La Nuclear Magnetic Resonance2008

    • Author(s)
      Y.Nakai, K.Ishida, Y.Kamihara, M.Hirano, H.Hosono
    • Journal Title

      J.Phys.Soc.Jpn 77

      Pages: 073701 1-4

  • [Presentation] CaFe2(As_<1-x>P_x)_2のNMR/NQR2011

    • Author(s)
      中井祐介, 前川紘紀, 北川俊作, 家哲也, 石田憲二, 笠原成, 芝内孝禎, 松田祐司, 寺嶋孝仁
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学五十嵐キャンパス
    • Year and Date
      2011-03-28
  • [Presentation] 鉄系超伝導体BaFe2(As_<1-x>P_x)_2の磁性と超伝導のNMRによる研究2011

    • Author(s)
      家哲也, 中井祐介, 北川俊作, 石田憲二, 笠原成, 芝内孝禎, 松田祐司, 寺嶋孝仁
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学五十嵐キャンパス
    • Year and Date
      2011-03-28
  • [Presentation] 鉄系超伝導体LaFe(As_<1-x>P_x)OにおけるNMR/NQR2011

    • Author(s)
      北川俊作, 中井祐介, 石田憲二, Cao Wang, Guanghan Cao, Zhu-an Xu
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学五十嵐キャンパス
    • Year and Date
      2011-03-28
  • [Presentation] Uni_2Al_3の角度分解27Al-NMR測定2011

    • Author(s)
      軽部皓介, 服部泰佑, 石田憲二, 佐藤憲昭
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学五十嵐キャンパス
    • Year and Date
      2011-03-25
  • [Presentation] 単結晶UCoGeにおける超伝導状態の<59>^Co NMRナイトシフト測定2011

    • Author(s)
      服部泰佑, 軽部皓介, 井原慶彦, 石田憲二, 田村暢之, 出口和彦, 佐藤憲昭, 佐藤伊佐務
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学五十嵐キャンパス
    • Year and Date
      2011-03-25
  • [Presentation] <59>^Co-NQR and NMR Studies on Ferromagnetic Superconductor UCoGe2010

    • Author(s)
      石田憲二
    • Organizer
      Physical Phenomena High magnetic Phenomena 2010
    • Place of Presentation
      Tallahassee Florida USA
    • Year and Date
      2010-12-07
  • [Presentation] <59>^Co-NQR and NMR Studies on Ferromagnetic Superconductor UCoGe2010

    • Author(s)
      石田憲二
    • Organizer
      The 11^<th> Asia Pacific Physics Conference (APPC11)
    • Place of Presentation
      Shanghai 中国
    • Year and Date
      2010-11-17
  • [Presentation] NMR Studies on Iron-based Superconductors2010

    • Author(s)
      石田憲二
    • Organizer
      ISS2010
    • Place of Presentation
      つくば 日本
    • Year and Date
      2010-11-03
  • [Presentation] NMR Studies on Iron-based Superconductors2010

    • Author(s)
      石田憲二
    • Organizer
      ICMM 2010
    • Place of Presentation
      コルカタ インド
    • Year and Date
      2010-10-28
  • [Presentation] NMR Studies on Iron-based Superconductors2010

    • Author(s)
      石田憲二
    • Organizer
      International and Interdisciplinary Workshop on Novel PhenomenaIn Integrated Complex Science : from Non-living to Living System
    • Place of Presentation
      コープイン京都 日本
    • Year and Date
      2010-10-11
  • [Presentation] 単結晶UCoGeを用いた<59>^Coサイトの角度分解NMR2010

    • Author(s)
      服部泰佑, 井原慶彦, 軽部皓介, 石田憲二, 田村暢之, 出口和彦, 佐藤憲昭, 佐藤伊佐務
    • Organizer
      日本物理学会 2010年秋季大会
    • Place of Presentation
      大阪府立大学中百舌鳥キャンパス
    • Year and Date
      2010-09-25
  • [Presentation] <59>^Co-NMRを用いた単結晶UCoGeの異方的磁気励起の研究2010

    • Author(s)
      井原慶彦, 服部泰佑, 軽部皓介, 石田憲二, 田村暢之, 出口和彦, 佐藤憲昭, 佐藤伊佐務
    • Organizer
      日本物理学会 2010年秋季大会
    • Place of Presentation
      大阪府立大学中百舌鳥キャンパス
    • Year and Date
      2010-09-25
  • [Presentation] 鉄系超伝導体BaFe_2(As_<1-x>P_x)_2の高P濃度域におけるNMR2010

    • Author(s)
      中井祐介, S.K.Goh, 家哲也, 北川俊作, 石田憲二, 笠原成, 芝内孝禎, 松田祐司, 寺嶋孝仁
    • Organizer
      日本物理学会 2010年秋季大会
    • Place of Presentation
      大阪府立大学中百舌鳥キャンパス
    • Year and Date
      2010-09-24
  • [Presentation] 鉄系超伝導体BaFe_2(As_<1-x>P_x)_2の低P濃度域におけるNMR2010

    • Author(s)
      家哲也, 中井祐介, 北川俊作, 石田憲二, 笠原成, 芝内孝禎, 松田祐司, 寺嶋孝仁
    • Organizer
      日本物理学会 2010年秋季大会
    • Place of Presentation
      日本物理学会2010年秋季大会
    • Year and Date
      2010-09-24
  • [Presentation] YCoGe, LaCoGeの<59>^Co-NQR/NMRを用いた磁性の研究2010

    • Author(s)
      軽部皓介, 服部泰佑, 井原慶彦, 石田憲二, 田村暢之, 出口和彦, 佐藤憲昭
    • Organizer
      日本物理学会 2010年秋季大会
    • Place of Presentation
      大阪府立大学中百舌鳥キャンパス
    • Year and Date
      2010-09-23
  • [Presentation] <75>^As-NMRから見た鉄系超伝導体LaFeAsO_0.85における不純物効果2010

    • Author(s)
      北川俊作, 中井祐介, 石田憲二, Yanfeng Guo, Youguo Shi, 山浦一成, 室町英治
    • Organizer
      日本物理学会 2010年秋季大会
    • Place of Presentation
      大阪府立大学中百舌鳥キャンパス
    • Year and Date
      2010-09-23
  • [Presentation] <59>^Co-NQR and NMR Studies on Ferromagnetic Superconductor UCoGe2010

    • Author(s)
      石田憲二
    • Organizer
      France International Workshop: On the Heavy Fermion Road, 30 Aug.-1 Sept.
    • Place of Presentation
      ESPCI Paris
    • Year and Date
      2010-08-30
  • [Presentation] NMR Studies on Iron-based Superconductors Interplay between Superconductivity and Magnetism2010

    • Author(s)
      石田憲二
    • Organizer
      ICC-IMR
    • Place of Presentation
      東北大学 仙台
    • Year and Date
      2010-08-11
  • [Presentation] NMR Studies on Iron-based Superconductors Interplay between Superconductivity and Magnetism2010

    • Author(s)
      石田憲二
    • Organizer
      ICTP Workshop : Principles and Design of Strongly Correlated Electronic Systems
    • Place of Presentation
      ICTP Trieste, Italy
    • Year and Date
      2010-08-04
  • [Presentation] NMR Studies on Iron-based Superconductor BaFe_2(As_<1-x>P_x)_2 Interplay between Superconductivity and Magnetism2010

    • Author(s)
      石田憲二
    • Organizer
      2010 Hangzhou Workshop on Quantum Matter
    • Place of Presentation
      Hangzhou, China
    • Year and Date
      2010-05-18
  • [Presentation] NMR Studies on Iron-based Superconductor Interplay between Superconductivity and Magnetism2010

    • Author(s)
      石田憲二
    • Organizer
      International Conference on Superconductivity and Magnetism (ICSM 2010)
    • Place of Presentation
      Antalya Turkey
    • Year and Date
      2010-04-27
  • [Presentation] "NMR Studies on Iron Superconductors" Workshop"鉄系高温超伝導体研究の最前線"2009

    • Author(s)
      石田憲二
    • Organizer
      (独)日本原子力研究開発機構
    • Place of Presentation
      上野(日本)
    • Year and Date
      2009-11-28
  • [Presentation] Nuclear-Magnetic-Resonance Studies on Sr_2RuO_4 and Ferromagnetic Superconductor UCoGe2009

    • Author(s)
      石田憲二
    • Organizer
      Novel Spin Paring 2009
    • Place of Presentation
      Panasonic Auditorium, Yukawa Memorial Hall, Kyoto University , Kyoto, Japan
    • Year and Date
      2009-09-14
  • [Presentation] NMR Studies on LaFeAs(O_<1-x>F_x) and Related Compounds2009

    • Author(s)
      石田憲二
    • Organizer
      9^<th> International Conference on Materials and Mechanisms of Superconductivity (M2S-IX)
    • Place of Presentation
      京王プラザホテル・新宿
    • Year and Date
      2009-09-11
  • [Presentation] Comparative NMR Studies on Iron Pnictide Systems LaFeXO (X=As, P)2009

    • Author(s)
      中井祐介
    • Organizer
      9^<th> International Conference on Materials and Mechanisms of Superconductivity (M2S-IX)
    • Place of Presentation
      京王プラザホテル・新宿
    • Year and Date
      2009-09-09
  • [Presentation] <75>^As-NMR Studies of Anisotropic Spin Fluctuations in LaFeAs(O_<1-x>F_x)2009

    • Author(s)
      北川俊作
    • Organizer
      9^<th> International Conference on Materials and Mechanisms of Superconductivity (M2S-IX)
    • Place of Presentation
      京王プラザホテル・新宿
    • Year and Date
      2009-09-09
  • [Presentation] Microscopic Coexistence of Ferromagnetism and Superconductivity in UCoGe2009

    • Author(s)
      石田憲二
    • Organizer
      9^<th> International Conference on Materials and Mechanisms of Superconductivity (M2S-IX)
    • Place of Presentation
      京王プラザホテル・新宿
    • Year and Date
      2009-09-08
  • [Remarks] ホームページ等

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

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