NMR Investigation of the localized and delocalized Nature of Uranium Compounds

2009 Fiscal Year Final Research Report

• Project/Area Number: 19540385
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: YASUOKA Hiroshi Japan Atomic Energy Agency, 先端基礎研究センター, 研究員 (50026027)
• Co-Investigator(Kenkyū-buntansha): KAMBE Shinsaku 日本原子力研究開発機構, 先端基礎研究センター, 研究主幹 (40224886) ; HAGA Yoshinori 日本原子力研究開発機構, 先端基礎研究センター, 研究主幹 (90354901)
• Project Period (FY): 2007 – 2009
• Keywords: 核磁気共鳴 / 重い電子系 / 局在・非局在

Research Abstract

(1) From the detailed NMR measurements for Sn and In nuclei in typical uranium compounds, USn_3 and UIn_3, we have clarified that an antiferromagnetic spin fluctuation is playing the essential role of the electronic state of high temperatures. (2) ^<27>Al NMR shift and relaxation studies have clarified an d-wave superconductivity in newly developed Np compound, NpPd_5Al_2. It is also found that high temperature spin dynamics is highly anisotropic, having dramatic decrease of the fluctuations along the c-axis at low temperature.

Research Products

• [Journal Article] Anisotropic spin fluctuations in Heavy-fermion superconductor NpPd5Al2: (2010)
  • Author(s): H. Chudo, H. Sakai, Y. Tokunaga, S. Kambe, D. Aoki, Y. Homma, Y. Haga, T.D. Matsuda, Y. Onuki, H. Yasuoka
  • Journal Title: J. Phys. Soc. Jpn. Vol.79 Pages: 053704
  • Peer Reviewed
• [Journal Article] 27Al NMR studies of NpPd5Al2 (2009)
  • Author(s): H. Chudo, H. Sakai, Y. Tokunaga, S. Kambe, D. Aoki, Y. Homma, Y. Shiokawa, Y. Haga, S. Ikeda, T.D. Matsuda, Y. Onuki, H. Yasuoka
  • Journal Title: Physcia B 404 Pages: 3216
  • Peer Reviewed
• [Journal Article] Novel phase transition in CeRu2Al10 probed by 27Al-NQR/NMR (2009)
  • Author(s): M. Matsumura, Y. Kawamura, S. Edamoto, T. Takesaka, H. Kato, T. Nishioka, Y. Tokunaga, S. Kambe, H. Yasuoka
  • Journal Title: J. Phys. Soc. Jpn. 78 Pages: 123713
  • Peer Reviewed
• [Journal Article] 27Al NMR Evidence for the Strong-Coupling d-Wave Superconductivity in NpPd5 Al2 (2008)
  • Author(s): H. Chudo, H. Sakai, Y. Tokunaga, S. Kambe, D. Aoki, Y. Homma, Y. Shiokawa, Y. Haga, S. Ikeda, T.D. Matsuda, Y. Onuki, H. Yasuoka
  • Journal Title: J. Phys. Soc. Jpn. 77 Pages: 083702-1-4
  • Peer Reviewed
• [Journal Article] 31P-NMR Study of the Neptunium-Based Filled Skutterudite NpFe4P12 (2008)
  • Author(s): Y. Tokunaga, D. Aoki, Y. Homma, H. Sakai, H. Chudo, S. Kambe, T.D. Matsuda, S. Ikeda, E. Yamamoto, A. Nakamura, Y. Haga, Y. Shiokawa, Y. Onuki, H. Yasuoka
  • Journal Title: J. Phys. Soc. Jpn. 77Suppl.A Pages: 211-213
  • Peer Reviewed
• [Journal Article] Perspective of Research on Transuranium Compounds (2007)
  • Author(s): H. Yasuoka
  • Journal Title: Online-News and Comments Vo.11
  • Peer Reviewed
• [Journal Article] 17O NMR Spin-Lattice Relaxation in NpO2: Field Dependent Cross Relaxation ProcessDriven by 237Np Spins (2007)
  • Author(s): Y. Tokunaga, R.E. Walstedt, Y. Homma, D. Aoki, S. Kambe, H. Sakai, T. Fujimoto, S. Ikeda, E. Yamamoto, A. Nakamura, Y. Shiokawa, H. Yasuoka
  • Journal Title: J. Phys. Chem. Sol. 68 Pages: 2016-2019
  • Peer Reviewed
• [Journal Article] NMR Studies of Actinide Dioxides (2007)
  • Author(s): Y. Tokunaga, H. Sakai, T. Fujimoto, S. Kambe, R.E. Walstedt, K. Ikushima, H. Yasuoka, D. Aoki, Y. Homma, Y. Haga, T.D. Matsuda, S. Ikeda, E. Yamamoto, A. Nakamura, Y. Shiokawa, K. Nakajima, Y. Arai, Y. Onuki
  • Journal Title: J. Alloys Compds. 444-445 Pages: 241
  • Peer Reviewed
• [Journal Article] Anisotropic Spin Fluctuations and Anomalies of Nuclear Quadrupole Interactions in the Itinerant Antiferromagnet NpCoGa5: 59Co NMR and 69, 71Ga NMR/NQR Studies (2007)
  • Author(s): H. Sakai, S. Kambe, Y. Tokunaga, T. Fujimoto, R.E. Walstedt, H. Yasuoka, D. Aoki, Y. Homma, E. Yamamoto, A. Nakamura, Y. Shiokawa, Y. Onuki
  • Journal Title: Phys. Rev. B 76 Pages: 024410
• [Journal Article] NMR study of actinide compounds, The NMR of actinide Nuclei (2006)
  • Author(s): R.E. Walstedt, Y. Tokunga, H. Kato, H. Sakai, T. Fujimoto, S. Kambe, H. Yasuoka
  • Journal Title: J. Phys. Soc. Jpn. Suppl.77-81
  • Peer Reviewed
• [Presentation] CeIrIn5のIn-NMR (2008)
  • Author(s): 神戸振作、安岡弘志, 他
  • Organizer: 日本物理学会
  • Year and Date: 2008-09-27
• [Presentation] 反強磁性体CePd5Al2の核磁気共鳴法による研究 (2008)
  • Author(s): 酒井宏典、安岡弘志, 他
  • Organizer: 日本物理学会
  • Year and Date: 2008-09-22
• [Presentation] USn3のスピン―スピン緩和 (2008)
  • Author(s): 神戸振作、安岡弘志, 他
  • Organizer: 日本物理学会
  • Year and Date: 2008-09-21
• [Presentation] 新規超伝導体NpPd5Al2のAl-NMRによる研究II (2008)
  • Author(s): 中堂博之、安岡弘志, 他
  • Organizer: 日本物理学会
  • Year and Date: 2008-03-26
• [Presentation] URhの結晶育成と結晶構造 (2008)
  • Author(s): 山本悦嗣、芳賀義範, 他
  • Year and Date: 2008-03-23
• [Book] プルトニウム-魅惑多き元素と化合物 (2010)
  • Author(s): 安岡弘志
  • Total Pages: 164-169
  • Publisher: 岩波書店