Studies of multipole ordering and the dimer ground state in the rare-earth compounds

2011 Fiscal Year Final Research Report

• Project/Area Number: 21540364
• 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: Hiroshima University
• Principal Investigator: SERA Masafumi 広島大学, 大学院・先端物質科学研究科, 教授 (40196978)
• Co-Investigator(Kenkyū-buntansha): TANIDA Hiroshi 広島大学, 大学院・先端物質科学研究科, 助教 (00452615)
• Project Period (FY): 2009 – 2011
• Keywords: 多極子秩序 / 隠れた秩序 / 近藤効果 / 結晶場 / 一重項基底状態 / 近藤半導体

Research Abstract

As for CeB_6 system showing a multipole order, we succeeded to observe the order parameters of O_<xy> and Txyz directly by the resonant X-ray scattering. By the study of the pressure effect on phase IV of Ce_<0. 8> La_<0. 2> B_6, we found that the results were difficult to understand by the octupole order proposed previously. As for CeT_2Al_<10>, we found that the origin of the order is magnetic, the spin singlet is closely associated with the long range order in this system, the electronic state has a two-dimensional nature and the anisotropic c-f hybridization plays an important role in the unusual long range order.

Research Products

• [Journal Article] Magnetic Anisotropy of Kondo Semiconductor CeT2Al10(T=Ru, Os) in the Ordered State (2012)
  • Author(s): H. Tanida, Y. Nonaka, D. Tanaka, M. Sera, Y. Kawamura, Y. Uwatoko, T. Nishioka and M. Matsumura
  • Journal Title: Phys. Rev. B
  • Peer Reviewed
• [Journal Article] Electronic structure and localized lantanide character of LnT_2Al_<10>(T=Ru, Os) (2011)
  • Author(s): H. Tanida, D. Tanaka, M. Sera, S. Tanimoto, T. Nishioka, M. Matsumura, M. Ogawa, C. Moriyoshi, Y. Kuroiwa, J. E. Kim, N. Tsuji, and M. Takata
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 115128-1-8
  • Peer Reviewed
• [Journal Article] Angle-resolved^<27> Al NMR study on CeRu_2Al_<10> single crystal : Evidence of internal magnetic field and unusual spin orientation in the field induced ordered phase (2011)
  • Author(s): H. Tanida, D. Tanaka, Y. Nonaka, M. Sera, M. Matsumura, and T. Nishioka
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 233202-1-4
  • Peer Reviewed
• [Journal Article] Pressure-Induced Antiferroquadrupole Order in CeTe (2011)
  • Author(s): Y. Kawarazaki, T. Matsumura, M. Sera and A. Ochiai
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 023713-1-4
  • Peer Reviewed
• [Journal Article] High-field magnetization and magnetic phase transition in CeOs_2Al_<10> (2011)
  • Author(s): A. Kondo, J. Wang, K. Kindo, Y. Ogane, Y. Kawamura, S. Tanimoto, T. Nishioka, D. Tanaka, H. Tanida, and M. Sera
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 180415(R)-1-4
  • Peer Reviewed
• [Journal Article] Motion of guest ions as precursor to first-order phase transition in the cage system GdB_6 (2011)
  • Author(s): K. Iwasa, R. Igarashi, K. Saito, C. Laulhe, T. Orihara, S. Kunii, K. Kuwahara, H. Nakao, Y. Murakami, F. Iga, M. Sera, S. Tsutsui, H. Uchiyama, and A. Q. Baron
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 214308-1-6
  • Peer Reviewed
• [Journal Article] ^<27> Al NMR Study on CeRu_2Al_<10> Single Crystal : I. Determination of the NQR Parameters for Five Non-Equivalent Al Sites in the Paramagnetic Region (2011)
  • Author(s): H. Tanida, D. Tanaka, M. Sera, T. Nishioka, H. Kato, M. Matsumura, H. Harima, and H. Yasuoka
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 013708-1-4
  • Peer Reviewed
• [Journal Article] Magnetization and Magnetoresistance of CeRu_2Al_<10> under High Magnetic Field along c-Axis (2011)
  • Author(s): A. Kondo, J. Wang, K. Kindo, T. Takesaka, Y. Ogane, Y. Kawamura, T. Nishioka, D. Tanaka, H. Tanida and M. Sera
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 013701-1-4
  • Peer Reviewed
• [Journal Article] Reconciliation between NQR Spectrum and Long-Range Order in CeRu_2Al_<10> (2011)
  • Author(s): M. Matsumura, H. Tanida, D. Tanaka, H. Kato, T. Nishioka, and M. Sera
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: 085001-1-4
  • Peer Reviewed
• [Journal Article] Existence Region of Phase III' in CeB_6 (2011)
  • Author(s): K. Kunimori, M. Koani, F. Funaki, H. Tanida, M. Sera, T. Matsumura and F. Iga
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SA056-1-3
  • Peer Reviewed
• [Journal Article] Pressure Effect of Ce_<0. 75> La_<0. 25> B_6 (2011)
  • Author(s): K. Kunimori, H. Tanida, T. Matsumura, M. Seraand F. Iga
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SA055-1-3
  • Peer Reviewed
• [Journal Article] Anomalous Magnetic Phase Diagram of CeRu_2Al_10 (2011)
  • Author(s): H. Tanida, D. Tanaka, M. Sera, T. Nishioka and M. Matsumura
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SA042-1-3
  • Peer Reviewed
• [Journal Article] Anomalous Magnetic Phase Diagram of CeRu_2Al_<10> (2011)
  • Author(s): D. Tanaka, H. Tanida, M. Sera, T. Nishioka and M. Matsumura
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SA047-1-3
  • Peer Reviewed
• [Journal Article] High-Field Magnetization and Magnetoresistance of CeRu_2Al_<10> (2011)
  • Author(s): A. Kondo, J. Wang, K. Kondo, Y. Ogane, T. Takesaka, Y. Kawamura, T. Nishioka, D. Tanaka, H. Tanida and M. Sera
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SA047-1-3
  • Peer Reviewed
• [Journal Article] Hall coefficient forCeRu_2Al_10 under pressure (2011)
  • Author(s): K. Kawamura, Y. Ogane, T. Nishioka, H. Kato, M. Matsumura, D. Tanaka, H. Tanida, M. Sera, A. Kondo, K. Matsubayashi and Y. Uwatoko
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SA046-1-3
  • Peer Reviewed
• [Journal Article] Magnetic Phase Diagram of Ce_<1-x> Gd_xRu_2Al_<10> Single Crystals (2011)
  • Author(s): R. Kobayashi, Y. Kawamura, T. Nishioka, H. Kato, M. Matsumura, K. Kodama, H. Tanida, M. Sera, K. Matsubayashi and Y. Uwatoko
  • Journal Title: J. Phys. Soc. Jon Volume: 80 Pages: SA044-1-3
  • Peer Reviewed
• [Journal Article] Neutron scattering of the long-range ordered state in CeRu_2Al_<10> (2011)
  • Author(s): J-M. Mignot, J. Robert, G. Andre, M. Bataille, T. Nishioka, R. Kobayashi, M. Matsumura, H. Tanida, D. Tanaka and M. Sera
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SA022-1-3
  • Peer Reviewed
• [Journal Article] Behavior of the Antiferroquadrupolar Moments in the Antiferromagnetic Ordered Phase ofCeB_6 (2011)
  • Author(s): T. Matsumura, T. Yonemura, K. Kunimori, M. Seraand F. Iga
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SSA054-1-3
  • Peer Reviewed
• [Journal Article] Long-range order and low-energy magnetic excitation in CeRu_2Al_<10> studied via neutron scattering (2010)
  • Author(s): Robert, J-M. Mignot, Gilles Andre, T. Nishioka, R. Kobayashi, M. Matsumura, H. Tanida, D. Tanaka, and M. Sera
  • Journal Title: Phys. Rev. B Volume: 80 Pages: 100404(R)-1-4
  • Peer Reviewed
• [Journal Article] Existence of Fine Structure inside Spin Gap in CeRu_2Al_<10> (2010)
  • Author(s): H. Tanida, D. Tanaka, M. Sera, C. Moriyoshi, Y. Kuroiwa, T. Takesaka, T. Nishioka, H. Katoand M. Matsumura
  • Journal Title: J. Phys. Soc. Jpn Volume: 79 Pages: 08371-1-4
  • Peer Reviewed
• [Journal Article] High-Field Magnetization of CeRu_2Al_<10> (2010)
  • Author(s): A. Kondo, J. Wang, K. Kindo, T. Takesaka, Y. Kawamura, T. Nishioka, D. Tanaka, H. Tanidaand M. Sera
  • Journal Title: J. Phys. Soc. Jpn Volume: 79 Pages: 073709-1-4
  • Peer Reviewed
• [Journal Article] Stable Existence of Phase IV inside Phase II under Pressure in Ce_<0. 8> La_<0. 2> B_6 (2010)
  • Author(s): K. Kunimori, H. Tanida, T. Matsumura, M. Sera and F. Iga
  • Journal Title: J. Phys. Soc. Jpn Volume: 79 Pages: 073703-1-4
  • Peer Reviewed
• [Journal Article] Anisotropic Transport Properties of CeRu_2Al_<10> (2010)
  • Author(s): H. Tanida, D. Tanaka, M. Sera, C. Moriyoshi, Y. Kuroiwa, T. Takesaka, T. Nishioka, H. Katoand M. Matsumura
  • Journal Title: J. Phys. Soc. Jpn Volume: 79 Pages: 063709-1-4
  • Peer Reviewed
• [Journal Article] Possible Long-Range Order with Singlet Ground State in CeRu_2Al_<10> (2010)
  • Author(s): H. Tanida, D. Tanaka, M. Sera, C. Moriyoshi, Y. Kuroiwa, T. Takesaka, T. Nishioka, H. Kato, and M. Matsumura
  • Journal Title: J. Phys. Soc. Jpn Volume: 79 Pages: 043708-1-4
  • Peer Reviewed
• [Journal Article] Magnetic Field Induced 4f Octupole in CeB_6 Probed by Resonant X-ray Diffraction (2009)
  • Author(s): T. Matsumura, T. Yonemura, K. Kunimori, M. Seraand F. Iga
  • Journal Title: Phys. Rev. Lett Volume: 103 Pages: 017203-1-4
  • Peer Reviewed
• [Journal Article] Effect of Nd substitution on the magnetic order in Ce_xNd1_<-x> B_6 solid solutions (2009)
  • Author(s): J.-M. Mignot, J. Robert, G. Andre, M. Sera and F. Iga
  • Journal Title: Phys. Rev. B Volume: 79 Pages: 22426-1-7
  • Peer Reviewed
• [Journal Article] Stabilization of Phase IV in Ce_xLa1_<-x> B6(x=0. 4, 0. 5) by Pr and Nd Ion Dopings (2009)
  • Author(s): A. Kondo, T. Taniguchi, H. Tanida, T. Matsumura, M. Sera, F. Iga, H. Tou, T. Sakakibara, S. Kunii
  • Journal Title: J. Phys. Soc. Jpn Volume: 78 Pages: 093708-1-4
  • Peer Reviewed
• [Presentation] LnT_2Al_<10>の結晶構造と電子密度分布 (2012)
  • Author(s): 世良正文, 田中大貴, 谷田博司, 小川真由子, 森吉千佳子, 黒岩芳弘, 西岡孝, 松村政博, 金延恩, 辻成希, 高田昌樹
  • Organizer: 日本物理学会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-27
• [Presentation] LnT_2Al_<10>における軌道-格子相互作用について (2012)
  • Author(s): 世良正文, 田中大貴, 谷田博司, 小川真由子, 森吉千佳子, 黒岩芳弘, 西岡孝, 松村政博, 金延恩, 辻成希, 高田昌
  • Organizer: 日本物理学会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-27
• [Presentation] LnT_2Al_<10>の電子密度分布 (2011)
  • Author(s): 世良正文, 田中大貴, 谷田博司, 小川真由子, 森吉千佳子, 黒岩芳弘, 西岡孝, 松村政博, 金延恩, 辻成希, 高田昌
  • Organizer: 日本物理学会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-21
• [Presentation] LnT_2Al_<10>における軌道-格子相互作用について (2011)
  • Author(s): 世良正文, 田中大貴, 谷田博司, 小川真由子, 森吉千佳子, 黒岩芳弘, 西岡孝, 松村政博, 金延恩, 辻成希, 高田昌
  • Organizer: 日本物理学会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-21
• [Presentation] CeB_6における圧力誘起新奇秩序相 (2011)
  • Author(s): 世良正文, 国森啓介, 谷田博司, 松村武, 伊賀文俊
  • Organizer: 日本物理学会
  • Place of Presentation: 岡山大学
  • Year and Date: 2011-03-21