Study of novelphase transition on the anisotropic Kondo semiconductor with caged structure

2012 Fiscal Year Final Research Report

• Project/Area Number: 23840033
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Toyama Prefectural University
• Principal Investigator: MURO Yuji 富山県立大学, 工学部教養教育, 准教授 (50385530)
• Project Period (FY): 2011 – 2012
• Keywords: 物性実験 / 近藤半導体 / 反強磁性 / 中性子散乱 / 元素置換効果

Research Abstract

Ternary Ce compounds CeT2Al10(T=Ru and Os) are new Kondo semiconductors which undergo an antiferromagnetic transition. The mechanism of the antiferromagnetic transition in CeT2Al10is expected to be different with typical Ce antiferromagnets because of extraordinary high transition temperature 27K for T=Ru and 28.5K for T=Os. In order to clarify the novel antiferromagnetic transition, we performed the study of neutron scattering, photoemission and substitution effect on T and Al. From this study, the magnetic transition in CeT2Al10should originate from unique electronic structure and the anisotropy of c-f hybridization.

Research Products

• [Journal Article] Crystal-field ground state of the orthorhombic Kondo insulator CeRu2Al10 (2012)
  • Author(s): F. Strigari, T. Willers, Y. Muro, K. Yutani, T.Takabatake, Z. Hu, Y.-Y. Chin, S. Agrestini, H. -J. Lin, C. T. Chen, A. Tanaka, M. W. Haverkort, L. H. Tjeng, A. Severing
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 4
  • DOI: 10.1103/PhysRevB.86.081105
  • Peer Reviewed
• [Journal Article] Fe substitution effect on the phase transition and hybridization gap in CeOs2Al10 (2012)
  • Author(s): Y. Mu r o, K. Yutani, J. Kajino, T. Takabatake
  • Journal Title: J. of Phys.: Conf. Series Volume: 391 Pages: 4
  • DOI: 10.1088/1742-6596/391/1/012049
  • Peer Reviewed
• [Journal Article] Optical study of charge instability in CeRu2Al10in comparison with CeOs2Al10and CeFe2Al10 (2011)
  • Author(s): S. Kimura, T. Iizuka, H. Miyazaki,, T. hajiri, M. Matsunami, T. Mori, A, Irizawa, Y. Muro, J. Kajino, T. Takabatake
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 4
  • DOI: 10.1103/PhysRevB.84.165125
  • Peer Reviewed
• [Presentation] 反強磁性近藤半導体CeRu2Al10のAlサイト置換効果 (2013)
  • Author(s): 室裕司, 飛弾和也, 福原忠, 湯谷圭亮,高畠敏郎
  • Organizer: 日本物理学会 第68回年次大会
  • Place of Presentation: 広島大学東広島キャンパス
  • Year and Date: 2013-03-27
• [Presentation] Anisotropic c-f hybridization in a Kondo semiconductor CeFe2Al10 (2012)
  • Author(s): Y. Mu r o, K. Yutani, J. Kajino, T. Takabatake
  • Organizer: The 19th International Conference on Magnetism
  • Place of Presentation: 釜山、韓国
  • Year and Date: 2012-07-09
• [Presentation] Fe substitution effect on the phase transition and hybridization gap in CeOs2Al10 (2011)
  • Author(s): Y. Mu r o, K. Yutani, J. Kajino, T. Takabatake
  • Organizer: International Conference on StronglyCorrelated Electron Systems 2011
  • Place of Presentation: ケンブリッジ、イギリス
  • Year and Date: 2011-08-30