Antiferroquadrupolar Ordering in the Pseudo-Binary Tetragonal Compounds Ho_<1-x>Dy_xB_2C_2 : Condensed Matter: Electronic Properties, etc.

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概要

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• Antiferroquadrupolar (AFQ) and antiferromagnetic (AFM) transitions in Ho_<1-x>DyB_2C_2 (O ≤ x ≤ 1.0) have been investigated on the single-crystalline samples by magnetization and specific heat measurements. As the Dy concentration increases, the both transition temperatures increases from T_Q = 4.5K and T_N = 5.9K for x = O to T_Q = 24.7K and T_N = 15.3K for x = 1. For x = 0.2 and 0.3, there appears a single transition at which the AFQ and AFM transitions occur simultaneously. For 0.4 ≤ x, the two transition temperatures are reversed. The temperature dependence of specific heat is interpreted well by assuming that the entropy of Rln3 is released through the successive transitions in HoB_2C_2, that is, the 4f ground state of Ho^<3+>+ ion is a quasi-triplet. It is supposed that the Ho^<3+>+ ion has a rather small quadrupolar moment compared with the Dy^<3+> quadrupole.

• 社団法人日本物理学会の論文
• 2001-06-15

著者

• OHOYAMA Kenji

  Institute for Materials Research, Tohoku University

• Ohoyama K

  Institute For Materials Research Tohoku University

• Ohoyama Kenji

  Department Of Physics Faculty Of Science Tohoku University

• YAMAUCHI Hiroki

  Institute for Materials Research, Tohoku University

• TOBO Aya

  Department of Physics, Graduate School of Science, Tohoku University

• Tobo A

  Department Of Physics Graduate School Of Science Tohoku University

• Tobo Aya

  The Institute Of Physical And Chemical Research(riken)

• TOBO Aya

  Institute for Materials Research, Tohoku University

• YAMAGUCHI Yasuo

  Institute for Materials Research, Tohoku University

• ONODERA Hideya

  Institute for Materials Research, Tohoku University

• SHIMADA Hiroyuki

  Institute for Materials Research, Tohoku University

• Ohyama Kenji

  Imr Tohoku University

• Yamaguchi Y

  Tohoku Univ. Sendai

• Yamaguchi Y

  Kumamoto Techno Res. Park Kumamoto Jpn

• Yamauchi H

  Istec Tokyo Jpn

• Yamauchi H

  Superconductivity Research Laboratory Istec

• Yamauchi Hisao

  Superconductivity Research Laboratory Istec:(present Address)research Laboratory Of Engineering Mate

• Tobo Aya

  Institute For Materials Research Tohoku University

• Onodera Hideya

  Institute For Materials Research

• Oikawa K

  Inst. Materials Structure Sci. Ibaraki

• Yamamoto H

  The Research Institute For Iron Steel And Other Metals

• Yamamoto Hisao

  The Research Institute For Iron Steel And Other Metals

• Yamaguchi Yasuo

  Institute For Materials Research Tohoku University

• Yamauchi H

  Institute For Materials Research Tohoku University:(present Office)neutron Science Research Center

• Yamaguchi Y

  Central Workshop Osaka University

• Yamauchi Hiroki

  Institute For Materials Research Tohoku University:(present Office)neutron Science Research Center

• Yamamoto H

  Department Of Energy Engineering And Science Nagoya University

• Ohoyama Kenji

  Institute For Materials Of Physics Tohoku University

• Yamamoto H

  Univ. Tokyo Tokyo

• Yamamoto Hiroshi

  Department Of Energy Engineering And Science Nagoya University

• Shimada Hiroyuki

  Institute For Materials Research Tohoku University

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