Antiferroquadrupolar Ordering in the Pseudo-Binary Tetragonal Compounds Ho_<1-X>DY_X B_2 C_2

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Author(s)

Abstract

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.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 70(6), 1705-1714, 2001-06-15

    The Physical Society of Japan (JPS)

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Codes

  • NII Article ID (NAID)
    110001979056
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00319015
  • NDL Article ID
    5830269
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  NDL  NII-ELS 
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