Antiferroquadrupolar Ordering in the Pseudo-Binary Tetragonal Compounds Ho1 - XDyxB2C2

Hiroyuki Shimada, Hideya Onodera, Hiroki Yamauchi, Aya Tobo, Kenji Ohoyama, Yasuo Yamaguchi

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22 Citations (Scopus)

Abstract

Antiferroquadrupolar (AFQ) and antiferromagnetic (AFM) transitions in Ho1 - xDyxB2C2 (0 ≤ 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 TQ = 4.5 K and TN = 5.9 K for x = 0 to TQ = 24.7 K and TN = 15.3 K 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 Rln 3 is released through the successive transitions in HoB2C2, that is, the 4f ground state of Ho3+ ion is a quasi-triplet. It is supposed that the Ho3+ ion has a rather small quadrupolar moment compared with the Dy3+ quadrupole.

Original languageEnglish
Pages (from-to)1705-1714
Number of pages10
Journaljournal of the physical society of japan
Volume70
Issue number6
DOIs
Publication statusPublished - 2001 Jun 1

Keywords

  • Antiferromagnetic order
  • Antiferroquadrupolar order
  • DyBC
  • HoBC
  • Magnetic phase diagram
  • Magnetization
  • Specific heat
  • Transition temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Shimada, H., Onodera, H., Yamauchi, H., Tobo, A., Ohoyama, K., & Yamaguchi, Y. (2001). Antiferroquadrupolar Ordering in the Pseudo-Binary Tetragonal Compounds Ho1 - XDyxB2C2. journal of the physical society of japan, 70(6), 1705-1714. https://doi.org/10.1143/JPSJ.70.1705