Antiferroquadrupolar ordering and magnetic properties of the tetragonal DyB2C2 compound

Hiroki Yamauchi, Hideya Onodera, Kenji Ohoyama, Takahiro Onimaru, Masashi Kosaka, Masayoshi Ohashi, Yasuo Yamaguchi

Research output: Contribution to journalArticlepeer-review

162 Citations (Scopus)

Abstract

Magnetic properties were investigated on a single-crystalline DyB2C2 compound with the tetragonal structure. Spontaneous magnetizations appear along the a- and [1 1 0]-directions below TC = 15.3 K. A very small shoulder is observed only along the c-axis at TQ = 24.7 K, although large λ-type anomalous specific heats are observed at TC and TQ. There exists a large magnetic anisotropy in the tetragonal basal plane which is observed in magnetization processes below TC. Neutron powder diffraction experiments reveal that magnetic reflections are observed only below TC. In the magnetically ordered phase, the Dy moments are arranged to be perpendicular to neighbors along the c-axis. The results are well interpreted by postulating that the phase between TC and TQ is an antiferroquadrupolar ordered one. DyB2C2 is a novel compound with a high antiferroquadrupolar ordering temperature of 24.7 K.

Original languageEnglish
Pages (from-to)2057-2066
Number of pages10
Journaljournal of the physical society of japan
Volume68
Issue number6
DOIs
Publication statusPublished - 1999 Jan 1

Keywords

  • Antiferroquadrupolar ordering
  • DyBC
  • Magnetic anisotropy
  • Magnetic phase diagram
  • Magnetization
  • Neutron diffraction
  • Specific heat

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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