Magnetic phase diagrams of Dy 0.8Gd 0.2B 2C 2 with the antiferroquadrupolar ordering in the antiferromagnetic phase

Eiichi Matsuoka, Shoei Ogushi, Yuta Sasaki, Masato Sakata, Kenji Ohoyama, Hideya Onodera

Research output: Contribution to journalArticlepeer-review

Abstract

Gd substitution for Dy in DyB 2C 2 that undergoes an antiferroquadrupolar (AFQ) ordering at T Q = 24:7K and an antiferromagnetic (AFM) one at T N = 15:3K enhances the AFM interaction and weakens the AFQ interaction. In Dy 0.8Gd 0.2B 2C 2, the AFQ transition occurs at T Q = 17:6K below the AFM one at T N = 19:0 K. However, the strong competition between the AFQ and AFM interactions supresses the development of the AFQ order parameter below T Q and causes an anomalous behavior in field-induced transitions. The magnetic phase diagrams of Dy 0.8Gd 0.2B 2C 2 drawn from the experimental results of specific heat and magnetization have anomalous phase boundaries originating from this competition.

Original languageEnglish
Article number034724
Journaljournal of the physical society of japan
Volume78
Issue number3
DOIs
Publication statusPublished - 2009 Mar
Externally publishedYes

Keywords

  • Antiferromagnetic transition
  • Antiferroquadrupolar transition
  • DyB C
  • Gd dilution
  • Phase diagram

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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