Magnetic Phase Diagrams with Possible Field-induced Antiferroquadrupolar Order in TbB$_2$C$_2$

Koji Kaneko; Hideya Onodera; Hiroki Yamauchi; Takuo Sakon; Mitsuhiro Motokawa; Yasuo Yamaguchi

doi:10.1103/PhysRevB.68.012401

Magnetic Phase Diagrams with Possible Field-induced Antiferroquadrupolar Order in TbB$_2$C$_2$

Strongly Correlated Electrons 2009-11-07 v1

Authors: Koji Kaneko , Hideya Onodera , Hiroki Yamauchi , Takuo Sakon , Mitsuhiro Motokawa , Yasuo Yamaguchi

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Abstract

Magnetic phase diagrams of a tetragonal antiferromagnet TbB $_2$ C $_2$ were clarified by temperature and field dependence of magnetization. It is noticeable that the N{\'e}el temperature in TbB $_2$ C $_2$ is anomalously enhanced with magnetic fields, in particular the enhancement reaches 13.5 K for the ${<}1 1 0{>}$ direction at 10 T. The magnetization processes as well as the phase diagrams are well interpreted assuming that there appear field-induced antiferroquadrupolar ordered phases in TbB $_2$ C $_2$ . The phase diagrams of the AFQ compounds in RB $_2$ C $_2$ are systematically understood in terms of the competition with AFQ and AFM interactions.

Keywords

magnetic phase diagram antiferroquadrupolar order TbB$_2$C$_2$ field-induced order Néel temperature

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@article{arxiv.cond-mat/0212082,
  title  = {Magnetic Phase Diagrams with Possible Field-induced Antiferroquadrupolar Order in TbB$_2$C$_2$},
  author = {Koji Kaneko and Hideya Onodera and Hiroki Yamauchi and Takuo Sakon and Mitsuhiro Motokawa and Yasuo Yamaguchi},
  journal= {arXiv preprint arXiv:cond-mat/0212082},
  year   = {2009}
}

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4 pages, 4 figures, RevTeX4

Magnetic Phase Diagrams with Possible Field-induced Antiferroquadrupolar Order in TbB$_2$C$_2$

Abstract

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