Anisotropy in Magnetic Phase Diagram of TbB2C2 with Field-Induced Antiferroquadrupolar Order

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  • Ido Kaihei
    Institute for Materials Research, Tohoku University
  • Tobo Aya
    Department of Physics, Graduate School of Science, Tohoku University
  • Kaneko Koji
    Institute for Materials Research, Tohoku University
  • Ohoyama Kenji
    Institute for Materials Research, Tohoku University
  • Onodera Hideya
    Department of Physics, Graduate School of Science, Tohoku University

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  • Anisotropy in Magnetic Phase Diagram of TbB<sub>2</sub>C<sub>2</sub> with Field-Induced Antiferroquadrupolar Order

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The field-direction dependence of the magnetic phase diagram was examined for the compound TbB2C2 with field-induced antiferroquadrupolar-ordering, in order to elucidate anisotropy in the magnetic phase diagrams for H||[100] and H||[110]. The field-induced phase for H||[100] (phase III), which is a phase in which antiferromagnetic (AFM) and antiferroquadrupolar (AFQ) orders coexist, seems to change continuously into the other (AFQ + AFM) phase (phase II′) for H||[110]. The result implies that both III and II′ phases have some similarity in their magnetic structures or they are possibly the same as each other.

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