Anisotropy in magnetic phase diagram of TbBC with field-induced antiferroquadrupolar order

磁場誘起反強四極子秩序化合物TbBCにおける磁気相図の異方性

井戸 海平*; 東方 綾*; 金子 耕士   ; 大山 研司*; 小野寺 秀也*

Ido, Kaihei*; Tobo, Aya*; Kaneko, Koji; Oyama, Kenji*; Onodera, Hideya*

磁場誘起反強四極子秩序を示すTbBCについて、磁気相図の印加磁場方向依存性を調べ、[100]と[110]の異方性を明らかにした。反強磁性と反強四極子秩序が共存する[100]の磁場誘起秩序相(III相)は、[110]のII'に連続的につながっているように見える。この結果は、III相とII'相の磁気構造が類似もしくは同じであることを示唆している。

The field-direction dependence of the magnetic phase diagram was examined for the compound TbBC with field-induced antiferroquadrupolar-ordering, in order to elucidate anisotropy in the magnetic phase diagrams for [100] and [110]. The field-induced phase for [100] (phase III), which is a phase in which antiferromagnetic (AFM) and antiferroquadrupolar (AFQ) orders coexist, seems to change continuously into the other (AFQAFM) phase (phase II') for [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.