Broken C $_{4}$ symmetry in the tetragonal state of uniaxial strained BaCo $_{0.9}$ Ni $_{0.1}$ S $_{1.9}$

一軸ひずみBaCo $_{0.9}$ Ni $_{0.1}$ S $_{1.9}$ の正方晶状態での4回対称性の破れ

Shamoto, Shinichi; Yamauchi, Hiroki; Ikeuchi, Kazuhiko*; Kajimoto, Ryoichi; Ieda, Junichi

A compound with large anions is known to show large compressibility whereby a novel response may emerge from the degenerated state by a uniaxial pressure. Neutron scattering study of BaCo $_{0.9}$ Ni $_{0.1}$ S $_{1.9}$ crystal reveals that the tetragonal insulating state has two magnetic domains with in-plane anisotropic antiferromagnetic wave vectors =(, 0) and =(0, ). One magnetic domain with becomes dominant under a weak uniaxial pressure of 1 MPa without a structural phase transition. Correspondingly, the in-plane broken C $_{4}$ symmetry is observed in the in-plane magnetic excitation. The domain-ratio changes under a uniaxial pressure in the tetragonal state is only slightly smaller than that in the orthorhombic state.

使用言語	:	English
掲載資料名	:	Physical Review Research (Internet)
巻	:	3
号	:	1
ページ数	:	p.013169_1 - 013169_9
発行年月	:	2021/02
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キーワード	:	中性子散乱; 反強磁性; 構造相転移

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論文URL	:	https://doi.org/10.1103/PhysRevResearch.3.013169
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登録番号 : AA20200670
抄録集掲載番号 : 49000438
論文投稿番号 : 23998

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Broken C symmetry in the tetragonal state of uniaxial strained BaCoNiS

一軸ひずみBaCoNiSの正方晶状態での4回対称性の破れ

Broken C $_{4}$ symmetry in the tetragonal state of uniaxial strained BaCo $_{0.9}$ Ni $_{0.1}$ S $_{1.9}$

一軸ひずみBaCo $_{0.9}$ Ni $_{0.1}$ S $_{1.9}$ の正方晶状態での4回対称性の破れ