Antiferromagnetic ordering and chiral crystal structure transformation in NdRhSn

NdRhSnにおける反強磁性秩序とカイラル結晶構造転移

下田 愛海*; 岩佐 和晃*; 桑原 慶太郎*; 佐賀山 基*; 中尾 裕則*; 石角 元志*; 中尾 朗子*; 河村 聖子   ; 村井 直樹  ; 大原 高志   ; 南部 雄亮*

Shimoda, Ami*; Iwasa, Kazuaki*; Kuwahara, Keitaro*; Sagayama, Hajime*; Nakao, Hironori*; Ishikado, Motoyuki*; Nakao, Akiko*; Kawamura, Seiko; Murai, Naoki; Ohara, Takashi; Nambu, Yusuke*

The detailed electronic superlattice structure of the Remeika phase compound NdRhSn was investigated. The material undergoes a structural phase transition at ~K between the high temperature phase () and the low temperature chiral structure phase (3), which is the same symmetry change as that of the La- and Ce-based Remeika phase compounds. The inequivalent Nd-ion sites in the chiral phase are occupied by different crystalline electronic field splitting schemes of the 4 electronic configuration with the total angular moment , which results in two-sublattice antiferromagnetic ordering below = 1.65 K. The one-dimensional Nd-ion chains in which the magnetic moments are alternately arranged are connected via the second-neighbor triangular lattice in the chiral phase, which suggests a magnetic frustration effect.