Low-temperature magnetic orderings and Fermi surface properties of LaCd, CeCd, and PrCd with a caged crystal structure

カゴ状構造をもつLaCd, CeCd及びPrCdの磁気秩序とフェルミ面

吉内 伸吾*; 竹内 徹也*; 大家 政洋*; 片山 敬亮*; 松下 昌輝*; 吉谷 尚久*; 西村 尚人*; 太田 尚志*; 立岩 尚之   ; 山本 悦嗣  ; 芳賀 芳範   ; 山上 浩志*; 本多 史憲*; 摂待 力生*; 大貫 惇睦

Yoshiuchi, Shingo*; Takeuchi, Tetsuya*; Oya, Masahiro*; Katayama, Keisuke*; Matsushita, Masaki*; Yoshitani, Naohisa*; Nishimura, Naoto*; Ota, Hisashi*; Tateiwa, Naoyuki; Yamamoto, Etsuji; Haga, Yoshinori; Yamagami, Hiroshi*; Honda, Fuminori*; Settai, Rikio*; Onuki, Yoshichika

We succeeded in growing single crystals of cage-structure compounds RCd (R: La, Ce, and Pr) and precisely studied their low-temperature magnetic and electronic properties. We found antiferromagnetic ordering at 0.44 and 0.39 K in CeCd and PrCd, respectively, and clarified the magnetic phase diagrams of the compounds. From the dHvA experiment, we detected small dHvA branches ranging from 710 to 210 Oe, which correspond to small Fermi surfaces. This is mainly due to a small Brillouin zone based on a large unit cell. Moreover, the dHvA frequencies and cyclotron masses are approximately the same among RCd, revealing a localized character of 4f electrons in CeCd and PrCd.