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Low-temperature magnetic orderings and Fermi surface properties of LaCd$$_{11}$$, CeCd$$_{11}$$, and PrCd$$_{11}$$ with a caged crystal structure

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$$_{11}$$ (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$$_{11}$$ and PrCd$$_{11}$$, respectively, and clarified the magnetic phase diagrams of the compounds. From the dHvA experiment, we detected small dHvA branches ranging from 7$$times$$10$$^5$$ to 2$$times$$10$$^7$$ 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$$_{11}$$, revealing a localized character of 4f electrons in CeCd$$_{11}$$ and PrCd$$_{11}$$.

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Category:Physics, Multidisciplinary

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