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Heavy fermion state in YbIr$$_2$$Zn$$_{20}$$

Yoshiuchi, Shingo*; Toda, Masatoshi*; Matsushita, Masaki*; Yasui, Shinichi*; Hirose, Yusuke*; Oya, Masahiro*; Katayama, Keisuke*; Honda, Fuminori*; Sugiyama, Kiyohiro*; Hagiwara, Masayuki*; Kindo, Koichi*; Takeuchi, Tetsuya*; Yamamoto, Etsuji ; Haga, Yoshinori ; Settai, Rikio*; Tanaka, Toshiki*; Kubo, Yasunori*; Onuki, Yoshichika

High-field magnetization and de Haas-van Alphen effect were measured on a heavy fermion compound YbIr$$_2$$Zn$$_{20}$$. Large cyclotron masses ranging from 4 to 27 $$m_0$$ were detected in the dHvA experiment, and are found to be reduced at magnetic fields higher than 120 kOe. From the present experimental results together with the 4f-itinerant band calculations, the 4f electrons are considered to form heavy fermion state.

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Category:Physics, Multidisciplinary

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