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Magnetic properties and heavy electronic states in the antiferromagnet NpPtGa$$_5$$

反強磁性体NpPtGa$$_5$$における磁性と重い電子状態

青木 大*; 芳賀 芳範   ; 本間 佳哉*; 塩川 佳伸*; 山本 悦嗣  ; 中村 彰夫; 摂待 力生*; 大貫 惇睦

Aoki, Dai*; Haga, Yoshinori; Homma, Yoshiya*; Shiokawa, Yoshinobu*; Yamamoto, Etsuji; Nakamura, Akio; Settai, Rikio*; Onuki, Yoshichika

We succeeded in growing a new neptunium compound NpPtGa$$_5$$ by the Ga-flux method. NpPtGa$$_5$$ orders antiferromagnetically below $$T_N = 26$$ K. A cylindrical Fermi surface was detected by the dHvA experiment in the antiferromagnetic state. The large cyclotron masses are consistent with the large electronic specific heat coefficient.

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パーセンタイル:37.31

分野:Physics, Multidisciplinary

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