2002 年 71 巻 3 号 p. 845-851
We succeeded in growing a high-quality single crystal of an antiferromagnet UPtGa5 by the self-flux method, and measured the magnetic susceptibility, electrical resistivity, specific heat and de Haas-van Alphen (dHvA) oscillation. We found an antiferromagnetic transition at 26 K from the magnetic susceptibility and electrical resistivity measurements. Six dHvA branches were observed, ranging from 1.14 × 107 to 1.13 × 108 Oe. Fermi surfaces consist of two nearly cylindrical and two spherical Fermi surfaces. The cyclotron mass is large, ranging from 10 to 24 m0, which is consistent with the electronic specific heat coefficient γ=57 mJ/K2·mol.
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