Structural characterization and magnetic behavior of uranium compound UPtAl

ウラン化合物UPtAlの結晶構造解析と磁気特性

芳賀 芳範   ; 菅井 孝志*; 松本 裕司*; 山本 悦嗣  

Haga, Yoshinori; Sugai, Takashi*; Matsumoto, Yuji*; Yamamoto, Etsuji

Crystal structure and magnetic property of UPtAl is investigated. A single crystal X-ray diffraction experiment identified the hexagonal unit cell with a disordered structure in the uranium containing layer. A series of superstructure reflections were found. They are successfully indexed as (/3 /3 0), however, with a streak along the direction. A layered structure model containing honeycomb arrangement of uranium atoms is proposed. Preliminary magnetization measurements on a polycrystalline sample are also presented.