Soft X-ray magnetic circular dichroism study of uranium monochalcogenides at uranium absorption edges

ウランモノカルコゲナイドのウラン吸収端での軟X線吸収磁気円二色性測定

岡根 哲夫  ; 竹田 幸治   ; 岡本 淳*; 間宮 一敏*; 大河内 拓雄; 藤森 伸一   ; 斎藤 祐児  ; 山上 浩志; 藤森 淳; 落合 明*; 田中 新*

Okane, Tetsuo; Takeda, Yukiharu; Okamoto, Jun*; Mamiya, Kazutoshi*; Okochi, Takuo; Fujimori, Shinichi; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Ochiai, Akira*; Tanaka, Arata*

X-ray magnetic circular dichroism (XMCD) was measured for the ferromagnetic uranium monochalcogenides US and USe at U absorption edges in the soft X-ray region. The obtained XMCD signal of US was comparable to the XMCD signal obtained in previous studies. From the sum-rule analysis of XMCD data, it was shown that the estimated ratios of orbital magnetic moment to spin magnetic moment were almost the same for US and USe. The analysis of the XAS branching ratio indicated an increase in 5 electron occupation number from US to USe.