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X-ray magnetic circular dichroism for Co$$_{x}$$Fe$$_{4-x}$$N (x = 0, 3, 4) films grown by molecular beam epitaxy

分子線エピタキシャル法で製作したCo$$_{x}$$Fe$$_{4-x}$$N (x = 0, 3, 4)薄膜試料の内殻吸収磁気円二色性による研究

伊藤 啓太*; 佐内 辰徳*; 安富 陽子*; Zhu, S.-Y.*; 都甲 薫*; 竹田 幸治; 斎藤 祐児; 木村 昭夫*; 末益 崇*

Ito, Keita*; Sanai, Tatsunori*; Yasutomi, Yoko*; Zhu, S.-Y.*; Toko, Kaoru*; Takeda, Yukiharu; Saito, Yuji; Kimura, Akio*; Suemasu, Takashi*

We evaluated orbital ($$m_{rm orb}$$) and spin magnetic moments ($$m_{rm spin}$$) of Co$$_{x}$$Fe$$_{4-x}$$N (x = 0, 3, 4) epitaxial thin films grown by molecular beam epitaxy using X-ray magnetic circular dichroism, and discussed the dependence of these values on x. Site-averaged $$m_{rm spin}$$ value of Fe atoms was deduced to be 1.91 $$mu$$$$_{B}$$ per atom, and that of Co atoms to be 1.47 $$mu$$$$_{B}$$ per atom in Co$$_{3}$$FeN at 300 K. These values are close to 1.87 $$mu$$$$_{B}$$ per Fe atom in Fe$$_{4}$$N and 1.43 $$mu$$$$_{B}$$ per Co atom in Co$$_{4}$$N, respectively. This result implies that the Fe and Co atoms in the Co$$_{3}$$FeN films were located both at corner and face-centered sites in the anti-perovskite lattice. Spin magnetic moments per unit cell were decreased linearly with increasing x in Co$$_{x}$$Fe$$_{4-x}$$N. This tendency is in good agreement with theory predicted by the first-principle calculation.

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パーセンタイル:35.07

分野:Physics, Applied

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