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

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 $_{B}$ per atom, and that of Co atoms to be 1.47 $_{B}$ per atom in Co $_{3}$ FeN at 300 K. These values are close to 1.87 $_{B}$ per Fe atom in Fe $_{4}$ N and 1.43 $_{B}$ 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.

Language	:	English
Journal	:	Journal of Applied Physics
Volume	:	115
Number	:	17
Pages	:	p.17C712_1 - 17C712_3
Publication Year/Month	:	2014/05
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Paper URL	:	https://doi.org/10.1063/1.4862517
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Keywords	:	no keyword
Research Facility	:	SPring-8(大型放射光施設)
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Registration No. : AA20150435
JAEA Abstracts No. : 44000705
Paper Submission No. : 17320

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X-ray magnetic circular dichroism for CoFeN (x = 0, 3, 4) films grown by molecular beam epitaxy

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