Open AccessX-ray magnetic circular dichroism for CoxFe4−xN (x = 0, 3, 4) films grown by molecular beam epitaxy
Author(s) -
Keita Ito,
Tatsunori Sanai,
Yoko Yasutomi,
Siyuan Zhu,
Kaoru Toko,
Yukiharu Takeda,
Y. Saitoh,
A. Kimura,
Takashi Suemasu
Publication year - 2014
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.4862517
Subject(s) - magnetic moment , magnetic circular dichroism , atom (system on chip) , molecular beam epitaxy , crystallography , ferromagnetism , epitaxy , atomic physics , chemistry , materials science , condensed matter physics , physics , spectral line , nanotechnology , layer (electronics) , astronomy , computer science , embedded system
We evaluated orbital (m orb) and spin magnetic moments (m spin) of Co x Fe4− 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 spin value of Fe atoms was deduced to be 1.91 μ B per atom, and that of Co atoms to be 1.47 μ B per atom in Co3FeN at 300 K. These values are close to 1.87 μ B per Fe atom in Fe4N and 1.43 μ B per Co atom in Co4N, respectively. This result implies that the Fe and Co atoms in the Co3FeN 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 Fe4− x N. This tendency is in good agreement with theory predicted by the first-principle calculation
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