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

We evaluated orbital (m{sub orb}) and spin magnetic moments (m{sub spin}) of Co{sub x}Fe{sub 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{sub spin} value of Fe atoms was deduced to be 1.91 μ{sub B} per atom, and that of Co atoms to be 1.47 μ{sub B} per atom in Co{sub 3}FeN at 300 K. These values are close to 1.87 μ{sub B} per Fe atom in Fe{sub 4}N and 1.43 μ{sub B} per Co atom in Co{sub 4}N, respectively. This result implies that the Fe and Co atoms in the Co{sub 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{sub x}Fe{sub 4−x}N. This tendency is in good agreement with theory predicted by the first-principle calculation.
Authors:
; ; ; ;  [1] ; ;  [2] ; ;  [3]
  1. Institute of Applied Physics, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573 (Japan)
  2. Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526 (Japan)
  3. Condensed Matter Science Division, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo-cho, Hyogo 679-5148 (Japan)
Publication Date:
OSTI Identifier:
22273880
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COBALT COMPOUNDS; CONCENTRATION RATIO; FCC LATTICES; IRON NITRIDES; MAGNETIC CIRCULAR DICHROISM; MAGNETIC MOMENTS; MOLECULAR BEAM EPITAXY; SPIN; THIN FILMS; X RADIATION