Open AccessSpin and orbital magnetic moments of molecular beam epitaxy γ′-Fe4N films on LaAlO3(001) and MgO(001) substrates by x-ray magnetic circular dichroism
Author(s) -
Keita Ito,
G. H. Lee,
Kohei Harada,
Mitsushi Suzuno,
Takashi Suemasu,
Yukiharu Takeda,
Y. Saitoh,
M. Ye,
A. Kimura,
Hiroyuki Akinaga
Publication year - 2011
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.3564887
Subject(s) - magnetic circular dichroism , molecular beam epitaxy , magnetic moment , x ray magnetic circular dichroism , materials science , epitaxy , condensed matter physics , ferromagnetism , spin (aerodynamics) , lattice constant , nuclear magnetic resonance , nanotechnology , optics , physics , spectral line , layer (electronics) , astronomy , thermodynamics , diffraction
10-nm-thick γ′-Fe4N films were grown epitaxially on LaAlO3(001) and MgO(001) substrates by molecular beam epitaxy using solid Fe and a radio-frequency NH3 plasma. The lattice mismatch of these substrates to γ′-Fe4N is 0% and 11%, respectively. Spin and orbital magnetic moments of these γ′-Fe4N epitaxial films were deduced by x-ray magnetic circular dichroism measurements at 300 K. The total magnetic moments are almost the same for the two substrates, that is, 2.44±0.06 μB and 2.47±0.06 μB, respectively. These values are very close to those predicted theoretically, and distinctively larger than that for α-Fe
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