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X-ray magnetic circular dichroism study of epitaxial magnetite ultrathin film on MgO(100)
Authors:
W. Q.
Liu
(York-Nanjing Joint Center for Spintronics and Nano Engineering)
,
M. Y.
Song
(National Taiwan University)
,
N. J.
Maltby
(University of York)
,
S. P.
Li
(University of York)
,
J. G.
Lin
(National Taiwan University)
,
M. G.
Samant
(Almaden Research Centre)
,
S. S. P.
Parkin
(Almaden Research Centre)
,
P.
Bencok
(Diamond Light Source)
,
P.
Steadman
(Diamond Light Source)
,
A
Dobrynin
(Diamond Light Source)
,
Y. B.
Xu
(Nanjing University)
,
R.
Zhang
(Nanjing University)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Journal Of Applied Physics
, VOL 117
State:
Published (Approved)
Published:
May 2015
Abstract: The spin and orbital magnetic moments of the Fe3O4 epitaxial ultrathin film synthesized by plasma assisted simultaneous oxidization on MgO(100) have been studied with X-ray magnetic circular dichroism. The ultrathin film retains a rather large total magnetic moment, i.e., (2.73 ± 0.15) μ B/f.u., which is ∼70% of that for the bulk-like Fe3O4. A significant unquenched orbital moment up to 0.54 ± 0.05 μ B/f.u. was observed, which could come from the symmetry breaking at the Fe3O4/MgO interface. Such sizable orbital moment will add capacities to the Fe3O4-based spintronics devices in the magnetization reversal by the electric field.
Journal Keywords: Crystal Structure; Electric Fields; Epitaxy; Ferrites; Interfaces; Iron Oxides; Magnesium Oxides; Magnetic Circular Dichroism; Magnetic Moments; Magnetite; Magnetization; Spin; Symmetry Breaking; Thin Films; X Radiation
Subject Areas:
Physics
Instruments:
I10-Beamline for Advanced Dichroism