Publication Date:
2015-03-27
Description:
The spin and orbital magnetic moments of the Fe 3 O 4 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 Fe 3 O 4 . 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 Fe 3 O 4 /MgO interface. Such sizable orbital moment will add capacities to the Fe 3 O 4 -based spintronics devices in the magnetization reversal by the electric field.
Print ISSN:
0021-8979
Electronic ISSN:
1089-7550
Topics:
Physics
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