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Spin and orbital moments of nanoscale Fe3O4 epitaxial thin film on MgO/GaAs(100)

DOI: 10.1063/1.4871001 DOI Help

Authors: Wenqing Liu (York-Nanjing Joint Center for Spintronics and Nano Engineering) , Y. B. Xu (Nanjing University) , Ping Kwan Johnny Wong (University of York) , N. Maltby (University of York) , S. P. Li (University of York) , X. F. Wang (Nanjing University) , J. Du (Nanjing University) , B. You (Nanjing University) , J. Wu (University of York) , P. Bencok (Diamond Light Source) , R. Zhang (Nanjing University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Applied Physics Letters , VOL 104

State: Published (Approved)
Published: April 2014

Abstract: Nanoscale Fe3O4 epitaxial thin film has been synthesized on MgO/GaAs(100) spintronic heterostructure, and studied with X-ray magnetic circular dichroism. We have observed a total magnetic moment (ml+s ) of (3.32 ± 0.1)μB/f.u., retaining 83% of the bulk value. Unquenched orbital moment (ml ) of (0.47 ± 0.05)μB/f.u. has been confirmed by carefully applying the sum rule. The results offer direct experimental evidence of the bulk-like total magnetic moment and a large orbital moment in the nanoscale fully epitaxial Fe3O4/MgO/GaAs(100) heterostructure, which is significant for spintronics applications.

Journal Keywords: Epitaxy; Ferrites; Gallium Arsenides; Iron Oxides; Magnesium Oxides; Magnetic Circular Dichroism; Magnetic Moments; Nanostructures; Spin; Thin Films; X Radiation

Subject Areas: Physics

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