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

Abstract

Nanoscale Fe3O4 epitaxial thin film has been synthesized on MgO/GaAs(100) spintronic heterostructure, and studied with X-ray magnetic circular dichroism (XMCD). We have observed a total magnetic moment of (3.32 +- 0.1) uB/f.u., retaining 83% of the bulk value. Unquenched orbital moment of (0.47 +- 0.05) uB/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.

arXiv commentarXiv admin note: substantial text overlap with arXiv:1501.01803

References in corpus (3)

• Observation of the spin Seebeck effect in epitaxial Fe3O4 thin films
• Vanishing Fe 3d orbital moments in single-crystalline magnetite
• Spin moment over 10-300 K and delocalization of magnetic electrons above the Verwey transition in magnetite

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• X-ray magnetic circular dichroism study of epitaxial magnetite ultrathin film on MgO (100)
• Elementary specific spin and orbital moments of ultrathin CoFeB amorphous films on GaAs(100)