Spin-resolved photoelectron spectroscopy of the MgO/Fe(110) system

Abstract

The surface structure and electronic properties of ultrathin MgO layers grown on epitaxial Fe(110) films were investigated at room temperature by means of electron diffraction, Auger electron spectroscopy, scanning tunneling microscopy, and spin-resolved photoelectron spectroscopy. The spin polarization at the Fermi level (EF) of the Fe(110) film decreases sharply with increasing thickness of the MgO layer. This behavior arises from the formation of a thin FeO layer at the MgO(111)/Fe(110) interface, as revealed by structural and spectroscopic investigations. The strong attenuation of the intrinsic spin polarization is qualitatively attributed to the scattering of spin-polarized electrons at the unoccupied d-orbitals of Fe2+.

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Correspondence to Y.S. Dedkov.

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PACS

68.35.-p; 68.55.-a; 73.20.r; 75.70.Cn; 79.60.-I

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Dedkov, Y., Fonin, M., Rüdiger, U. et al. Spin-resolved photoelectron spectroscopy of the MgO/Fe(110) system. Appl. Phys. A 82, 489–493 (2006). https://doi.org/10.1007/s00339-005-3447-2

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Keywords

  • Scanning Tunneling Microscopy
  • Spin Polarization
  • Auger Electron Spectroscopy
  • Scanning Tunneling Microscopy Image
  • Valence Band Edge