Negative Direct Recoil Spectroscopy Study of the Initial Oxidation of the Mg(0001) Surface

B. C. Mitrovic, D. J. O'Connor and Y. G. Shen
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B. C. Mitrovic: Department of Physics, University of Newcastle, Callaghan, NSW, Australia
D. J. O'Connor: Department of Physics, University of Newcastle, Callaghan, NSW, Australia
Y. G. Shen: Department of Physics, University of Newcastle, Callaghan, NSW, Australia

Surface Review and Letters (SRL), 1998, vol. 05, issue 02, 599-604

Abstract: The sub monolayer oxygen-covered Mg(0001) surface has been studied by negative direct recoil spectroscopy (DRS) with the aim of detecting or dismissing the presence of subsurface oxygen atoms. Recorded incidence scans show that at room temperature and with the coverage of 70% of saturation, as measured by DRS, one of two subsurface sites (oC and tA) may be populated. This supports a recent investigation of this surface using forward focusing of Auger electrons, where the most likely occupied subsurface site was found to be the oC site. Furthermore, it was found that about 90% of the oxygen still remains above the surface, while only about 10% penetrates below the surface.

Date: 1998
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DOI: 10.1142/S0218625X98000980

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