IMFP measurements near Au-Ni alloy surfaces by EPES: indirect evidence of submonolayer Au surface enrichment
作者： M. Krawczyk , L. Zommer , J.W. Sobczak , A. Jablonski , M. Petit
DOI: 10.1016/J.SUSC.2004.06.021
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摘要: Abstract Electron inelastic mean free paths (IMFPs) in Au x Ni 1− alloy samples ( =1, 2 and 5 at.%) were determined experimentally by elastic peak electron spectroscopy. In addition, we also explored the effect of surface segregation determination IMFP. The measurements performed with respect to a standard (relative measurements) without material (absolute measurements). Two Monte Carlo (MC) algorithms used calculate IMFPs. energy dependence IMFP for surfaces both nominal composition enriched up ∼25 at.% was obtained range 200–2000 eV. measured IMFPs compared calculated from TPP-2M predictive formula. It found that studied alloys absolute considerably lower than values relative as well. This deviation can be explained change since experimental depend on concentration low 200–1000
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