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The value of charge of Fe atoms adsorbed on alpha-Al2O3(0001) surface α-Al2O3(0001)
Magkoev T. T.
1, Men Y2, Behjatmanesh-Ardakani R.3, Takaev A. A.1, Khekilaev R. A.1
1Khetagurov North Ossetian State University, Vladikavkaz, Russia
2Shanghai University of Engineering Science, Shanghai, China
3Ardakan University, Yazd-Ardakan, Iran
2Shanghai University of Engineering Science, Shanghai, China
3Ardakan University, Yazd-Ardakan, Iran
Email: t_magkoev@mail.ru
Studying the formation of submonolayer Fe films on the surface of 5 nm thick α-Al2O3(0001) film, via the analysis of intensity ratio of Fe Auger LVV-triplet, it is found that the interface charge transfers from Fe to alumina, and the absolute values of charges acquired by Fe atoms in the coverage range from 0.12 to 0.96 monolayers are measured. Extrapolating the measured charge versus coverage plot to zero coverage the estimate value of charge of single Fe atom adsorbed on α-Al2O3(0001) is determined, which is +0.98e (in electron charge units) Keywords: Surface, adsorption, thin films, metal/oxide systems, iron, aluminum oxide, surface analysis techniques.
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