Abstract
An initial oxidation process is studied on 5.59 at. % Si–Fe alloy (100) and iron (100) single crystals by the photoelectric work function combined with Auger electron spectroscopy in the low-pressure range of oxygen (10−8−10−6 Torr). A 46-V Auger peak of iron is split into two peaks (41 and 49 V) followed by an oxygen peak as the iron is oxidized. Oxidation at ∼ 10−6 Torr brings about an abrupt increase in the work function in consequence of the chemisorption of oxygen on the sample.
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