Capping effects of Au on Fe/GaAs(001) studied by magneto-optical Kerr effect

Molecular beam epitaxially grown Fe on GaAs(001) capped by Au overlayer with variable thickness had been investigated in situ by magneto-optical Kerr effect (MOKE). It is observed that the MOKE intensity as a function of Au film thickness decays much faster than that derived from the well-known Zak&...

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Bibliographic Details
Published in:Thin solid films 2007-06, Vol.515 (18), p.7290-7293
Main Authors: Lei, N., Tian, Y., Tian, C.S., Zhou, L.H., Yin, L.F., Dong, G.S., Jin, X.F.
Format: Article
Language:English
Subjects:
Capping effect
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fe/GaAs
Materials science
MOKE
Other semiconductors
Physics
Specific materials
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Summary:Molecular beam epitaxially grown Fe on GaAs(001) capped by Au overlayer with variable thickness had been investigated in situ by magneto-optical Kerr effect (MOKE). It is observed that the MOKE intensity as a function of Au film thickness decays much faster than that derived from the well-known Zak's theory. This can be explained by different optical parameters of ultrathin films from bulk values. It is also found that a minimum thickness of 1.4 nm Au is needed to effectively prevent the oxidation of Fe film at 300 K in atmosphere.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2007.03.009