Abstract
Auger Electron Spectroscopy (AES) and Atomic-Force-Microscopy (AFM) were used to study the formation of a very thin Aluminum oxide on cobalt and the surface roughness. The results show that the super…cial oxide (AlOx) which is obtained after oxidation at room temperature (RT) of one aluminum monolayer (ML), is not alumina (Al2O3). It presents a composition pro…le close to ..../Co/Co/Al/O. This super…cial oxide is very stable with temperature since there is no dissolution process of AlOx oxide at least up to 500 � C. The super…cial oxide formation do not change the initial surface roughness of the cobalt.
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