Quasisimultaneous SIMS-AES-XPS investigation of the oxidation of Ti in the monolayer range

Abstract
In order to calibrate previous secondary ion mass spectrometry (SIMS) measurements on various oxidized metal surfaces in terms of oxygen coverage, quasisimultaneous SIMS, AES, and XPS have been applied to several metal‐oxygen systems. First, results are given for the Ti‐O system. In this case, the oxygen signals obtained with the three methods show an identical dependence on the oxygen exposure and can therefore be used for establishing a coverage scale. The successive stages of oxidation lead to significant changes of first the AES, then the SIMS signals, and finally a chemical shift in XPS.