Abstract
The chemical interaction between titanium and in coevaporated titanium-fulleride films has been investigated by x-ray photoelectron spectroscopy, (XPS), x-ray absorption spectroscopy (XAS), and x-ray emission spectroscopy. Two titanium-fulleride films with different Ti concentrations ( and 3.6) and a pure film were chosen in this study. C XPS analyses show a binding-energy shift and a line-broadening effect. C XAS study of shows a small change of the absorption resonance, with respect to its intensity and energy position, and a variation of the spectral shape in the absorption region in comparison with pure The C Kα x-ray emission spectra of the films show the same total emission bandwidth as pure For resonant and nonresonant excitations, an x-ray spectral profile similar to pure is observed from the film, while the film results in a spectral profile with some contribution from titanium carbide. All the experimental results indicate that a titanium-fulleride compound has been formed in the coevaporation process of and titanium.
- Received 26 August 1998
DOI:https://doi.org/10.1103/PhysRevB.59.12667
©1999 American Physical Society