| dc.description |
A full study of the electronic structures of FeCr<sub>2</sub>S<sub>4</sub> and Fe<sub>0.5</sub>Cu<sub>0.5</sub>Cr<sub>2</sub>S<sub>4</sub> is reported based on x-ray photoelectron spectra (valence band and core levels), x-ray emission spectra (Fe Lα, Cu Lα, Cr Lα, S Kβ<sub>1,3</sub> and S L<sub>2,3</sub>) and ab initio TB-LMTO band structure calculations. In the valence band of FeCr<sub>2</sub>S<sub>4</sub>, the Fe 3d states are found to be more localized than the Cr 3d states, which dominate at the Fermi level. In Fe<sub>0.5</sub>Cu<sub>0.5</sub>Cr<sub>2</sub>S<sub>4</sub>, the distribution of Cr 3d (Cr<sup>3+</sup>) states is unchanged and the Cu ions were found to be in the Cu<sup>+</sup> state. |
