Resumo

JIMENEZ-MIER, J. et al. Electron dynamics of transition metal compounds studied with resonant soft x-ray scattering. Rev. mex. fis. [online]. 2011, vol.57, suppl.1, pp.6-13. ISSN 0035-001X.

High resolution experimental data for resonant soft x-ray scattering of transition metal compounds are shown. The compounds studied are the ionic transition metal di-fluorides, ionic and covalent orthovanadates and members of the La_1-xSr_xCoO₃ perovskite family. In all compounds we studied the transition metal L_2,3 edge and also the ligand (oxygen or fluorine) K edge. For the ionic compounds the transition metal data are in good agreement with atomic multiplet ligand field calculations that include charge transfer effects. Density functional calculations give very useful information to interpret the ligand x-ray emission data. The experimental metal L_α emission data show that the region between valence and conduction bands in the di-fluorides has several d-excited states. At the L₂edge of the ionic orthovanadates we found the signature of a fast Coster-Kronig decay process that results in a very localized emission peak. Changes in the oxidation sate in the La_1-xSr_xCoO₃ compounds are observed at both the metal L_2,3 edge and the oxygen K edge absorption spectra.

Palavras-chave : Resonant inelastic x-ray scattering; transition metal oxides and fluorides; electronic structure; Coster-Kronig decay.

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