Resumo

JIMENEZ-MIER, J et al. Study of the electronic structure of transition metal compounds by absorption and emission of X-rays. Rev. mex. fis. [online]. 2007, vol.53, suppl.3, pp.38-42. ISSN 0035-001X.

We present results of x-ray absorption and x-ray emission spectroscopies of transition metal oxides and fluorides. The absorption is studied in the vicinity of the transition metal L edge. At selected values of the excitation energy we also show emission spectra. The data are interpreted in terms of the multiplet structure of the transition metal ion in a crystal field, considering also configuration interaction effects in the solid such as charge transfer. The data are compared with results of free-ion calculations that allow a direct interpretation of the absorption spectra. The free-ion calculations also indicate that some of the main emission features correspond to d to d excitations in the compound, with the emission peaks with higher energy losses resulting from production of charge transfer states

Palavras-chave : Synchrotron radiation; x-ray absorption and emission; transition metal oxides and fluorides; electronic structure.

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