Abstract

JIMENEZ-MIER, J et al. Ligand field and interference effects in L-edge x-ray Raman scattering of MnF₂ and CoF₂. Rev. mex. fis. [online]. 2008, vol.54, suppl.1, pp.30-35. ISSN 0035-001X.

We present experimental results for x-ray absorption and resonant emission at the L-edge of the transition metal in MnF₂ and CoF₂. The emission data are corrected for self-absorption. The data are compared with calculations in both the free-ion approximation and with the effect of the ligand field of D_4h symmetry included. The results of the calculations take into account interference terms in the Kramers-Heisenberg expression. We obtain very good agreement between experiment and theory for both x-ray absorption and resonant emission in the two compounds. The inclusion of the ligand field is important to achieve such agreement. However, the results of the calculation that does not take into account the interference terms are in better agreement with experiment, indicating that the model used probably overestimates the importance of interference effects.

Keywords : x-ray Absorption; x-ray emission; electronic structure; transition metal compounds.