SOFT-X-RAY EMISSION-SPECTROSCOPY OF EARLY TRANSITION-METAL COMPOUNDS

Soft X-ray emission studies for several early transition metal compoun ds, such as Sc, Ti and V compounds, have been studied. Raman scatterin g was found at the 2p --> 3d excitation in the transition metal compou nds. The elementary excitation of the Raman spectrum is mainly elucida ted by the d-d transition within the 3d bands, as well as the interban d transition from the O 2p valence band to the conduction band, which consists mainly of transition metal 3d states. The charge transfer tra nsition due to the localized electron picture is dominant in the soft X-ray spectra of Sc compounds. Raman scattering is a powerful tool in the study of the electronic structure of transition metal compounds. ( C) 1998 Elsevier Science B,V. All rights reserved.