J. Phys. IV France 7 (1997) C2-497-C2-498
XAFS of Early 4-d Transition Metal Suicides: 4-d Metal L3,2Edge and Si K-Edge StudiesI. Coulthard1, T.K. Sham1, J.D. Garrett2, V.L. Smelyansky1 and J.S. Tse3
1 Department of Chemistry, University of Western Ontario, London N6A 5B7, Canada
2 Brockhouse Institute for Materials Research, McMaster University, Hamilton L8S4M1, Canada
3 Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa K1A 0R6, Canada
Charge redistribution upon metal silieide formation in a series of early 4d transition metal silkides; ZrSi2' NbSi2' and MoSi2', together with the corresponding pure elements has been investigated with XANES at both the metal L3,2-edge and the Si K-edge. ft is found that the metal L3,2-edge exhibits very intense whitelines characteristic of localized unoccupied densities of states of d character at the Fermi level and there are substantial differences between the metal and the silicide. The Si K-edge for the silicides also change markedly compared with pure Si. These results will be discussed in terms of densities of state calculations.
© EDP Sciences 1997