The local and electronic structures of Al90FexCe10-x alloys (x=3,5,7): XANES analysis

The x-ray absorption near-edge structure (XANES) of Al90FexCe10-x (x = 3, 5 , 7) is measured above the Fe K edge and analyzed theoretically by the mult iple scattering method. By comparing the experimental data with the theoret ical findings, the most adequate model for describing the neighbor environm ent of Fe atoms is chosen. Since the dipole transition matrix element is a smoothly varying function of energy near the Fe K edge, the x-ray absorptio n fine structure in this energy range characterizes the density of free p s tates of Fe in the conduction band of Al90FexCe10-x alloys. (C) 2001 MAIK " Nauka/Interperiodica".