Composition Dependence of Ni L_(23)M_(45)M_(45) Auger Spectra in Fei__xNi_x Alloys

摘要

Fei__xNi_x alloys have been prepared by arc melting method. This alloy system exhibits a transition from bcc to fcc structure at around 30% Ni concentration. In fcc region lattice parameter follows linear behaviour with concentration suggesting the formation of disordered alloys. Ni L23M45M45 Auger spectra of the alloys have been recorded at room temperature using monochromatic AlK_a radiation as source of excitation. The spectra shift to lower kinetic energy with a decrease of Ni concentration in the alloys. The intensity of ~3F feature decreases with a decrease of Ni concentration of the alloys suggesting charge transfer upon alloy formation.