Analysis of core-level shifts in some metallic Ni compounds

Abstract

The core-level shifts of Ni${\mathrm{Si}}_{2}$, NiAl, Ni${\mathrm{Al}}_{3}$, and NiCu with respect to pure metallic Ni and atomic Ni, including both initial- and final-state contributions, are calculated by means of linear muffin-tin orbital energy-band calculations, and their origin is critically discussed in terms of charge-transfer and configuration changes.