Optical Studies and Band Structure of Cu–Ni Alloys

Abstract
This paper reports on recent results of optical studies on the Cu–Ni alloy system. Reflectivity measurements have been made on Cu, 84 Cu‐16 Ni, 39 Cu‐61 Ni, and Ni from 0.2–10 eV. Infrared absorption in the Cu‐rich alloy indicates the existence of a virtual bound state approximately 1 eV below the Fermi level. This absorption is related quantitatively to the model of the state and is compared with other dilute alloys of the transition metals.