Optical properties and electronic structures of d- and f-electron metals and alloys, Ag-In, Ni-Cu, AuGa2, PtGa2, (beta)(prime)-NiAl, (beta)(prime)-CoAl, CeSn3, and LaSn3

摘要

Optical properties and electronic structures of disordered Ag(sub 1- x)In(sub x)(x = 0.0, 0.04, 0.08, 0.12) and Ni(sub 1-x)Cu(sub x) (x = 0.0, 0.1, 0.3, 0.4) alloys and ordered AuGa(sub 2), PtGa(sub 2), (beta)(prime)-NiAl, (beta)(prime)-CoAl, CeSn(sub 3), and LaSn(sub 3) have been studied. The complex dielectric functions have been determined for Ag(sub 1-x)In(sub x), Ni(sub 1-x)Cu(sub x), AuGa(sub 2), and PtGa(sub 2) in the 1.2--5.5 eV region and for CeSn(sub 3) and LaSn(sub 3) in the 1.5--4.5 eV region using spectroscopic ellipsometry. Self-consistent relativistic band calculations using the linearized-augmented-plane-wave method have been performed for AuGa(sub 2), PtGa(sub 2), (beta)(prime)-NiAl, (beta)(prime)-CoAl, CeSn(sub 3), and LaSn(sub 3) to interpret the experimental optical spectra.