CALCULATION OF THE RESONANT MAGNETO-OPTICAL PROPERTIES OF TRANSITION METALS AND DISORDERED ALLOYS IN THE X-RAY REGIME

Abstract

A version of the Kubo formula is presented, which allows one to calculate the resonant magneto-optical properties in the X-ray regime for arbitrary materials. This is achieved by representing the underlying electronic structure in terms of the electronic Green's function. Calculating the Green's function within the framework of spin-polarized relativistic multiple scattering theory (SPR-KKR) in particular gives access to spin–orbit-induced resonant magneto-optical properties. Results obtained for the Faraday effect and for the magnetic dichroic part of the complex reflective index n at the K-edge of Co and L 2,3-edges of Fe are found in very good agreement with recent experimental findings. The relation of n with the local magnetic moment is discussed on the basis of the calculated results for the L 3-edges of Pt in fcc-Co x Pt 1-x disordered alloy.