ELECTRONIC-PROPERTIES OF RANDOM MAGNETIC-SURFACES

We have developed a self-consistent spin-Polarized Green's function te chnique within the local spin-density formalism which is suitable for an efficient and reliable description of the electronic and magnetic p roperties of random transition metal surfaces. The all-electron linear muffin-tin orbital method in the tight-binding representation is used to describe the electronic states, while the semi-infinite nature of the system is incorporated within the surface Green's function approac h. The potentials are treated within the atomic sphere approximation i ncluding both the monopole and the dipole components of the charge den sity. The effect of disorder is treated within the coherent potential approximation. Applications to random FeCo overlayers on a non-random fcc Cu(001) substrate are shown.