GROWTH AND STRUCTURE OF THIN CO FILMS ON CU(111) STUDIED BY FULL-SOLID-ANGLE X-RAY PHOTOELECTRON DISTRIBUTIONS

Photoelectron spectroscopy at kinetic energies of almost-equal-to 570 eV has been performed on a Cu(111) surface with Co coverages of up to 50 monolayers. The angle-integrated data indicate that tall islands de velop with Cu atoms in the top layers. The angular distributions of th e photoelectrons were measured using a display-type analyzer with an o pening angle of 88-degrees. The Co emission patterns always show some threefold symmetry corresponding to the fcc structure of the clean Cu( 111) surface. Most of the Co atoms are in the hcp structure and this f raction increases with coverage.