The growth of Co and Ag layers on wet-processed H-passivated Si(lll) substr
ates by molecular beam epitaxy (MBE) has been studied using high resolution
scanning tunneling microscopy (STM) with regard to possible applications o
f the layers in magnetoelectronic devices. Roughness and intermixing at int
erfaces as functions of deposition temperature and layer thickness are key
parameters for the performance of such devices. The initial growth of Co an
d Ag and the influence of Ag atoms on the Si(111) surface reconstructions p
rovide insight into adatom-substrate interactions.