Growth of single-layer and multilayer Co/TiO2 nanostructures with bulklike properties

We have studied the surface morphology, interfaces, and structure of individual Co and TiO 2 films 2 to 10 nm in thickness and those of Co/TiO 2 multilayers up to 100 nm in thickness. Auger depth profiling and transmission electron microscopy results show that [Co(2 nm)/TiO 2 (2 nm)] 15 , [Co(2 nm)/TiO 2 (4 nm)] 15 , and [Co(4 nm)/TiO 2 (4 nm)] 12 structures are composed of continuous layers well adherent to one another, with sharp interfaces. The conclusion is made that such multilayer structures can be used as model systems in designing magneto-optical and spintronic devices.