In the last 20 years, a large body of knowledge has been gained on
the preparation and characterization of ultra-thin oxide films on noble
and quasi noble metals [1,2]. Oxide/metal inverse model catalysts have
been successfully exploited for the study of complex chemical processes
occurring on solid surfaces. Despite their extreme importance in the
field of spintronics, comparatively much less work has been devoted to
the atomic scale investigation of epitaxial oxide films deposited on top
of ferromagnetic substrates . Whenever an oxide film is grown on the
surface of a ferromagnetic metal, a remarkable structural and chemical
modification of the substrate occur. Taking into account these
alterations is extremely important, since the magnetic order of the
atoms is directly affected by their local chemical environment. By considering
the Fe(001) surface as paradigmatic example of ferromagnetic
substrate and highly reactive metal, I will show how the chemical composition
of the oxide/Fe(001) layered systems can be finely tuned, and
how their magnetic properties depend on the interface chemistry.
 S. Surnev, A. Fortunelli, F.P. Netzer Chem. Rev. 113, 4314
 HJ Freund, G. Pacchioni Chem. Soc. Rev. 37, 2224 (2008).
 A. Picone et al. Surf. Sci. Rep. 71, 32 (2016).