Metallorganic 2D networks as a buffer layer to grow magnetic nanoclusters

Resumen del trabajo presentado a la 21st International Conference on Magnetism (ICM), celebrada en San Francisco (US) del 15 al 20 de julio de 2018.Metal-organic interactions are weaker than the covalent ones, allowing the bond formation and breaking necessary to self-assemble, but are stronger than the purely intermolecular interactions. This is why metalorganic networks own so interesting properties. In this work, we grow and characterize Fe upon a selected molecular network under ultra-high vacuum conditions. The resulting self-assembled structures are characterized by means of Scanning Tunnelling Microscopy and Low Energy Electron Diffraction. We use a Cu(111) monocrystal as substrate and generate a self-assembled, extended metalorganic network which is stable at room temperature. It will be shown that depending on the molecular coverage the porous network evolves into a compact structure detectable by LEED. Once the porous network is formed, Fe atoms are evaporated on the surface. Instead of he usual bi-layer islands, the Fe forms single atomic height nanoclusters. We have performed a STM study of the Fe nanostructures as a function of coverage and deposition temperature. In addition, X-ray Magnetic Circular Dichroism experiments at the European Synchrotron Radiation Facility show that the Fe nanostructures (stable also at room temperature) significantly change their magnetic anisotropy compared to the case when the molecular layer is missing.Peer Reviewe