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Nanostructuring iron into dots by means of a metalorganic network

AuthorsHernández-López, Leyre; Lobo-Checa, Jorge ; Piquero-Zulaica, Ignacio; Piantek, Marten; Serrate, David; Bartolomé, Fernando
Issue Date2018
CitationFuerzas y Túnel (2018)
AbstractMetal-organic interactions are weaker than covalent ones, allowing the bond breaking and formation necessary to generate large and extended self-assembled structures. Under ultra-high vacuum conditions, we grow and characterize Fe clusters using a selected metalorganic network as a buffer layer. 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 an 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 the usual bi-layer islands, the Fe forms single atomic height nanoclusters. We have performed a STM study of such Fe nanostructures as a function of coverage and deposition temperature. In addition, X-ray Magnetic Circular Dichroism (XMCD) experiments at the ESRF show that the Fe nanostructures (stable at room temperature) significantly change the magnetic anisotropy compared to the case when the molecular layer is missing.
DescriptionResumen del trabajo presentado a la Conferencia bienal Fuerzas y Túnel, celebrada en Jaca (España) del 27 al 29 de junio de 2018.
Appears in Collections:(ICMA) Comunicaciones congresos
(CFM) Comunicaciones congresos
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