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MA: Fachverband Magnetismus
MA 33: Surface Magnetism II (jointly with O)
MA 33.8: Vortrag
Mittwoch, 9. März 2016, 17:00–17:15, H31
Orienting the magnetic easy axes of molecular single-ion magnets by a graphene interlayer — •Jan Dreiser1,2, Giulia E. Pacchioni2, Fabio Donati2, Luca Gragnaniello2, Alberto Cavallin2, Kasper S. Pedersen3, Jesper Bendix4, Bernard Delley5, Marina Pivetta2, Stefano Rusponi2, and Harald Brune2 — 1Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI — 2Laboratory of Nanostructures on Surfaces, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne — 3CNRS, CRPP, UPR 8641, F-33600 Pessac and CNRS, ICMCB, UPR 9014, F-33600 Pessac — 4Department of Chemistry, Copenhagen University, DK-2100 Copenhagen — 5Condensed Matter Theory, Paul Scherrer Institut, CH-5232 Villigen
Molecular single-ion magnets (SIMs) [1] are attractive for spintronics applications because of the quantum nature of their spin and the long magnetization lifetimes. We have studied Er(trensal) SIMs [2] adsorbed on graphene/Ru(0001), graphene/Ir(111) and on bare Ru(0001) by scanning tunneling microscopy and x-ray magnetic circular dichroism. On graphene the molecules self-assemble into a densely packed layer with their magnetic easy axes oriented perpendicular to the surface. In contrast, on bare Ru(0001) the molecules are disordered and exhibit different orientations of the easy axes. The graphene-substrate moiré pattern which exhibits a stronger periodic corrugation on Ru(0001) than on Ir(111) does not influence the adsorption and magnetic properties of the molecules. [1] J. Dreiser, J. Phys.: Condens. Matter 27, 183203 (2015). [2] K. S. Pedersen et al., Chem. Sci. 5, 1650 (2014).