Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 63: Posters: Scanning Probe Methods
O 63.3: Poster
Mittwoch, 2. April 2014, 17:30–21:00, P2
Electronic and magnetic properties of Gd3N@C80 on Cu(100) — •Gelavizh Ahmadi1, Christian F Hermanns1, Matthias Bernien1, Alex Krüger1, Christian Schmidt1, Sören T Waßerroth1, Benjamin W Heinrich1, Martin Schneider2, Piet W Brouwer2, Katharina J Franke1, Eugen Weschke3, and Wolfgang Kuch1 — 1Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 2Institut für Theoretische Physik and Dahlem Center for Complex Quantum Systems, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 3Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489 Berlin, Germany
Rare earth elements with large magnetic moments have attracted enormous attention in spintronic studies. One promising way to gain a better control of their magnetic properties is using a carbon cage to encapsulate them. We use scanning tunneling microscopy (STM) and spectroscopy (STS) combined with angle-dependent X-ray magnetic circular dichroism (XMCD) to investigate Gd3N@C80 endohedral fullerenes adsorbed on Cu (100). STM topographs reveal that the molecules adsorb with different orientation with respect to the substrate. Spectra of the differential conductance show resonances which are linked to the molecular orbital of the carbon cage. Depending on the orientation of the fullerene cage the energy position of the molecular orbitals varies. Furthermore XMCD spectra evidence ferromagnetic coupling of the magnetic moments of the gadolinium atoms within one cage.