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Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 4: Bio- und molekularer Magnetismus

MA 4.1: Vortrag

Montag, 7. März 2016, 09:30–09:45, H33

X-ray magnetic circular dichroism on self-assembled Fe4 SMMs at surfaces — •Luca Gragnaniello1, Philipp Erler1, Stefano Rusponi2, Peter Schmitt3, Andreas Irmler1, Fabian Paschke1, Sabina Simon1, Nicole Barth1, Thomas Huhn3, Harald Brune2, Fabian Pauly1, and Mikhail Fonin11Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany — 2Institute of Condensed Matter Physics (ICMP), École Polytechnique Fédérale de Lausanne (EPFL), Station 3, CH-1015 Lausanne, Switzerland — 3Fachbereich Chemie, Universität Konstanz, 78457 Konstanz, Germany

By using electrospray ion beam as a soft deposition method in ultra-high vacuum, we were able to organize Fe4 SMMs in a highly regular superstructure on hexagonal boron nitride/Rh(111) [1] and graphene/Ir(111) templates, as evidenced by scanning tunneling microscopy measurements. On both these substrates Fe4 SMMs lay on the surface with a well-defined flat geometry, corresponding to a homogeneous out-of-plane orientation of the magnetization easy axis of the molecules. Through x-ray magnetic circular dichroism measurements on those systems, we revealed that the magnetic anisotropy of SMMs can be deeply influenced by the choice of the substrate.

[1] P. Erler et al., Nano Lett. 15, 4546-4552 (2015)

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