Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 17: Poster Session I
MA 17.30: Poster
Dienstag, 8. März 2016, 09:30–12:30, Poster B1
Microscopic and spectroscopic investigation of self assembled Fe4 single molecule magnets on surfaces — •Fabian Paschke1, Philipp Erler1, Peter Schmitt2, Nicole Barth1, Andreas Irmler1, Thomas Huhn2, Fabian Pauly1, Luca Gragnaniello1, and Mikhail Fonin1 — 1Fachbereich Physik, Universität Konstanz, 78457 Konstanz — 2Fachbereich Chemie, Universität Konstanz, 78457 Konstanz
The investigation of single molecule magnets (SMMs) allows the observation of unique magnetic properties, such as pure molecular hysteresis and quantum tunneling of magnetization. The deposition of intact SMMs on suitable substrates as well as the investigation and control of their magnetic properties is a part of a promising route to molecular-based data storage or quantum computing applications.
Here we show the controlled deposition of an Fe4 SMM by means of electrospray ionization on two different substrates, namely h-BN/Rh(111) and graphene/Ir(111). The organic ligand shell of the complex is tailored by choosing the shortest tripodal ligand possible, resulting in a highly ordered self-assembly of flat lying molecules, whose anisotropy axis is oriented perpendicular to the sample surface. Sub-monolayers and well-ordered monolayers of Fe4 molecules are investigated by scanning tunneling microscopy and spectroscopy. Typical dI/dV spectra obtained around the Fermi energy are symmetrical with steps at energies of around 5 meV. We attribute these features to spin-excitations of the molecules due to a spin-flip of the tunneling electron.