Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 58: Poster Session III (Solid/liquid interfaces; Metals; Semiconductors; Oxides and insulators)

O 58.25: Poster

Mittwoch, 28. März 2012, 18:15–21:45, Poster B

Deposition and investigation of Mn₁₂ single molecule magnets on surfaces — •Philipp Erler¹, Stefan Ambrus², Sebastian Höll¹, Samuel Bouvron¹, Sönke Voss¹, Michael Burgert², Ulrich Groth², Elizabeta Cavar¹, and Mikhail Fonin¹ — ¹Fachbereich Physik, Universität Konstanz, 78457 Konstanz — ²Fachbereich Chemie, Universität Konstanz, 78457 Konstanz

Single molecule magnets (SMMs) represent a class of metalorganic compounds which show magnetic bistability of purely molecular origin and a rich quantum spin behavior below a certain blocking temperature. Because of their superparamagnetic properties and the additional benefits of a monodisperse size distribution, an inexpensive fabrication through self-assembly and the chemical tunability of their molecular ligand shell, SMMs are particularly interesting for applications in spin-based data storage and quantum-computing technologies.

Here we present a detailed study of several Mn₁₂ derivatives chemically bound to a gold surface. We investigated the structural and electronic properties of the Mn₁₂ molecules in a self-assembled monolayer by means of scanning tunneling microscopy (STM) and spectroscopy (STS) and X-ray photoelectron and absorption spectroscopy (XPS, XAS). Low temperature STM images are shown, revealing a submolecular resolution. Furthermore, we implemented electrospray ionization (ESI) for the deposition of Mn₁₂ molecules in ultra high vacuum. In contrast to a wet chemical preparation procedure, this method offers the advantages of a control over the surface coverage and a free choice of the substrate and the molecular ligand.