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MA: Fachverband Magnetismus

MA 33: Bio- Molecular Magnetism

MA 33.1: Vortrag

Donnerstag, 26. März 2009, 10:15–10:30, HSZ 103

Mn₁₂ Single-Molecule Magnets on Surfaces: Achievements and Perspectives — •Sönke Voss¹, Michael Burgert², Mikhail Fonin¹, Ulrich Groth², and Ulrich Rüdiger¹ — ¹Fachbereich Physik, Universität Konstanz, 78457 Konstanz — ²Fachbereich Chemie, Universität Konstanz, 78457 Konstanz

During the past years, a variety of studies on the structural, electronic as well as magnetic properties of Mn₁₂ single-molecule magnets (SMMs) deposited on surfaces have been performed. Recent investigations on molecular monolayers indicated the absence of all the fascinating magnetic properties known from SMM single crystals, like hysteresis of purely molecular origin or the ability to directly observe quantum tunnelling of magnetization. Nevertheless, results obtained by means of advanced characterization techniques indicated that fundamental structural as well as electronic properties of individual Mn₁₂ molecules are preserved after the deposition on a surface.

We will present the most recent achievements in the characterization of Mn₁₂ monolayers by means of scanning probe techniques, synchrotron radiation, and magnetization measurements. Potential reasons for the lack of a magnetic hysteresis in the monolayers will be discussed. Furthermore, advanced approaches towards an ultimate clarification of the suitability of Mn₁₂ SMMs for studies on molecule-based spintronic devices will be described.