Dresden 2011 – wissenschaftliches Programm
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KR: Fachgruppe Kristallographie
KR 5: Poster Multiferroics (Joint Session of MA, DF, DS, KR, TT)
KR 5.6: Poster
Dienstag, 15. März 2011, 10:45–13:00, P2
Structure and electronic properties of magnetic molecules on surfaces — •Philipp Erler1, Samuel Bouvron1, Sönke Voss1, Michael Burgert2, Ulrich Groth2, and Mikhail Fonin1 — 1Fachbereich Physik, Universität Konstanz, 78457 Konstanz — 2Fachbereich Chemie, Universität Konstanz, 78457 Konstanz
Molecular-scale spintronic devices are expected to have radically novel properties, with the added benefits of inexpensive fabrication through self-assembly, as well as chemical tunability. Single molecule magnets (SMM) representing mesoscopic systems which show magnetic bistability and rich quantum behavior are particularly interesting for applications in spin-based data storage and quantum-computing technologies.
Here we present a detailed study of structural and electronic properties of various Mn12 clusters chemically bound to a metallic surface, which was performed in order to find efficient preparation routes yielding intact clusters. We extensively studied the electronic properties of monolayers of Mn12 molecules on surfaces by means of scanning tunneling microscopy and spectroscopy at room temperature as well as by photoelectron spectroscopy. Complementary to the experiments on complex SMM molecules, the electronic properties of paramagnetic Cobalt Phthalocyanine molecules on different metallic surfaces were investigated by means of a cryogenic scanning tunneling microscope. We discuss the features in the local density of states measured at 4 K with and without having applied a high magnetic field.