Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 28: Bio- and molecular magnetism including biomedical applications
MA 28.4: Vortrag
Mittwoch, 3. April 2019, 10:15–10:30, H52
Magnetism of highly-ordered Fe4 single molecule magnets on a superconductor — •Fabian Paschke1, Vivien Enenkel1, Michal Studniarek2, Jan Dreiser2, and Mikhail Fonin1 — 1Fachbereich Physik, Universitaet Konstanz, 78457 Konstanz, Germany — 2Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, Switzerland
The controlled deposition, characterization and manipulation of single molecule magnets (SMMs) on surfaces is one of the crucial investigation topics with regard to their possible implementation as units in future electronic and spintronic devices. Fe4 derivatives are among the most investigated SMMs showing a giant spin and a variety of quantum mechanical phenomena [1]. We recently employed inelastic electron tunneling spectroscopy (IETS) on single molecules to confirm the retained molecular magnetism upon deposition on the isolating graphene surface [2,3].
Here we present the successful deposition and investigation of Fe4H SMMs on superconducting Pb(111). Using scanning tunneling microscopy (STM) and spectroscopy (STS) we reveal a highly-ordered self assembly of intact Fe4H molecules and deduce the electronic molecule-substrate interaction by measuring HOMO and LUMO resonances. Magnetic exchange interaction and anisotropy are accessed by IETS and XMCD measurements, revealing the influence of the superconducting Pb surface on the molecular magnetism.
[1] C. Cervetti et al., Nat. Mat. 15, 164 (2015). [2] L. Gragnaniello et al., Nano Lett. 17, 7177 (2017). [3] F. Paschke et al., 2018, submitted.