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O: Fachverband Oberflächenphysik
O 110: Surface Magnetism
O 110.7: Vortrag
Freitag, 22. März 2024, 12:00–12:15, MA 144
Recent Progress in the Investigation of the Magnetic Properties of Individual Lanthanide-Based Dimetallofullerene Single-Molecule Magnets — •Tobias Birk1, Fabian Paschke2, Vivien Enenkel1, Fupin Liu3, Jan Dreiser4, Vladyslav Romankov4, Stanislav M. Avdoshenko3, Alexey A. Popov3, and Mikhail Fonin1 — 1Department of Physics, University of Konstanz, 78457 Konstanz, Germany — 2IBM Research Europe, 8803 Rüschlikon, Switzerland — 3IFW Dresden, 01069 Dresden, Germany — 4SLS, PSI, 5232 Villigen, Switzerland
Due to their rich and versatile chemical and physical properties, single-molecule magnets (SMMs) are in focus of a diverse and broad research community. Especially lanthanide based SMMs are promising candidates for future electronic devices because of long relaxation times and high blocking temperatures. Here we present a dimetallofullerene SMM with a single-electron lanthanide-lanthanide bond within its magnetic core, which shows chemical robustness and a blocking temperature of about 21 K [1]. We perform scanning tunnelling microscopy (STM) and spectroscopy (STS) measurements in order to investigate its electronic and magnetic properties. By investigating two different lanthanides, we demonstrated access to the magnetic core of the molecule [2]. Based on this, we perform inelastic electron tunnelling spectroscopy (IETS), which reveals symmetric conduction steps and additionally a prominent conductance peak due to a Kondo resonance.
[1] F. Paschke et al. Adv. Mater. 2102844 (2021).
[2] F. Paschke et al. Small 2105667 (2022)
Keywords: STM; Molecules; Magnetic Properties; Spindynamics; Inelastic Excitations