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O: Fachverband Oberflächenphysik
O 30: Surface Magnetism (joint session O/MA)
O 30.7: Vortrag
Dienstag, 2. April 2019, 12:00–12:15, H37
On the magnetic coupling characteristics of endohedral fullerenes on Au(111) and Cu(111) by scanning tunneling microscopy (STM)/ spectroscopy (STS) and X-ray magnetic circular dichroism (XMCD) — •Emmanouil Koutsouflakis, Lukas Spree, Georgios Velkos, Yaofeng Wang, Sebastian Schimmel, Danny Baumann, Bernd Büchner, Christian Hess, and Alexey Popov — IFW-Dresden, 01069 Dresden, Germany
Single-Molecule Magnets (SMMs) are molecular materials whose molecules may exhibit magnetic properties such as magnetization under zero-field conditions, large relaxation times and high blocking temperatures. Towards molecular electronics and the subsequent controlled manipulation of single spins in SMMs, the obstacle of the insufficient chemical stability of many SMM architectures has to be overcome, in order to facilitate both their organization on substrates and the preservation of their properties.
We report on the alternatives of Trimetallic Nitrides (TNTs) and Dimetallic Fullerenes. TNTs are of the type A3−nBnN@C80 (n=0-3; A, B rare earth metals or transition metals) where a carbon cage encapsulates a triangular cluster of three rare earth/ transition metal atoms and a nitrogen at its center. In dimetallic fullerenes the cluster is consisted of two lanthanide ions forming a covalent bond by an unpaired electron. In situ sub-monolayers on Au(111) and Cu(111) substrate have been developed under UHV conditions and STM/ STS and XMCD techniques have been applied to investigate the disruptive effects that arise on depositing SMMs onto reactive metal surfaces.