Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 68: Nanostructures at Surfaces: 1D, 2D Structures and Networks
O 68.8: Poster
Wednesday, March 9, 2016, 18:15–20:30, Poster A
Tuning the Interaction of Magnetic Molecules with a Metallic Substrate via an Insulating Film — David Schwickert1, Maciej Bazarnik1, •Micha Elsebach1, Bernhard Bugenhagen2, Marc H. Prosenc3, and Roland Wiesendanger1 — 1Institute for Nanostructures and Solid State Physics, University of Hamburg, D-20355 Hamburg, Germany — 2Institute of Inorganic Chemistry, University of Hamburg, D-20146 University of Hamburg, Germany — 3Dept. of Chemistry, Technical University Kaiserslautern, Erwin-Schrödinger-Str. 52, D-67663 Kaiserslautern, Germany
Magnetic molecules are a promising approach towards spin-based information technology. We use Co-Salophene as a tailored building block for spintronic devices. The possibility to build self-assembled covalently bonded chains by tailored on-surface chemistry makes this molecule a perfect candidate for an all-spin based device.
However, it is necessary to eliminate Kondo screening of the magnetic centers of the molecules. We use ultrathin films of NaCl to decouple the molecules from the metallic surface. The Ullmann reaction requires a Au-crystal as catalyst. Therefore, we intercalate the presynthesized chains with NaCl.
In this presentation we show the dependence of the intercalation on the sample temperature during the deposition, as well as the deposition rate and time. For low coverages of NaCl, monolayer and double layer islands grow between the chains. With increasing coverage the chains are pushed ahead by the growing islands. When two islands grow together, a chain lying between them is lifted up.