Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 47: Metal substrates: Adsorption of organic / bio molecules V

O 47.6: Vortrag

Mittwoch, 24. März 2010, 11:45–12:00, H36

Modification of magnetic properties of a manganese phthalocyanine by axial coordination of CO molecule — •Anna Strozecka and Jose Ignacio Pascual — Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany

The coordintation of small molecules, like NO, CO or O2, to transition metal phthalocyanines can substantially modify properties of these complexes and their interaction with the underlying substrate. We investigated the effect of coadsorption of CO molecules on magnetic properties of manganese phthalocyanines (MnPc) adsorbed on Bi(110) surface. STM experiments reveal that the Kondo resonance observed for unligated MnPc molecules changes upon bonding of CO to a central metal ion. The increase in the Kondo temperature of the complex indicates the enhancement of spin-electron coupling. The original magnetic state of MnPc is recovered after selective desorption of CO molecules.

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