Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 12: Inorganic/Organic Interfaces: Growth II

O 12.6: Vortrag

Montag, 16. März 2015, 16:15–16:30, MA 005

Single Iron-Phthalocyanine molecules on Fe/W(001): A non-contact atomic force microscopy study at low temperature in UHV — •Josef Grenz, Alexander Schwarz, and Roland Wiesendanger — Institute of Applied Physics, University of Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany

While magnetic exchange force microscopy (MExFM) has been achieved on various substrates [1,2], the detection of a magnetic signal stemming from a single molecule employing atomic force microscopy (AFM) has not been observed so far. Recent work on Cobalt-Phthalocyanine (CoPC) on Fe/W(110) utilizing spin-polarized scanning tunneling microscopy revealed a strong hybridization of the molecular orbitals and substrate 3d states depending on the molecular adsorption, which affects the magnetic properties of the molecule [3]. In this study we deposit single in the gas phase paramagnetic Iron-Phthalocyanine (FePC) molecules on Fe/W(001) and find 7 different adsorption geometries using non-contact atomic force microscopy (nc-AFM). Particularly, we were able to identify the adsorption sites of the central Fe ion for the different geometries on the antiferromagnetic Fe monolayer on W(001), which will influence the magnetic properties of the molecule in its adsorbed state.

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