Dresden 2020 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 110: Surface Magnetism I (joint session O/MA)

O 110.2: Vortrag

Donnerstag, 19. März 2020, 15:15–15:30, WIL A317

Influence of the Molecular Arrangement on the Magnetic Properties of FePc and FePcF16 thin films — •Katharina Greulich1, Axel Belser1, Sven Bölke1, Reimer Karstens1, Peter Nagel2, Stefan Schuppler2, Michael Merz2, Thomas Chassé1, and Heiko Peisert11Institute of Physical and Theoretical Chemistry, University of Tübingen — 2Institute for Solid-State Physics, Karlsruhe Institute of Technology

The electronic configuration and thus the magnetic properties of the central metal atom of some transition metal phthalocyanines are not fully understood and have been intensely debated over the last years. A particularly broad complexity of the electronic structure is expected for Fe(II) phthalocyanines and porphyrins. In our XPS, XAS and XMCD studies, we compare thin films of FePc with their perfluorinated counterpart FePcF16. The results indicate that the magnetic and electronic properties of the central Fe atom depend distinctly on the arrangement of the molecules in thin films. Compared to FePcF16, FePc shows an unusually large XMCD signal at the Fe L3,2-edge pointing to collective magnetic properties that do not seem possible in FePcF16 due to a different molecular arrangement.

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