Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 19: Poster Session 1 (joint session with BP)
CPP 19.58: Poster
Dienstag, 1. April 2014, 09:30–13:00, P1
Preparation and (magneto-) optical characterisation of thin film organic transition metal complexes — •Frank Lungwitz1, Michael Fronk2, Carola Mende3, Heinrich Lang3, Dietrich R.T. Zahn2, and Georgeta Salvan2 — 1Physics Department, Chemnitz University of Technology, Chemnitz, Germany, now at HZDR, Dresden-Rossendorf, Germany — 2Physics Department, Chemnitz University of Technology, Chemnitz, Germany — 3Chemistry Department, Chemnitz University of Technology, Chemnitz, Germany
Characterisation of thin films of organic materials is an important step in the development of novel electronic and spintronic devices. A class of molecules which have promising perspective for application in such devices are the porphyrins. Due to their thermal stability they are evaporable in vacuum and their optical properties can be tuned by applying different sidegroups. In this work Tetra(methoxy-phenyl)Porphyrins were deposited onto silicon substrates via organic molecular beam deposition (OMBD) and characterised by variable angle spectroscopic ellipsometry (VASE) and magneto-optical Kerr effect spectroscopy (MOKE) in polar geometry. The VASE data were subsequently modelled to recursively calculate the films optical constants, thickness, roughness and the molecules tilt angle with respect to the substrate. Under knowledge of the optical constants the MOKE data were used to obtain the Voigt constant which, as a conversion factor between magneto-optical effects, was employed to determine the magnetic circular dichroism (MCD) spectra of these molecules.