Regensburg 2010 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 44: Organic Thin Films I

DS 44.6: Vortrag

Freitag, 26. März 2010, 11:30–11:45, H8

Model simulations of magneto-optical Kerr effect spectra of organic films — •Klaus Seidel, Michael Fronk, Dietrich R. T. Zahn, and Georgeta Salvan — Physics Department, Chemnitz University of Technology, D-09107 Chemnitz, Germany

The rotation of the light polarization upon transmission through a magnetized sample is known as the Faraday effect, and the change in the ellipticity as magnetic circular dichroism (MCD). The change in the polarization state induced by reflection on a sample under magnetic field is known as magneto-optical Kerr effect (MOKE). These effects have their origin in the modification of the dielectric properties of the material in the presence of a magnetic field and can be described by a material parameter Q, the so-called Voigt constant, which occurs in the off-diagonal components of the macroscopic dielectric tensor. The MCD spectra are commonly simulated using the Faraday A, B, and C terms and compared to the experimental spectra in order to determine the number of the optical transitions, their energy position, and their electronic origin. In this work we apply the same approach to simulate the Voigt constant of Copper-Phthalocyanine films. In a second step we calculate, with the same set of parameters describing the optical transitions, the MOKE spectra and minimize the least square deviation from the experimental data.