Regensburg 2010 – scientific programme

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MA: Fachverband Magnetismus

MA 6: Magnetic Thin Films I (Heusler Alloys)

MA 6.11: Talk

Monday, March 22, 2010, 17:00–17:15, H10

Determination of magneto-optical coupling constant of ferromagnetic metals — •Kahming Mok¹, Nan Du¹, Maciej Oskar Liedke¹, Shengqiang Zhou¹, Mathias Schubert², Manfred Helm¹, and Heidemarie Schmidt¹ — ¹Forschungszentrum Dresden Rossendorf, Dresden, Germany — ²University of Nebraska-Lincoln, Nebraska, USA

Magneto-optical generalized ellipsometry (MOGE) is the most general approach to characterize the magneto-optical response of multilayer materials. One of the most basic mechanism in magneto optics is the spin nature of the electrons and the spin dependent selection rules. The characterization of magneto-optical materials typically requires 3 independent complex-valued parameters in its purely magneto-optical tensor description [1]. In our work, we measured the Mueller matrix of MBE grown ferromagnetic thin films (Co, Fe, Ni) using a variable angle spectroscopic ellipsometer (VASE) combined with a 3D 0.5 T vector magnet which can operate as a vector MOGE. We probed the Mueller matrix of reflected and transmitted light in the spectral range from 1 to 4 eV and modeled it by the 4 x 4 matrix method. From that we determined the complex magneto-optical coupling constants Q of Co, Fe, and Ni. [1] M. Schubert, "Infrared ellipsometry on semiconductor layer structures: Phonons, plasmons, and polaritons", Springer, Berlin, 2004.