Regensburg 2013 – scientific programme
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MA: Fachverband Magnetismus
MA 28: Magnetic Materials
MA 28.4: Talk
Wednesday, March 13, 2013, 15:45–16:00, H22
Quadratic magneto-optical permittivity coefficiets in cubic Fe, Co, Ni calculated ab-initio — Jana Hamrlova, •Jaroslav Hamrle, Dominik Legut, Kamil Postava, and Jaromir Pistora — Nanotechnology Centre, VSB - Technical University of Ostrava, Czech Republic
Using ab-initio calculations, we determine spectra of the second-order magneto-optical permittivity coefficients (G44, Δ G) for ferromagnetic bcc Fe, fcc Ni and fcc Co. Those second-order magneto-optical permittivity coefficients provide phenomenological description of all second-order magneto-transport effect, such as AMR, quadratic MOKE, XMLD, magneto-refracticity, etc. depending on the investigation technique and the energy of the probing photon (zero photon energy means dc). The calculations of the conductivity/permittivity tensor elements are done within the framework of DFT using general magnetic orientation with respect to the crystal axis. Then, dependence of the permittivity elements on general magnetization orientation is compared with expected dependences as provided by symmetry arguments.