Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 38: Electron Theory of Magnetism and Correlations
MA 38.5: Vortrag
Mittwoch, 22. März 2017, 10:30–10:45, HSZ 403
Ab-initio calculations of QMOKE in bcc Fe, Drude term modelling — •Ondřej Stejskal1, Robin Silber1,2, Jaroslav Hamrle3, Martin Veis3, and Jaromír Pištora1 — 1VSB-Technical University of Ostrava, Czech Republic — 2CSMD, Physics Department, Bielefeld University, Germany — 3Charles University, Prague, Czech Republic
The part of the magnetooptic Kerr effect (MOKE) that is even in magnetization is called the quadratic MOKE (QMOKE). Permittivity tensor fully describes the magnetooptic response of a material. We performed ab-initio calculations of the permittivity tensor in bcc Fe by the WIEN2k code [1]. We also model the intraband contributions via the Drude term [2]. The results are then compared to experiment. This work further includes detailed investigation of key bands contributing to the MOKE signal and their visualisation in Brillouin zone.
[1] P. Blaha, K. Schwarz, G. Madsen, D. Kvasnicka and J. Luitz, WIEN2k
[2] Š. Višňovský, Optics in Magnetic Multilayers and Nanostructures, Taylor and Francis Group, Boca Raton, Florida 2006