Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 6: Magnetic Instrumentation and Characterization
MA 6.5: Vortrag
Montag, 20. März 2017, 10:30–10:45, HSZ 403
Spectroscopy of the quadratic magnetooptic tensor of materials with the cubic structure — •Robin Silber1,2, Ondřej Stejskal1, Jan Dušek3, Lukáš Beran3, Jaromír Pištora1, Günter Reiss2, Martin Veis3, Timo Kuschel2,4, and Jaroslav Hamrle3 — 1VSB - Technical University of Ostrava, Czech Republic — 2CSMD, Physics Department, Bielefeld University, Germany — 3Charles University, Prague, Czech Republic — 4University of Groningen, The Netherlands
The magnetooptic Kerr effect (MOKE) is a well known and very useful tool in the field of ferromagnetic material characterization [1]. Most of the MOKE techniques rely solely on effects linear in magnetization (M). Nevertheless, there is also its part being even in M, the quadratic MOKE (QMOKE). Handling and understanding the underlying origin of QMOKE could be key to utilize this method for research of antiferromagnetic materials in the future. Here, we present a technique of QMOKE spectroscopy based on the 8-directional method [2] applied on the Fe thin films grown on MgO substrate. From measured QMOKE spectra, further two complex spectra of quadratic magnetooptic (MO) tensor [3] are yielded, using standard Yeh’s 4×4 matrix formalism. Those quadratic MO parameters are further discussed and compared with ab-initio calculations.
[1] T. Kuschel et al., J. Phys. D: Appl. Phys. 44, 265003 (2011)
[2] K. Postava et al., J. Appl. Phys. 91, 7293 (2002)
[3] Š. Višňovský, Czech. J. Phys. B 36, 1424 (1986)