Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 11: Magnetic Thin Films I
MA 11.9: Vortrag
Montag, 7. März 2016, 17:15–17:30, H33
Spectroscopy of quadratic magnetooptic tensor of Fe/MgO thin films — •Robin Silber1,2, Jan Dušek3, Lukáš Beran3, Jaromír Pištora1, Günter Reiss2, Martin Veis3, Timo Kuschel2, and Jaroslav Hamrle1 — 1VSB - Technical University of Ostrava, Czech Republic — 2CSMD, Physics Department, Bielefeld University, Germany — 3Charles University in Prague, Czech Republic
The magnetooptic Kerr effect (MOKE) is a well known and very useful physical phenomenon. MOKE at single wavelength is broadly used for detailed characterization of magnetic materials [1]. MO spectroscopy on the other hand is powerful tool for probing the electronic structure of the magnetic material. Most of the MOKE techniques rely solely on effects linear in magnetization, assuming that contributions of higher order in magnetization are negligible. Here, we present a technique of quadratic MOKE (QMOKE) spectroscopy that is based on the 8-directional method [2]. QMOKE spectra of Fe thin films grown on MgO substrate were acquired. From these, further two complex spectra of the quadratic magnetooptic tensor [3,4] are yielded, using standard Yeh’s 4×4 matrix calculations. Finally, comparison with ab initio calculations is discussed.
[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))
[4] J. Hamrle et al., J. Phys. D: Appl. Phys. 40, 1563 (2007)