Berlin 2015 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: POSTER Ia
MA 19.52: Poster
Dienstag, 17. März 2015, 09:30–13:00, Poster A
Out-of-plane and in-plane vector MOKE investigations of CoFeTb thin films — •Timo Oberbiermann, Gerhard Götz, Christoph Klewe, Günter Reiss, and Timo Kuschel — CSMD, Physics Department, Bielefeld University, Germany
Ferromagnetic thin films with an out-of-plane (oop) magnetic easy axis are of great interest, due to their potential for realizing next-generation spintronic devices like magnetic tunnel junctions which are capable of current-induced magnetization switching.
We used vectorial magnetometry based on the magnetooptic Kerr effect to investigate the magnetic properties of (CoFe)1−xTbx thin films which exhibit a partial oop-directed magnetization.
An established method uses the change in polarization for reflected s- and p-polarized light as well as different orientations of the sample and the external field directions in order to determine all three components of the magnetization vector [1]. Therefore, this technique needs several changes in the setup. However, another recently reported method [2] allows to obtain the in-plane components without setup changes by measuring the changes in polarization and reflectivity at the same time.
As a combination we now observe the changes in polarization and reflectivity simultaneously, both for s- and p-polarized light. This allows a quantitative determination of all three magnetization components during the reversal process of the magnetization in (CoFe)1−xTbx thin films without altering the experimental setup.
[1] T. Kuschel et al., J. Phys. D: Appl. Phys. 44, 265003 (2011)
[2] E. Jiménez et al., Rev. Sci. Instrum. 85, 053904 (2014)