Regensburg 2013 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 22: Poster II
DF 22.13: Poster
Freitag, 15. März 2013, 10:30–13:30, Poster D
Magnetization reversal analysis of thin magnetic films studied by magnetooptic Kerr effect including superimposed uniaxial and cubic magnetic anisotropy — •Timo Kuschel1, Jaroslav Hamrle2, Jaromir Pistora2, Kesami Saito3, Subrojati Bosu3, Yuya Sakuraba3, Koki Takanashi3, Henrik Wilkens4, and Joachim Wollschläger4 — 1University of Bielefeld, Germany — 2Technical University of Ostrava, Czech Republic — 3Tohoku University of Sendai, Japan — 4University of Osnabrück, Germany
Fe and Co50Fe50 films on MgO(001) are investigated by vectorial magnetometry via magnetooptic Kerr effect (MOKE). Measurements using s- and p-polarized incident light and an external magnetic field either parallel or perpendicular to the incidence plane of light are performed. Additionally, different in-plane orientations of the crystalline samples with respect to the external magnetic field are analyzed.
The observed magnetic reversal processes reveal two in-plane magnetic easy axes (MEAs) of different strength which are not orthogonal. Atypical magnetization curves including multidomain states with some magnetic moments providing antiparallel alignment to the external field (if projected to the direction of the external field) confirm the appearance of differently strong MEAs. This magnetic structure can be explained by a cubic magnetic anisotropy (CMA) induced by the crystalline film structure superimposed by an additional uniaxial magnetic anisotropy (UMA) which is not parallel to one of the MEAs of the CMA. The results are compared with regular magnetic films having a UMA parallel to one of the MEAs of the CMA.