Regensburg 2013 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 13: Poster Session III: Layer properties: electrical, optical and mechanical properties; Thin film characterization: structure analysis and composition (XRD, TEM; XPS, SIMS, RBS..)
DS 13.22: Poster
Montag, 11. März 2013, 17:00–20:00, Poster B1
Construction of a multichromatic dual-beam magnetometer using a triaxial magnetic field based on the magnetooptic Kerr effect — •Gerhard Götz, Timo Kuschel, and Günter Reiss — University of Bielefeld, Germany
In this work we present the construction and optimization of a home-built magnetometer for investigations of the magnetic properties of thin films via the magnetooptic Kerr-Effect (MOKE). Based on a dual-beam system the polar MOKE as well as the quadratic MOKE can be measured seperately without contribution of the longitudinal MOKE using perpendicular incidence. The magnetic field can be applied in three dimensions to magnetize samples with in-plane or out-of-plane magnetization. The sample can be rotated around the sample normal to examine its in-plane anisotropy. Also the magnetization reversal process of in-plane and out-of-plane magnetized samples can be reconstructed and characterized by vectorial magnetometry via MOKE measurements using s- and p-polarized incident light and different magnetic field directions. Four laser diodes are used to study the linear and the quadratic MOKE spectrally using different wavelengths for the incident light in the visible range.
All this measurement modi are demonstrated in this work using Permalloy, Fe3O4 and (CoFe)77Tb23 thin films.