Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 25: Oxide and Insulator Surfaces: Structure and Growth
O 25.5: Poster
Montag, 7. März 2016, 18:15–20:30, Poster E
Structural and magneto-optic properties of epitaxial iron films on MgO(001) — •Jannis Thien1, Olga Kuschel1, Timo Oberbiermann2, Timo Kuschel2, and Joachim Wollschläger1 — 1Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, 49069 Osnabrück, Germany — 2Fakultät für Physik, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany
For years it is known that the linear magneto-optic Kerr effect depends on the wavelength of the applied laser. The currently outstanding question is a wavelength dependence for the quadratic magneto-optic Kerr effect as proposed by theoretical calculations for cubic crystals [1].
In order to compare the theoretical predictions with experiment, crystalline samples are needed. Thus, epitaxial iron films were grown by molecular beam epitaxy on MgO(001) at different temperatures. Each sample was capped with an amorphous silicon film at room temperature to prevent oxidation of the iron film. For the purpose of examining the purity of the evaporated iron, XPS measurements were made. The structural characterization was realised by LEED, XRR, AFM and XRD measurements. The magnetic properties were probed by MOKE experiments.
Both chemical composition and structural as well as magnetic properties of the iron film change with increasing deposition temperature. From these results the sample with the most promising characteristics was choosen for the study of wavelength dependence of the quadratic magneto-optic Kerr effect.
[1] Hamrlová et al., submitted