Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 50: Poster II
MA 50.9: Poster
Freitag, 15. März 2013, 10:30–13:30, Poster D
Towards novel functionality with metal and complex oxide thin films prepared with molecular beam epitaxy — •Alexander Weber1, Markus Waschk1, Alexandra Steffen2, Sabine Pütter2, and Thomas Brückel1 — 1Jülich Centre for Neutron Science JCNS-2 und Peter Grünberg Institut PGI-4: Streumethoden, Forschungszentrum Jülich GmbH — 2Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, Außenstelle am FRM II, Garching
At the Jülich Centre for Neutron Science two state of the art Oxide Molecular Beam Epitaxy systems were commissioned in 2010. Up to now we managed to produce thin metal and oxide films in single layers as well as multilayers, like Fe/Cr, LaSrMnO3 a.s.f. with high crystalline quality and very low roughness. Here we present the results on LaMnO3/SrMnO3 (LMO/SMO) multilayers grown on SrTiO3 with inter layer roughness of one mono layer. The multilayers show an interface induced ferromagnetic behavior within the LMO in contrast to the antiferromagnetic behavior of the single layers. The structural analysis concerning layer thickness and unit cell size was done with X-ray reflectometry and X-ray diffraction. We carried out a thickness dependent study of the magnetic moment induced by the interfaces with SQUID magnetometry. Here we observed a raise in the net magnetic moment of the LMO with decreasing layer thickness. To study the depth resolved magnetization profile within the LMO we measured several multilayers with varying layer thickness on D17 at the ILL. The results fit well to our simple model for the magnetic profile.