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Regensburg 2013 – scientific programme

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MA: Fachverband Magnetismus

MA 50: Poster II

MA 50.27: Poster

Friday, March 15, 2013, 10:30–13:30, Poster D

Investigations of magnetic properties of thin (Mn,Zn)Fe2O4 films on SrTiO3 — •Martin Welke1, Stephan Borek2, Kerstin Brachwitz3, Annette Setzer3, Michael Lorenz3, Pablo Esquinazi3, Marius Grundmann3, Karl-Michael Schindler2, Angelika Chassé2, and Reinhard Denecke11Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig — 2Institut für Physik, Universität Halle — 3Institut für Experimentelle Physik II, Universität Leipzig

The work presented deals with Mn-Zn ferrite (Mn0.5Zn0.5Fe2O4) film on Strontiumtitanate (SrTiO3) as preparative studies towards multiferroic layer systems. The ferrite film was prepared by PLD in 6*10-5 mbar O2 at a substrate temperature of 620 C. XRD phi scans reveal an in plane epitaxial relationship of [100](Mn,Zn)Fe2O4 || [100]SrTiO3. Subsequently SQUID magnetometry measurements are planned in order to obtain magnetization loops. Furthermore, angular dependent XMCD measurements at remanent magnetization have been carried out. There was no remanent out-of-plane magnetization observed in XMCD. In addition, XMLD measurements have been performed in order to proof the antiferromagnetic coupling between Fe atoms. While the measured Mn L2,3 spectra corresponded well to bulk spectra published in literature [1], the Fe L2,3 spectra proof to exhibit defect induced magnetism in XMCD. Theoretical simulations are performed to obtain a detailed understanding. [2]

[1] M. Magnuson et al., Phys. Rev. B, 2006, 74, 172409

[2] E. Stavinski and F.M.F. de Groot, Micron, 2010, 687

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