Berlin 2015 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 36: Poster Session I

DS 36.56: Poster

Donnerstag, 19. März 2015, 09:30–12:00, Poster A

Structural characterisation of epitaxial thin magnetite films grown on SrTiO₃(001) — •Wanja Spiess, Olga Schuckmann, Tobias Schemme, Karsten Küpper, and Joachim Wollschläger — Physics Department, Osnabrück University, Germany

Magnetite is a promising material for various physical and chemical applications in different fields as spintronics [1] and catalysis [2]. It has been demonstrated that the electronic and magnetic properties of Fe₃O₄ films could be influenced by the difference of the strain, stoichiometry or defect states, e.g., using SrTiO₃(001) as substrate [3,4].
In this study structural properties of ultrathin magnetite films grown on SrTiO₃(001) were investigated. The films were deposited at different temperatures on single crystalline niobium doped SrTiO₃(100) substrates by reactive molecular beam epitaxy (RMBE, Fe evaporation in O₂ atmosphere). The surface stoichiometry and structure of the oxide films was controlled by x-ray photoelectron spectroscopy (XPS) and by low energy electron diffraction (LEED). The film structure was characterized by synchrotron radiation x-ray diffraction (XRD) during growth, showing that the strain of the films is strongly affected by the substrate temperature.
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