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TT: Fachverband Tiefe Temperaturen

TT 20: Correlated Electrons - Poster Session

TT 20.39: Poster

Mittwoch, 28. März 2007, 14:00–17:45, Poster A

Initial stages of growth of the strongly correlated Fe₃O₄ thin films — •Stefan Klein¹, Chun Fu Chang¹, Zhiwei Hu¹, Philipp Hansmann¹, Hong-Ji Lin², Chien-Te Chen², and Liu Hao Tjeng¹ — ¹II. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln — ²National Synchrotron Radiation Research Center,101 Hsin-Ann Road, Hsinchu 30076, Taiwan

We have investigated the initial stages of growth of the polar Fe₃O₄(001) thin films using reflection high-energy electron diffraction, low-energy electron diffraction and soft X-ray absorption spectroscopy (XAS). A series of epitaxial thin films with varying thicknesses were grown by molecular-beam epitaxy in O₂ atmosphere on MgO(001) substrates. From the analysis of the XAS spectra, we established a model for the growth process. Furthermore, the surface reconstruction of Fe₃O₄(001) will also be discussed. Supported by the DFG through SFB 608.