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O: Fachverband Oberflächenphysik

O 90: Semiconductor Substrates

O 90.1: Talk

Friday, March 15, 2013, 10:30–10:45, H45

Growth Study of Thin MgO Films on Fe(001) — •Hendrik Ronneburg, Stefanie Stuckenholz, Christin Büchner, Markus Heyde, and Hans-Joachim Freund — Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany

The electronic structure and morphology of oxide surfaces are of crucial importance for their reaction behaviour. A detailed understanding of the structure-reactivity relationship is desired for the studies in heterogeneous catalysis.

We use noncontact atomic force microscopy (nc-AFM) and scanning tunneling microscopy (STM) to study model catalysts, namely metal supported thin oxide film systems.

Thin MgO films can be grown on different metal substrates, e.g. Mo(001), Ag(001) or Fe(001). MgO films grown on Mo(001) and on Ag(001) have been studied in detail by scanning probe methods [1, 2]. The electronic structure and morpholgy of the oxide film is altered by the substrate. To further investigate this support influence on the properties of thin oxide films our present studies focus on the system of MgO grown on Fe(001).

Here we present preliminary results from our growth study of thin MgO films on Fe(100).

[1] S. Benedetti, et al., Chem. Phys. Lett. 430, 330 (2006)

[2] T. König, et al., J. Phys. Chem. C 113, 11201 (2009)