Dresden 2011 – scientific programme

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O: Fachverband Oberflächenphysik

O 102: Epitaxy and growth: Metals and semiconductors II

O 102.4: Talk

Friday, March 18, 2011, 12:00–12:15, WIL C307

SPA-LEED investigation of a thin hexagonal iron-oxide-layer on Ag(001) — •Irena Kiesel¹, Daniel Bruns², and Joachim Wollschläger² — ¹Fakultät Physik/DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany — ²Fachbereich Physik, Universität Osnabrück, 49069 Osnabrück, Germany

We present a SPA-LEED (spot-profile-analysis low-energy-electron-diffraction) investigation of a thin iron-oxide-layer on Ag(001). The layer was produced by reactive vapour-deposition of iron in a thin oxygen atmosphere at different substrate temperatures.

The SPA-LEED anaysis of the films produced at 300°C and 400°C has shown a hexagonal structure of the iron-oxide-layer in addition to the cubic structure of the silver-substrate. Accessorily the reflexes of the hexagonal structure split in one direction. The splitting could be explained by an height-modulation of a FeO(111)-film on Ag(001). This height-modulation acts as a phase-grating for the diffracted electrons.