Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 37: Poster II: Focused electron beam induced processing for the fabrication of nanostructures (focused session, jointly with O); Nanoengineered thin films; Layer properties: electrical, optical, and mechanical properties; Thin film characterization: structure analysis and composition (XRD, TEM, XPS, SIMS, RBS,..); Application of thin films

DS 37.35: Poster

Donnerstag, 29. März 2012, 15:00–17:00, Poster E

STM studies of epitaxial grown iron films on MgO(001) — •Christian Otte, Martin Suendorf, and Joachim Wollschläger — Barbarastr. 7, 49076 Osnabrück

Due to their electric and magnetic properties, ultra thin iron films are a considerable candidate for spintronic applications. Therefore, ultra thin epitaxial grown iron films were prepared on MgO(001) under UHV conditions and investigated using Scanning Tunneling Microscopy. Au contatcs were applied to the substrate via Molecular Beam Epitaxy (MBE) prior to film depostition in order to provide electrical contact to the film. The films were deposited by MBE using different depostition rates and substrate temperatures.

A strong depency between the growth of the films and the substrate temperature was observed which results in different kinds of growth mode, island shape and island size. A transition from Volmer-Weber-growth to Frank-van der Merve growth was observed with increasing substrate temperature.