Dresden 2014 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 18: Poster Session

MM 18.8: Poster

Montag, 31. März 2014, 18:00–20:00, P4

Preparation of a Ta(110) surface for hydrogen absorption — •Sebastian Schleicher, Sara Wanjelik, and Mathias Getzlaff — Institut für Angewandte Physik, Universität Düsseldorf, Deutschland

Hydrogen in metals has attracted a lot of attention in the past decades. On the one hand this is caused by the technical application as hydrogen storage. On the other hand metal hydrogen systems are of great interest from a fundamentel point of view. In our study we investigate hydrogen on adsorption and absorption in a Ta(110) crystal which requires careful cleaning as preparation for any measurement on the Tantalum surface. The cleaning procedures include heating up to 2900°C, annealing in an oxygen atmosphere and sputtering with a sputter ion source to remove impurities. The subsequently observed superstructure remains unaffected and may show a reconstructed pattern of a clean Tantalum surface. Measurements are performed by means of scanning tunneling microscopy (STM), low energy electron diffraction (LEED) and Auger electron spectroscopy (AES) under ultrahigh vacuum conditions.