Berlin 2012 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 17: Poster Session

MM 17.36: Poster

Monday, March 26, 2012, 17:00–19:00, Poster B

Surface changes of defect-rich Palladium films under hydrogen atmosphere — •Marc Waninger and Astrid Pundt — Instiute of Material physics, University of Goettingen Friedrich-Hund-Platz 1, D-37077 Goettingen, Germany.

Because of the large out-of-plane expansion of thin films during hydride formation, phase transformation can be studied by surface analyses.[1] In this paper, we artificially generate surface-defects and study their influence on hydride formation by means of atom force microscopy (AFM).

200 nm Palladium films, prepared by ion-argon-beam sputtering at room temperature, are indented by an AFM Cantilever using different loads. Thereby, indentation craters of different size and shape are generated. Subsequent surface changes during hydrogen loading are studied by performing AFM measurements in a gas loading setup.

This research is kindly supported by SFB602, B12 and DFG PU131/9.

[1] K. Nörthemann and A. Pundt, Phys. Rev. B 78, 014105 (2008), Phys. Rev. B 83, 155420 (2011)