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DS: Dünne Schichten

DS 24: Poster presentation

DS 24.67: Poster

Dienstag, 28. März 2006, 15:00–17:30, P2

Interface optimization and templated self-organisation of Ni/Ag — •J. Petersen and S. G. Mayr — I. Physikalisches Institut, University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

The systematic processing of surface or interface structures is of special interest particularly in the field of magnetic recording media and nanotechnology where either smooth or specifically patterned surfaces are required. We investigated the interface modification and structural changes during ion bombardment of Ni/Ag thin film bilayers, as well as the deposition on a prepatterned substrate.

For appropriate fluences the interface roughness of the bilayers shows a local minimum as has previously been observed for surfaces, indicating the interplay of smoothing and roughening effects. The underlying mechanisms are identified as radiation induced viscous flow, which is driven by the interface energy, as well as disordering by ion beam mixing.

We further report about a nanoscale ripple pattern, which is generated by ion bombardment under oblique incidence and is used as a template for the separation process of the immiscible system Ni/Ag.

We acknowledge K. Zhang, II. Physikalisches Institut, University of Göttingen for help with ion irradiation, as well as the SFB 602 TP B3 for financial support.