Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 2: Nanoengineered thin films

DS 2.2: Vortrag

Montag, 26. März 2012, 12:45–13:00, H 0111

Local control of molecular glass wrinkling by designed magnetic stray fields — •Henning Huckfeldt, Holger Klein, Florian Ahrend, Thomas Fuhrmann-Lieker, and Arno Ehresmann — Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel

An IrMn/CoFe exchange bias substrate has been patterned into artificial parallel stripe magnetic domains by ion bombardment induced magnetic patterning without topographic elevations. PMMA and CoFe were subsequently deposited on top of the exchange bias layer system. Thermal treatment induced internal stress in the viscoelastic/metallic layer combination, which relaxes by wrinkling.

The interaction of the local stray fields emerging from the domain walls between the artificial domains with the CoFe layer on top of the organic PMMA layer, leads to a directional wrinkling parallel and perpendicular to the magnetic domain walls of the substrate. A qualitative model has been developed to explain the observed local alignment of the wrinkles.