Berlin 2015 – scientific programme

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MA: Fachverband Magnetismus

MA 4: Micro- and Nanostructured Materials

MA 4.6: Talk

Monday, March 16, 2015, 11:00–11:15, H 1012

Magnetic nanostructure patterns via hierarchical self-assembly: An in-situ study combining GISAXS and NRS — •Denise Erb, Kai Schlage, Hans-Christian Wille, and Ralf Röhlsberger — Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany

Nanopatterning via self-assembly has gained considerable interest as an alternative to lithography-based techniques for nanostructure fabrication. We propose a routine for preparing highly ordered metallic nanostructure arrays based exclusively on self-assembly processes: crystal surface reconstruction, copolymer microphase separation, metal diffusion on heterogeneous surfaces. The versatile routine allows fabricating nanostructures in a variety of shapes and sizes. We present results of in-situ structural and magnetic investigations of Fe nanodot arrays during formation by Grazing Incidence Small Angle X-ray Scattering (GISAXS)[1] and Nuclear Resonant Scattering of synchrotron radiation (NRS) [2], examining the dependence of nanodot morphology on deposition conditions and the evolution of magnetic moment dynamics during nanodot growth [3].

[1] G. Renaud, R. Lazzari, and F. Leroy, Surface Science Reports 64 (2009) 255

[2] R. Röhlsberger, Nuclear Condensed Matter Physics with Synchrotron Radiation, Springer Tracts in Modern Physics 208 (2004)

[3] D. Erb, Ph.D. thesis, University of Hamburg, submitted (2014)