BPCPPDYSOE21 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 14: Poster Session II - Complex Fluids and Perovskites
CPP 14.3: Poster
Dienstag, 23. März 2021, 16:30–18:30, CPPp
Growth and morphology of sputtered iron layers on magnetic nanoparticle-containing diblock copolymer films — •Christopher Everett1, Martina Plank2, Markus Gallei3, Matthias Schwartzkopf4, Stephan Roth4,5, and Peter Müller-Buschbaum1,6 — 1TU München, Physik-Department, LS Funktionelle Materialien, Garching, Germany — 2TU Darmstadt, Ernst-Berl-Institute, Darmstadt, Germany — 3Saarland University, Chair in Polymer Chemistry, Saarbrücken, Germany — 4Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany — 5KTH Royal Institute of Technology, Stockholm, Sweden — 6Heinz Maier-Leibnitz Zentrum (MLZ), TU München, Garching, Germany
For highly functional magnetic sensors and high-density magnetic data storage, the exchange bias effect is of great technical importance. Exchange bias, typically observed at ferromagnetic/antiferromagnetic interfaces, has been reported in a variety of magnetic systems. In this investigation, ultra-high molecular weight polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) films with a large PS volume fraction are used as templates for ferrimagnetic magnetite (Fe3O4) nanoparticles (NPs). Through solvent vapor annealing, nanostructured hybrid films with up to 5 wt % of NPs are obtained. The sputtering of iron (Fe), which is ferromagnetic, on the polymer template is monitored in situ with grazing incidence small-angle X-ray scattering (GISAXS). An analysis reveals that the growth of Fe on nanoparticle-containing diblock copolymer films is a complex process and is important in understanding the resulting magnetic properties.