SKM 2021 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: Poster Session III

CPP 8.25: Poster

Mittwoch, 29. September 2021, 17:30–19:30, P

Spray-deposited anisotropic ferromagnetic hybrid polymer films of PS-b-PMMA and strontium hexaferrite magnetic nanoplatelets — •Wei Cao1, Shanshan Yin1, Andrei Chumakov2, Matthias Opel3, Markus Gallei4, Matthias Schwartzkopf2, Stephan V. Roth2,5, and Peter Müller-Buschbaum1,61TU München, Physik-Department, 85748 Garching — 2DESY, 22607 Hamburg — 3WMI, Bayerische Akademie der Wissenschaften, 85748 Garching — 4Saarland University, Chair in Polymer Chemistry, 66123 Saarbrücken — 5KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, 44 Stockholm, Sweden — 6TU München, MLZ, 85748 Garching

Spray deposition is applied to fabricate anisotropic ferromagnetic hybrid polymer films by controlling the orientation of strontium hexaferrite nanoplatelets inside ultrahigh molecular weight diblock copolymer (DBC) polystyrene-block-poly(methyl methacrylate) films. During spray deposition, the kinetics of structure evolution of the hybrid film is monitored in situ with grazing-incidence small-angle X-ray scattering. The obtained final hybrid film is then solvent annealed inside a closed chamber with tetrahydrofuran to study the influence of solvent vapor annealing (SVA). Due to the rearrangement of the nanoplatelets inside the DBC during SVA, an obvious change in the magnetic behavior of the hybrid film is observed. The hybrid film shows a perpendicular ferromagnetic anisotropy before SVA, which is strongly weakened after SVA. The spray deposited hybrid film appears highly promising for potential applications in magnetic data storage and sensors.

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