Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 41: Micro- and Nanostructured Magnetic Materials
MA 41.5: Vortrag
Freitag, 9. September 2022, 12:30–12:45, H47
Cellulose nanocomposite with SrFe12O19 nanoparticles as a novel magnetic nanopaper coating — •Andrei Chumakov1, Korneliya Gordeyeva2, Calvin J. Brett1,2, Anastasia V. Riazanova2, Dirk Menzel3, Daniel Soederberg2, and Stephan V. Roth1,2 — 1DESY, Hamburg, Germany — 2KTH Royal Institute of Technology, Stockholm, Sweden — 3TU Braunschweig, Braunschweig, Germany
The possibility of the coating by a new magnetic nanocomposite based on negatively charged cellulose colloids (1360 µmol/g) and positively charged hard magnetic hexaferrite (SrFe12O19) nanoparticles with a large permanent magnetic moment was demonstrated. Thin nanofilms of magnetic cellulose composite were obtained by spray deposition on a silicon substrate and studied by microscopic imaging, surface-sensitive X-ray scattering, and magnetic determining techniques. Ferromagnetic nanoparticles are uniformly distributed in the cellulose matrix and form a nanocomposite due to the opposite charges of the initial components. Magnetic nanoplates show a predominant orientation parallel to the plane of the substrate and the resulting nanocomposite has the highest intrinsic coercivity field inherent in the properties of individual nanoparticles. Coatings of magnetic nanopaper with a large coercive field can be widely used from catalysis to promising nanoelectronic devices.