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SKM 2021 – scientific programme

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MA: Fachverband Magnetismus

MA 3: Posters Magnetism I

MA 3.19: Poster

Monday, September 27, 2021, 13:30–16:30, P

Spray deposition of ferromagnetic SrFe12O19 nanoplates colloid at Si and cellulose substrate — •Andrei Chumakov1, Calvin Brett1,2, Artem Eliseev3, Evgeny Anokhin3, Lev Trusov3, Lewis Akinsinde4, Marc Gensch1,5, Dirk Menzel6, Matthias Schwartzkopf1, Wei Cao5, Shanshan Yin5, Manuel Scheel5, Micheal Rübhausen4, Peter Müller-Buschbaum5,7, Daniel Soederberg2, Andrei Eliseev3, and Stephan V. Roth1,21DESY, Hamburg, Germany — 2KTH RIT, Stockholm, Sweden — 3MSU, Moscow, Russia — 4CFEL, Universität Hamburg, Hamburg, Germany — 5TU München, Garching, Germany — 6TU Braunschweig, Braunschweig, Germany — 7TU München, MLZ, Garching, Germany

Ferromagnetic SrFe12O19 nanoparticles with a hard magnetic moment perpendicular to their plane and stabilized by a positive charge can form a self-ordered coating under the influence of magnetic fields drying from dispersion. We investigated the film formation of a stable colloid dispersion of ferromagnetic nanoplates and nanoblocks onto a silicon substrate and cellulose nanofilm without and under the action of an external magnetic field during scalable layer-by-layer spraying. The formation of a film of ferromagnetic particles from an aqueous colloid makes it possible to form a stable magnetic coating of agglomerates of nanoparticles. An external magnetic field in the deposition process leads to the appearance of residual magnetization in the film. Particles with a smaller aspect ratio form a periodic structure of agglomerates of nanoparticles with signs of an artificial opal-like structure.

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