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 Brett^1,2, Artem Eliseev³, Evgeny Anokhin³, Lev Trusov³, Lewis Akinsinde⁴, Marc Gensch^1,5, Dirk Menzel⁶, Matthias Schwartzkopf¹, Wei Cao⁵, Shanshan Yin⁵, Manuel Scheel⁵, Micheal Rübhausen⁴, Peter Müller-Buschbaum^5,7, Daniel Soederberg², Andrei Eliseev³, and Stephan V. Roth^1,2 — ¹DESY, 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.