SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 5: Thin Films: Magnetic Coupling Phenomena / Exchange Bias

MA 5.4: Vortrag

Montag, 27. März 2023, 10:15–10:30, POT 6

Sprayed Nanometer-Thick Hard Magnetic Coatings with Strong Perpendicular Anisotropy for Data-Storage Applications — •Andrei Chumakov¹, Calvin J. Brett^{1, 2}, Korneliya Gordeyeva², Dirk Menzel³, Lewis O. O. Akinsinde⁴, Marc Gensch¹, Matthias Schwartzkopf¹, Wei Cao⁵, Shanshan Yin⁵, Manuel A. Reus⁵, Michael A. Rübhausen⁴, Peter Müller-Buschbaum^{5, 6}, Daniel Söderberg², and Stephan V. Roth^{1, 2} — ¹Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — ²DE 118714904 — ³Notkestraße 85, DESY — ⁴Universität Hamburg, Hamburg, Germany — ⁵Technische Universität München, Garching, Germany — ⁶Heinz Maier-Leibnitz Zentrum, Garching, Germany

We present a study of a facile technology for establishing mono- and multi-layer surfaces from various single-domain flat magnetic nanoparticles that exhibit a strong perpendicular-oriented magnetic moment on solid and flexible substrates. Surfactant-free, hard ferromagnetic and single-domain anisotropic strontium hexaferrite nanoparticles with perpendicular magnetic moment orientation and two different aspect ratios are self-ordered into magnetic thin nanofilms exploiting the templating effect of cellulose nanofibrils and magnetic fields. Uniform magnetic coatings obtained by scalable layer-by-layer spray deposition from a monolayer coverage up to thicknesses of a few tens of nanometers show preferred in-plane orientation of the hard-magnetic nanoparticles.