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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 42: French-German Session: Nanomaterials, Composites and Hybrids II
CPP 42.6: Vortrag
Mittwoch, 11. März 2026, 18:30–18:45, ZEU/0260
Approximate doubling of the magnitude of maximized magnetorheological effects — Lukas Fischer1,2 and •Andreas M. Menzel1 — 1Otto von Guericke University Magdeburg, Magdeburg, Germany — 2The University of Osaka, Osaka, Japan
In its static limit, the magnetorheological effect of magnetic elastomers implies changes of elastic moduli by external magnetic fields. Induced magnetic interactions between magnetizable inclusions in a soft, elastic, polymeric matrix affect the overall mechanical stiffness.
First, we optimized the spatial arrangement of the magnetizable inclusions to achieve the strongest change in overall elastic moduli, either for maximized overall stiffening or softening [1]. We focused on both, Young and shear moduli.
Second, in combination, we simultaneously optimized the structural organization to achieve maximized stiffening when an external magnetic field is applied in one direction, but maximized softening when the field is applied along a perpendicular direction [2]. In our case, switching between these two field directions can approximately double the magnitude in overall change of elastic moduli.
Once experimental realizations of prescribed structuring become possible, our strategy provides a direct route to further extend the potential of the materials.
We acknowledge support by the German Research Foundation DFG through Research Unit FOR 5599 on structured magnetic elastomers.
[1] L. Fischer, A. M. Menzel, PNAS Nexus 3, pgae353 (2024).
[2] L. Fischer, A. M. Menzel, arXiv:2507.22777 (2025).
Keywords: magnetic elastomers; structure; optimization; magnetorheological effect