Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DY: Fachverband Dynamik und Statistische Physik

DY 44: Poster: Active Matter, Soft Matter, and Fluids

DY 44.22: Poster

Mittwoch, 11. März 2026, 15:00–18:00, P5

Computer simulation of the dynamic susceptibility of ellipsoidal multicore particles: the effect of inter-core interaction — •Vladimir Zverev¹, Ekaterina Novak¹, Andrey Kuznetzov², and Sofia Kantorovich² — ¹Ekaterinburg, Russia — ²University of Vienna, Vienna, Austria

This report presents a study of the magnetic dynamic susceptibility of MNPs under the influence of a low-amplitude alternating plane-polarized magnetic field. We consider ellipsoidal MNPs modeled as a collection of spherical subparticles with fixed spatial positions relative to each other. This corresponds to a scenario where nanoparticles are embedded in a polymer or other rigid non-magnetic matrix. The modeling employs the molecular dynamics simulations using the ESPResSo software package, which accounts for magnetic anisotropy. The model is based on the concept proposed in [1]. The core idea is that the orientation of the magnetic moment in a subparticle is determined by solving the stochastic Landau-Lifshitz-Gilbert equation in a reference frame fixed to the particle body, neglecting precession and the Barnett effect. To form a single-domain-like particle assembly, their common convex hull approximates an elongated ellipsoid of revolution with a preset aspect ratio, enabling comparison with spherical particles.

The work was financially supported by the Russian Science Foundation grant No. 25-22-00338.

[1] Pyanzina E. S. et al. Dynamic Magnetic Response of Multicore Particles: The Role of Grain Magnetic Anisotropy and Intergrain Interactions //Journal of Molecular Liquids. - 2025. - P.126842.

Keywords: Computer simulation; dynamic susceptibility; ellipsoidal multicore particles