Berlin 2024 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 25: Active Matter III (joint session DY/BP/CPP)

DY 25.11: Vortrag

Mittwoch, 20. März 2024, 12:30–12:45, BH-N 334

Optimising transport of active magnetic particles with finite internal magnetic anisotropy — Andrey Kuznetsov¹, Ekaterina Novak², Vladimir Zverev², Tatyana Belyaeva², and •Sofia Kantorovich¹ — ¹University of Vienna, Vienna, Austria — ²Ekaterinburg, Russia

In recent years, we have observed a rapid development in synthesis techniques that opens up new avenues for tailoring magnetic nanoparticles, including their size, shape, and internal anisotropy. The concept of creating magnetically controllable colloids with finely tuneable rheological properties on the nano- or micro-scale has sparked significant experimental and theoretical efforts but remains not fully realised. In this contribution, we employ molecular dynamics computer simulations to investigate the interplay between internal particle magnetic relaxation dynamics and particle self-propulsion. Our findings demonstrate that optimal transport can be achieved by selecting the strength of an applied magnetic field based on the particle's material and size. This, in turn, opens up an avenue for active magnetic particle sorting.

Keywords: active magnetic particles; finite magnetic anisotropy; magnetic field; directional transport