Work

Patterns of active dipolar particles in external magnetic fields

Year: 2025

Type: article

Abstract: Active particles with a (magnetic) dipole moment are of interest for steering self-propelled motion but also result in novel collective effects due to their dipole-dipole interaction. Here systems of active dipolar particles are studied with Brownian dynamics simulations to systematically characterize the different patterns they form, specifically in the presence of an external (magnetic) field. The combination of three types of order-clustering, orientational alignment, and chain formation-is used to classify the patterns observed in these systems. In the presence of an external field, oriented chains and bands are found to be dominant. These structures show some similarities with columnar cluster seen in (passive) ferrofluids and display columnar spacing and number of lanes per cluster that both decrease with increasing field strength.

Source: Physical review. E

DOI: 10.1103/836q-7vng

Authors: Vitali Telezki, Stefan Klumpp

Institution: University of Göttingen

Language: English

Topic: Micro and Nano Robotics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Deutsche Forschungsgemeinschaft, Niedersächsisches Ministerium für Wissenschaft und Kultur

Awards: Erweiterung eines bestehenden Rechenclusters um mehrere Compute Server, MagnetoAerotaxis bei magnetotaktischen Bakterien, GoeGRIDErweiterung, Magnetotaktische Navigation in komplexen Umgebungen, G6124375792