Fluidization Induced by Magnetic Interactions in Confined Active Matter

Physical review. E 2026 Open access

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Authors: Marco Musacchio, Markus Felber, Matteo Paoluzzi, Andrea Gnoli, Andrea Puglisi, Luca Angelani
DOI: 10.1103/hylm-ljlf
Cited by: 1
References: 41

Abstract

We investigate magnetic active matter in confined geometries using both experiments with magnetic toy robots, Hexbugs, and simulations of elongated magnetic active Brownian particles in circular domains. Standard active particles tend to accumulate at boundaries, forming clusters even at relatively low densities. In the presence of magnetic interactions, we provide evidence for a effect that inhibits clustering and shifts its onset to higher packing fractions. Moreover, magnetic dipolar interactions give rise to collective behaviors such as train-like formations, rotating pairs, and rotating clusters.

Fields of Study & Subjects

Characterization and Applications of Magnetic Nanoparticles Geomagnetism and Paleomagnetism Studies Micro and Nano Robotics

Publication details

Journal / source
Physical review. E
Publisher
American Physical Society (APS)
Volume
113
Issue
5
Publication date
30 April 2026
Language
EN