Controlling the coarsening dynamics of ferrogranulate networks by means of the filling fraction—Less is more susceptible

Autor(en)

Ali Lakkis, Matthias Biersack, Oksana Bilous, Sofia Kantorovich, Reinhard Richter

Abstrakt

We are exploring in experiments the aggregation process in a shaken granular mixture of glass and magnetized steel beads, filled in a horizontal vessel. After the shaking amplitude is suddenly decreased, the magnetized beads form a transient network that coarsens in time into compact clusters. Here we investigate how an increased volume fraction ϕ of the granulate accelerates the coarsening, whereas a homogeneous magnetic field B⊥ oriented in vertical direction impedes the emergence and growth of the networks. We explore the coarsening dynamics in the (ϕ,B)-control parameter space, and observe that low filling fractions are more susceptible to an increase of B⊥ than high ones.

Organisation(en)

Forschungsplattform MMM Mathematics-Magnetism-Materials, Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Universität Bayreuth

Journal

Journal of Magnetism and Magnetic Materials

Band

589

Anzahl der Seiten

4

ISSN

0304-8853

DOI

https://doi.org/10.1016/j.jmmm.2023.171620

Publikationsdatum

01-2024

Peer-reviewed

Ja

ÖFOS 2012

103017 Magnetismus, 103015 Kondensierte Materie

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/3e629a12-34cb-43ee-a8f7-95b1dd80dc26