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          Institute: Fritz-Haber-Institut     Collection: Theory     Display Documents



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ID: 504871.0, Fritz-Haber-Institut / Theory
Equilibrium structure of ferrofluid aggregates
Authors:Yoon, Mina; Tománek, David
Language:English
Date of Publication (YYYY-MM-DD):2010-10-28
Title of Journal:Journal of Physics: Condensed Matter
Journal Abbrev.:J. Phys.: Condens. Matter
Volume:22
Start Page:455105-1
End Page:455105-6
Copyright:IOP Publishing Ltd 1 Printed in the UK & the USA
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We study the equilibrium structure of large but finite aggregates of magnetic dipoles,
representing a colloidal suspension of magnetite particles in a ferrofluid. With increasing
system size, the structural motif evolves from chains and rings to multi-chain and multi-ring
assemblies. Very large systems form single- and multi-wall coils, tubes and scrolls. These
structural changes result from a competition between various energy terms, which can be
approximated analytically within a continuum model. We also study the effect of external
parameters such as magnetic field on the relative stability of these structures. Our results may
give insight into experimental data obtained during solidification of ferrofluid aggregates at
temperatures where thermal fluctuations become negligible in comparison to inter-particle
interactions. These data may also help to experimentally control the aggregation of magnetic
particles.
External Publication Status:published
Document Type:Article
Communicated by:Matthias Scheffler
Affiliations:Fritz-Haber-Institut/Theory
External Affiliations:Physics and Astronomy Department, Michigan State University, East Lansing, MI 48824-2320, USA
Identifiers:DOI:10.1088/0953-8984/22/45/455105 [only subscriber]
URL:http://www.fhi-berlin.mpg.de/th/ [For a reprint please contact THsecretary@fhi-berlin.mpg.de]
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