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Dielectric relaxation of chained ferrofluids

TitleDielectric relaxation of chained ferrofluids
Publication TypeJournal Article
Year of Publication2002
AuthorsMurashov, VV, Camp, PJ, Patey, GN
JournalJournal of Chemical Physics
Volume116
Pagination6731-6737
Date PublishedApr
Type of ArticleArticle
ISBN Number0021-9606
KeywordsFLUIDS, PHASE, SCATTERING, SIMULATION, SPHERES
Abstract

Molecular and Brownian dynamics simulations are used to investigate the frequency-dependent dielectric relaxation of ferrofluids, with the objective of identifying features characteristic of dipolar chain formation at low densities. It is shown that the presence of chains gives rise to a high frequency band associated with the vibrational motion of dipoles within the chains. This band serves as a "signature" of association and is not present in dipolar fluids at higher, liquid-like densities. A simple theory that traps the basic features of the relaxation behavior is also presented. (C) 2002 American Institute of Physics.

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