Study of the deformation of ferrofluid droplets in a magnetic field

Issue		J. Physique Lett. Volume 43, Number 6, mars 1982


Page(s)		179 - 184
DOI		10.1051/jphyslet:01982004306017900

J. Physique Lett. 43, 179-184 (1982)
DOI: 10.1051/jphyslet:01982004306017900

Study of the deformation of ferrofluid droplets in a magnetic field

J.-C. Bacri¹, D. Salin¹ et R. Massart²

¹ Laboratoire d'Ultrasons, Université Pierre et Marie Curie, Tour 13, 4, place Jussieu, 75230 Paris Cedex 05, France
² Laboratoire de Chimie des Métaux de Transition, Université Pierre et Marie Curie, Tour 54, 4, place Jussieu, 75230 Paris Cedex 05, France

Abstract
We have studied the deformation of large magnetic agglomerates (2 to 20 μm) in a weak magnetic field (up to 10 gauss) for a new kind of ferrofluid. The ellipsoid shape of the agglomerate is due to a competition between magnetic energy which favours elongated agglomerates in the field direction and surface energy which favours a spherical shape. We can deduce a value of the interfacial tension of the agglomerates σ = (1.5 ± 0.2). 10-4 erg.cm -2.

Résumé
Nous avons étudié dans un nouveau type de ferrofluide la déformation de gros agglomérats ferromagnétiques (2 à 20 μm) dans un faible champ magnétique (jusqu'à 10 gauss). La forme ellipsoïdale des agglomérats est due à la compétition entre les forces magnétiques qui tendent à aligner les agrégats dans la direction du champ et la tension de surface qui favorise la forme sphérique. Nous déduisons de nos mesures une valeur de la tension interfaciale des agrégats σ = (1,5 ± 0,2). 10 -4 erg.cm-2.

PACS
6810C - Fluid surface energy surface tension, interface tension, angle of contact, etc..
7550M - Magnetic liquids.
8270 - Disperse systems.

Key words
deformation -- drops -- magnetic fluids -- surface energy -- ferrofluid droplets -- deformation -- magnetic agglomerates -- ferrofluid -- surface energy -- interfacial tension

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.