Reference : Ribbons of superparamagnetic colloids in magnetic field
Scientific congresses and symposiums : Unpublished conference/Abstract
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/209917
Ribbons of superparamagnetic colloids in magnetic field
English
Darras, Alexis mailto [Université de Liège > Département de physique > Physique expér. de la matière molle et des syst. complexes >]
Fiscina, Jorge [Saarland University > Experimental Physics > Christian Wagner AG > >]
Pakpour, Maryam [Université de Liège - ULiège > Physique > Group for Research and Applications in Statistical Physics > >]
Vandewalle, Nicolas mailto [Université de Liège > Département de physique > Physique statistique >]
Lumay, Geoffroy mailto [Université de Liège > Département de physique > Physique expér. de la matière molle et des syst. complexes >]
Mar-2017
http://meetings.aps.org/Meeting/MAR17/Content/3284
No
No
International
APS March Meeting 2017
from 13-03-2017 to 17-03-2017
American Physical Society
New Orleans
Louisiana, USA
[en] colloids ; magnetism ; self-assembly
[en] While the aggregation process of superparamagnetic colloids in strong magnetic eld is well
known on short time since a few decades, recent theoretical works predicted an equilibrium state reached after a long time. In this talk, we present experimental observations of this equilibrium state with a twodimensional system and we compare our data with the predictions of a pre-existing model. Above a critical aggregation size, a deviation between the model and the experimental data is observed. This deviation is explained by the formation of ribbon-shaped aggregates. The ribbons are formed due to lateral aggregation of chains. An estimation of the magnetic energy for chains and ribbons shows that ribbons are stable structures when the number of magnetic grains is higher than N=30.
Group for Research and Applications in Statistical Physics-GRASP
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Université de Liège
Researchers
http://hdl.handle.net/2268/209917

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