Unpublished conference/Abstract (Scientific congresses and symposiums)
Ribbons of superparamagnetic colloids in magnetic field
Darras, Alexis; Fiscina, Jorge; Pakpour, Maryam et al.
2017APS March Meeting 2017
 

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Keywords :
colloids; magnetism; self-assembly
Abstract :
[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.
Research center :
Group for Research and Applications in Statistical Physics-GRASP
Disciplines :
Physics
Author, co-author :
Darras, Alexis ;  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  ;  Université de Liège > Département de physique > Physique statistique
Lumay, Geoffroy ;  Université de Liège > Département de physique > Physique expér. de la matière molle et des syst. complexes
Language :
English
Title :
Ribbons of superparamagnetic colloids in magnetic field
Publication date :
March 2017
Event name :
APS March Meeting 2017
Event organizer :
American Physical Society
Event place :
New Orleans, United States - Louisiana
Event date :
from 13-03-2017 to 17-03-2017
Audience :
International
References of the abstract :
http://meetings.aps.org/Meeting/MAR17/Content/3284
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
ULiège - Université de Liège [BE]
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since 25 April 2017

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