6533b837fe1ef96bd12a309b
RESEARCH PRODUCT
Relaxation of the field-induced structural anisotropy in a rotating magnetic fluid
Régine PerzynskiEmmanuelle DuboisElie WandersmanFabrice CousinAndrejs CēbersVincent DupuisGuillaume Mériguetsubject
PhysicsCondensed matter physicsField (physics)business.industryRelaxation (NMR)General Physics and AstronomyNanoparticleAngular velocitySmall-angle neutron scatteringOpticsDistortionDiffusion (business)businessAnisotropydescription
The relaxation of field-induced anisotropy in a magnetic fluid with dominant repulsion is theoretically modeled and experimentally measured by small angle neutron scattering on a sample rotating at angular velocity ω. The scattered pattern distortion scales as the Mason number Mn=ω·τq, τq being the q-dependent diffusion time of nanoparticles. The model accounts for the magnetophoretical drift in the non-homogeneous self-magnetic field of the assembly, continuously created by the thermal noise. The Mn-dependence of the pattern distortion is well described without any adjustable parameter.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-04-01 | EPL (Europhysics Letters) |