Influence of particle size distribution on the initial susceptibility of magnetic fluids in the Brown relaxation range

We present experimental results on magnetic liquids characterised by a size distribution of particles. The initial complex susceptibility has been studied in the Brown relaxation range using a polarimetric method. The position and the shape of the relaxation peak allow to determine apparent values o...

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Veröffentlicht in:Journal of magnetism and magnetic materials 1998-07, Vol.186 (1), p.168-174
Hauptverfasser: Payet, B, Vincent, D, Delaunay, L, Noyel, G
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container_title Journal of magnetism and magnetic materials
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creator Payet, B
Vincent, D
Delaunay, L
Noyel, G
description We present experimental results on magnetic liquids characterised by a size distribution of particles. The initial complex susceptibility has been studied in the Brown relaxation range using a polarimetric method. The position and the shape of the relaxation peak allow to determine apparent values of hydrodynamic mean diameter and its standard deviation. Theoretical calculations were made from the Debye model including the size distribution of particles and the experimental study shows its influence and the necessity to take it into account for a better results exploitation. In these conditions, the Debye model used gives excellent results in accordance with the experimental points.
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subjects Brown relaxation
Chemistry
Colloidal state and disperse state
Engineering Sciences
Exact sciences and technology
General and physical chemistry
Magnetic fluids
Other
Particle size distribution
Physical and chemical studies. Granulometry. Electrokinetic phenomena
title Influence of particle size distribution on the initial susceptibility of magnetic fluids in the Brown relaxation range
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