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PERTURBATIONAL STATISTICAL THEORIES OF MAGNETIC FLUIDS

L. B. Popescu1,* , V. Socoliuc1

Affiliation

  1. National Institute for Research and Development in Electrochemistry and Condensed Matter; P. Andronescu #1, Timisoara 300224, Romania

Abstract

The theories that account for the colloidal structure of a magnetic fluid give far better results than the gas-type or mean-field models. We show this by using standard perturbative approaches of colloidal science and expressing the magnetization M(H) and the initial magnetic susceptibility c as Taylor series about the Langevin values ML(H) and L c. One of the methods surveyed enables the structural study of the ferrocolloid through the analysis of the pair distribution function. We give a polar plot of this object when an external magnetic field H is present, showing the effect it has on the otherwise isotropic suspension..

Keywords

Magnetization of a ferrocolloid, Virial series and HTA, Pair distribution function, Field induced anisotropy.

Submitted at: Aug. 25, 2005
Accepted at: Nov. 24, 2005

Citation

L. B. Popescu, V. Socoliuc, PERTURBATIONAL STATISTICAL THEORIES OF MAGNETIC FLUIDS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 6, pp. 3075-3082 (2005)