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THE APPLICATION OF PERTURBATIONAL STATISTICAL THEORIES TO THE INVESTIGATION OF THE STATIC MAGNETIZATION OF MAGNETIC FLUIDS

L. B. Popescu1,* , V. Socoliuc2, D. Bica1, L. Vekas1

Affiliation

  1. Center for Fundamental and Advanced Technical Research, Romanian Academy Bd. Mihai Viteazul 24, Timisoara 300223, Romania
  2. Institute for Space Sciences, Atomistilor 409,Magurele 077125,Romania

Abstract

Nonlinear dependence of the static magnetization on the sample concentration was experimentally found at concentrations above 1% for two ferrofluids with different degree of steric stabilization. The nonlinearity was found to be more pronounced in the case of the less stabilized ferrofluid. The processing with a ferrofluid magnetization model based on the method of perturbations of the pair distribution function was found to give an accurate qualitative description of the experimental data and fairly good quantitative values of the mean magnetic diameter of the particles by comparison with the value estimated from electron microscopy..

Keywords

Ferrofluid, Perturbational statistical theory, Magnetic nanoparticle.

Submitted at: Aug. 18, 2004
Accepted at: March 23, 2005

Citation

L. B. Popescu, V. Socoliuc, D. Bica, L. Vekas, THE APPLICATION OF PERTURBATIONAL STATISTICAL THEORIES TO THE INVESTIGATION OF THE STATIC MAGNETIZATION OF MAGNETIC FLUIDS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 2, pp. 753-757 (2005)