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STUDY OF THE INTERPARTICLE MAGNETIC INTERACTION EFFECT ON MAGNETIC RESONANCE LINE IN FERROFLUIDS

C. N. Marin1, I. Malaescu1,* , V. Socoliuc2

Affiliation

  1. West University of Timisoara, Faculty of Physics, Bul. V. Parvan No. 4, 1900 Timi oara, Romania
  2. National Institute for Research and Development in Electrochemistry and Condensed Matter, Str. Tîrnava No. 1, 1900 Timisoara, Romania

Abstract

The dipolar magnetic interaction effect on magnetic resonance line in ferrofluids is analyzed. Starting from a ferrofluid with magnetite particles dispersed in kerosene and stabilized with oleic acid, three samples were obtained by successive dilution with kerosene. Magnetic resonance and light scattering measurements were performed for each sample of ferrofluid. The experimental results revealed that the resonance line has a two-line feature for all samples, the magnetic field at resonance slowly increases and the magnetic resonance linewidth decreases by dilution of the samples. In accordance with the light scattering measurements, this behaviour is interpreted as a magnetic interparticle interaction and particle agglomeration effect..

Keywords

Ferrofluid, Ferrimagnetic resonance, Particle agglomeration.

Submitted at: Aug. 2, 2002
Accepted at: March 12, 2003

Citation

C. N. Marin, I. Malaescu, V. Socoliuc, STUDY OF THE INTERPARTICLE MAGNETIC INTERACTION EFFECT ON MAGNETIC RESONANCE LINE IN FERROFLUIDS, Journal of Optoelectronics and Advanced Materials Vol. 5, Iss. 1, pp. 227-231 (2003)