A NEW SPECTROMETRIC METHOD, USING A MAGNETOOPTICAL EFFECT, TO STUDY MAGNETIC LIQUIDS

Authors
DELAUNAY L NEVEU S NOYEL G MONIN J
Citation
L. Delaunay et al., A NEW SPECTROMETRIC METHOD, USING A MAGNETOOPTICAL EFFECT, TO STUDY MAGNETIC LIQUIDS, Journal of magnetism and magnetic materials, 149(3), 1995, pp. 239-245
Citations number
22
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
149
Issue
3
Year of publication
1995
Pages
239 - 245
Database
ISI
SICI code
0304-8853(1995)149:3<239:ANSMUA>2.0.ZU;2-P
Abstract
We present an original polarimetric method to study the magnetic relax ation of ferrofluids. The Brownian relaxation of three ferrofluids wit h Fe2CoO4 particles dispersed in water, dibutyl phthalate and diethyle ne glycol is presented and compared with the theoretical model of Deby e adapted to the magnetism. The results show that this system has a go od sensitivity even at low volume concentration of particles and under low ac magnetic field. The analysis of the relaxation parameters lead s to a good estimation of particles diameter and put in evidence a dis tribution of relaxation time.