Magnetization reversal mechanisms in colloidal dispersions of magnetite particles

Author

Gonzalez, J.M. ; Montero, M.I. ; Perez, J. A Lopez ; Mira, J. ; Lopez-Quintela, M.A. ; Rivas, J. ; Batllé, X. ; Labarta, A.

Author_Institution

Inst. de Ciencia de Mater., CSIC, Madrid, Spain

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

2114

Lastpage

2116

Abstract

We have studied the structural and magnetic properties of colloids consisting of different concentrations of magnetite particles dispersed in kerosene. Our data for the temperature dependence of the low field magnetization and the saturation coercive force of the samples evidenced the occurrence, in different temperature ranges, of Neel- and Brown-type relaxation processes whose characteristics were largely influenced by strong dipolar interparticle interactions

Keywords

coercive force; iron compounds; magnetic fluids; magnetic particles; magnetic relaxation; magnetisation reversal; Brown-type relaxation; Fe₃O₄; Neel-type relaxation; colloidal dispersion; dipolar interaction; kerosene; magnetic properties; magnetite particles; magnetization reversal; saturation coercive force; structural properties; temperature dependence; Coercive force; Magnetic devices; Magnetic field measurement; Magnetic materials; Magnetic properties; Magnetization reversal; Nanoparticles; Saturation magnetization; Temperature dependence; Temperature distribution;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706820

Filename

706820