The effect of texture on Curie-Weiss behaviour in a frozen ferrofluid

Author

Ayoub, N.Y. ; Abu-Aisheh, B. ; Dababneh, M. ; Laham, N. ; Popplewell, J.

Author_Institution

Dept. of Phys., Yarmouk Univ., Irbid, Jordan

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3860

Lastpage

3862

Abstract

The initial susceptibility χ of a textured frozen dilute magnetite (Fe₃O₄) ferrofluid has been measured in the temperature range 80-180 K for different freezing magnetic fields H_f. The texture is induced by cooling the ferrofluid to the solid state in the presence of an H_f of less than 220 Oe. The frozen ferrofluid exhibits Curie-Weiss behaviour. Using these results it is found that χ varies linearly with the square of H_f, which agrees with a theoretical model for a noninteracting textured fine particle system in a solid matrix. It is suggested that the presence of particle aggregates in the ferrofluid can be detected through the study of the ordering temperature

Keywords

iron compounds; magnetic fluids; magnetic properties of dilute systems; magnetic properties of fine particles; magnetic susceptibility; texture; 80 to 180 K; Curie-Weiss behaviour; Fe₃O₄ frozen dilute magnetite ferrofluid; freezing magnetic fields; initial susceptibility; noninteracting textured fine particle system; ordering temperature; particle aggregates; texture; Hafnium; Magnetic anisotropy; Magnetic field measurement; Magnetic susceptibility; Particle measurements; Perpendicular magnetic anisotropy; Q measurement; Saturation magnetization; Temperature distribution; Temperature measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42457

Filename

42457