Dynamic properties of colloidal suspensions of manganese ferrite particles

Author

Fannin, P.C. ; Charles, S.W.

Author_Institution

Dept. of Electron. & Electr. Eng., Trinity Coll., Dublin, Ireland

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

4251

Lastpage

4253

Abstract

Measurement of the magnetic field dependence of the complex susceptibility, χ(ω)=χ\´(ω)-iχ"(ω), of four colloidal suspension of Mn_xFe_1-xFe₂O ₄ particles in isopar M has enabled the dependence on x of anisotropy constant, K, internal field, H_A, magnetogyric ratio, γ, and resonant frequency, f_res, to be determined. For x having values of 0.1, 0.3, 0.5 and 0.7, H_A has average values of 40, 35, 40 and 49 kA m^-1, whilst γ has corresponding values of 2.36, 2.48, 2.43 and 2.4 10⁵ s^-1 A^-1 m, respectively

Keywords

ferrites; magnetic anisotropy; magnetic fluids; magnetic susceptibility; manganese compounds; spin dynamics; Mn_xFe_1-xFe₂O₄ particles; MnFeFe₂O₄; anisotropy constant; colloidal suspensions; dynamic properties; internal field; isopar M; magnetic field dependence measurement; magnetogyric ratio; manganese ferrite particles; resonant frequency; Anisotropic magnetoresistance; Ferrites; Frequency measurement; Iron; Magnetic anisotropy; Magnetic field measurement; Magnetic susceptibility; Manganese; Particle measurements; Suspensions;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619726

Filename

619726