AC and DC magnetic measurements on colloidal suspensions of Co particles

Broadband measurements of the complex magnetic susceptibility, χ(ω) = χ′(ω) − iχ′(ω) are reported for a colloidal suspension of Co particles. Resonant and relaxation mechanisms are identified and from polarised measurements a value of magnetic anisotropy constant, K, is determined and compared with...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1999-05, Vol.196, p.586-588
Main Authors: Fannin, P.C., Charles, S.W.
Format: Article
Language:English
Subjects:
Complex susceptibility
Magnetic fluids
Resonance and relaxation
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Summary:Broadband measurements of the complex magnetic susceptibility, χ(ω) = χ′(ω) − iχ′(ω) are reported for a colloidal suspension of Co particles. Resonant and relaxation mechanisms are identified and from polarised measurements a value of magnetic anisotropy constant, K, is determined and compared with that obtained from DC measurements of the remanence at 80 K of solidified colloidal suspensions.
ISSN:0304-8853
DOI:10.1016/S0304-8853(98)00847-6