Author_Institution :
Dept. of Electron. & Electr. Eng., Trinity Coll., Dublin, Ireland
Abstract :
Measurement of the magnetic field dependence of the complex susceptibility, χ(ω)=χ\´(ω)-iχ"(ω), of four colloidal suspension of MnxFe1-xFe2O 4 particles in isopar M has enabled the dependence on x of anisotropy constant, K, internal field, HA, magnetogyric ratio, γ, and resonant frequency, fres, to be determined. For x having values of 0.1, 0.3, 0.5 and 0.7, HA 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; MnxFe1-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;
