Hg. Zhang et al., Investigation on permeability-frequency characteristics and microstructureof composite ferrites, J MAGN MAGN, 218(1), 2000, pp. 67-71
The initial permeability in composite ferrites consisting of low-temperatur
e sintering (Ni0.15Cu0.25Zn0.60)Fe2O4 ferrite and Co(2)Z (Ba3Co2Fe24O41) he
xaferrite matrix has been measured from 1 to 1000 MHz. The results reveal t
hat frequency dependence of initial permeability in the composite ferrites
is much different from that of pure (Ni0.15Cu0.25Zn0.60)Fe2O4 spinel or Co(
2)Z hexagonal ferrite. A simple quantitative estimation of permeability for
the composite ferrite materials is proposed and possible magnetic mechanis
ms generating this kind of difference are discussed. (C) 2000 Elsevier Scie
nce B.V. All rights reserved.