Permeability spectra of Co substituted Ni ferrites

The authors present test results on preparing a set of Co-substituted Ni ferrites Ni/sub 1-x/Co/sub x/Fe/sub 2/O/sub 4/ (x=0.04 to 0.25) as a material which absorbs electromagnetic wave energy at the X band. A novel method of determining the dependence of the microwave complex permeability on the frequency is described briefly.<
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