Frequency dependence initial permeability spectra of
Mn0.20Zn0.50Cu0.30Fe2O4 synthesized by auto combustion method have
been investigated. The X-ray diffraction patterns of this composition
indicated that the sample possesses single phase cubic spinel
structure. Sintering temperature (Ts) significantly affect on densification,
grain growth and initial permeability of the samples. The grain size (D),
bulk density ( B ), initial permeability (μ/
i) increases with increase in
sintering temperature. The average grain size varied from 53-97
μm.The initial permeability strongly depends on average grain size,
density and intragranular porosity. The real part of initial permeability
increases from 799 to ~1100. The ferrite sample with higher initial
permeability has a relatively lower resonance frequency obeying the
Snoek’s relation.
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