Abstract
DC electrical resistivity was studied for Zn x Ni 1- x Fe 2O 4 samples (with x = 0, 0.2, 0.4, 0.6, 0.8 and 1) prepared using the usual ceramic technique as function of temperature T and composition x. The DC electrical resistivity ϱ, Curie temperature T c. and activation energies for electric conduction in ferrimagnetic ( E r) and in paramagnetic ( F p) region decrease as zinc ion substitution increases. The ferrite samples studied have a semiconductor behavior where electrical resistivity ϱ decreases on increasing the temperature. The activation energy for the electric conduction in the paramagnetic region was found to be higher than that in the ferrimagnetic region. The resistivity ϱ increases as porosity increases. A new empirical formula was suggested for composition dependence of electrical resistivity.
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