Abstract
Electrical conductivity of cerium substituted Mn–Zn ferrites have been investigated as a function composition and temperature. Mn–Zn–Ce ferrite with x=0.4 is found to possess minimum electrical conductivity and lowest Seebeck coefficient. Plots of log ( σT) vs. 10 3/ T are almost linear and have shown a transition near the Curie temperature except in the case of Mn 0.58Zn 0.37Ce 1.0Fe 1.05O 4. The activation energy in the ferrimagnetic region is in general less than that in the paramagnetic region. An attempt is made to explain the conduction mechanism in Mn–Zn–Ce ferrites.
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