INITIAL PERMEABILITY AND DC CONDUCTIVITY OF CU – ZN FERRITE

Abstract

The initial permeability and dc conductivity as a function of
temperature ranges from 300K to 800K are measured for Cu1-sZnsFe2O4
compounds. This compound was prepared using the conventional ceramic
double sintering process with various compositions.
The results show a drop at the Curie temperature. The relation of
log(σT) against 103/T illustrates a transition near Curie temperature. The
activation energy in the ferrimagnetic region is found in general to be less than
that in paramagnetic region. An attempt is also made to explain the conduction
mechanism in these ferrites.