Abstract
Thermoelectric power studies of cobalt substituted calcium ferrites of various compositions were investigated from room temperature to well beyond the Curie temperature by the differential method. The Seebeck coefficient is negative for all the compositions showing that these ferrites behave as n-type semiconductors. Plots of the Seebeck coefficient versus temperature show a maximum at Curie temperature. On the basis of these results an explanation for the conduction mechanism in Ca–Co mixed ferrites is suggested.
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