Thermoelectric power studies of zinc substituted copper ferrites

Thermoelectric power studies of zinc substituted copper ferrites of Various compositions were investigated from room temperature to well beyond the Cu rie temperature by the differential method. The Seebeck coefficient is nega tive for all the compositions showing that these ferrites behave as n-type semiconductors. The values of the charge carrier concentration have been co mputed from the observed values of the Seebeck coefficient. The temperature variation of the Seebeck coefficient and carrier concentration is also dis cussed. On the basis of these results an explanation for the conduction mec hanism in Cu-Zn mixed ferrites is suggested. (C) 1999 Elsevier Science S.A. All rights reserved.