CHARGE TRANSPORT AND CONDUCTION MECHANISM OF SOME SUBSTITUTED STRONTIUM W-TYPE HEXAGONAL FERRITES

Abstract

The present work is intended to investigate the thermopower and electrical conductivity studies of some substituted strontium W-type hexagonal ferrites as a function of composition and temperature. On the basis of the sign of the Seebeck coefficient (S), the ferrites under investigation have been classified as n-type semiconductors. Using the experimental values of Seebeck coefficient at various temperatures, the values of charge carrier concentration have been determined. On the basis of the temperature variation of charge carrier mobility, the conduction mechanism in these ferrites has been discussed.