The polycrystalline compounds with chemical formula CaxSryBa1-x-yFe12-zLazO19 (CSBFLO) were synthesized via standard ceramic method. The chemical phase analysis was carried out by X-ray powder diffraction (XRD) method, which confirms the formation of the magnetoplumbite phase, belongs to ferrite structure. The thermoelectric power studies of hexagonal ferrites of various compositions were investigated. The See-beck coefficient is negative for all the compositions showing that ferrites behave as n-type semiconductors. The value of the charge carrier's concentration has been computed from the observed values of the see-back coefficient. On the basis of these results an explanation to conduction mechanism for the properties like electrical conductivity & Dielectric constant is suggested.

Keywords: standard ceramic method, Thermoelectric power, Dielectric polarization, electrical conductivity.