Comparative studies of SrZrxMnxFe12−2xO19 nanoparticles synthesized by co-precipitation and sol–gel combustion methods

Strontium hexaferrite SrZrxMnxFe12−2xO19 (x = 0.0–0.8) nanoparticles were synthesized by chemical co-precipitation and sol–gel combustion methods. The co-precipitation is found to be more suitable because samples synthesized by this method have a single phase for x = 0.0–0.8 and DC resistivity is also improved by this method, whereas samples synthesized by the sol–gel combustion method have single phase only when x = 0.0–0.4. The dielectric constant and dielectric loss factor are in excellent agreement with DC electrical resistivity data.