In this study, we have presented a comparison of the structural, magnetic, dielectric, microwave and electromagnetic properties of four series of Co-Zr doped SrCo x Zr x Fe (12−2x) O 19 (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) synthesized by simple solgel method using ethylene glycol [series 1 (Chawla et al. in