Abstract: Our research focuses on the synthesis and characterization of M-type hexaferrites with cobalt substitution, specifically Ba0.4Pb0.6Fe12-xCoxO19 (x = 0.00, 0.10, 0.20, 0.30, 0.40). Utilizing the citrate gel auto-combustion method and subsequent heat treatment at 950 °C for 4 hours, we observed the development of the M-phase, along with PbM and hematite, as confirmed by XRD analysis. Microstructural analysis revealed the formation of stacking clusters of hexagonally shaped platelets. TEM imaging of the x = 0.3 composition demonstrated a polycrystalline nature, with particles observed to fuse with neighboring particles. Magnetic hysteresis (M − H) loops of all samples exhibited hard magnetic behavior with a multi-domain structure. Notably, the x = 0.10 composition displayed the maximum saturation magnetization of 55.427 A m2/kg, and coercivity varied between 0.058 T and 0.390 T across different compositions. Cobalt substitution significantly influenced the dielectric properties, with the ac conductivity and dielectric constant showing a rising trend from x = 0.00 to x = 0.10, followed by a reduction from x = 0.10 to x = 0.40. The consistently low value of the loss tangent across all compositions indicates promising potential for lossless applications #Hexaferrites #MagneticProperties #DielectricProperties

DOI : Article Structural, morphological, magnetic hysteresis and dielectri...