Synthesized via the citrate gel auto-combustion method and heated at 950°C for 4 hours, M-type hexaferrites with varying cobalt content (x = 0.00, 0.10, 0.20, 0.30, 0.40) exhibit notable characteristics for lossless applications. XRD analysis indicates the presence of the M-phase, PbM, and hematite. Microstructural examination unveils hexagonally shaped platelets organized in stacking clusters. TEM imagery and SAED patterns for x = 0.3 composition illustrate a polycrystalline nature, with particles observed to fuse with neighboring ones. Magnetic analysis shows hard magnetic behavior with multi-domain structures, and the x = 0.10 composition achieves a maximum saturation magnetization of 55.427 A m²/kg. Coercivity varies from 0.058 T to 0.390 T. Cobalt substitution strongly influences dielectric properties, with an increase in ac conductivity and dielectric constant observed from x = 0.00 to x = 0.10, followed by a reduction from x = 0.10 to x = 0.40. The consistently low loss tangent across compositions suggests potential for lossless applications.
Link of DOI : Article Structural, morphological, magnetic hysteresis and dielectri...
#Hexaferrites
#MaterialsScience
#MagneticProperties
#DielectricProperties
