Microstructured and Magnetic Properties of Sr2Co1.7Mg0.3Fe11.2Sn0.4Zn0.4O22 Hexaferrite Synthesized by Auto-Combustion Sol-Gel Metho

A single phase Y-type hexagonal ferrite Sr2Co1.7Mg0.3Fe11.2Sn0.4Zn0.4O22 was synthesized by sol–gel auto combustion method. The microstructured and magnetic properties of this Y-type hexagonal ferrite composition have been investigated. Different experimental techniques such as differential thermal and thermo-gravimetric analyses, X-ray diffraction, Fourier transform infrared spectroscopy, high resolution field emission scanning electron microscopy and vibrating sample magnetometry were used to investigate the sample. The X-ray diffraction (XRD) patterns confirm single phase Y-type hexagonal ferrite powders were obtained after calcinations at 1000 °C and showed that the crystallite size is 44 nm. The microstructures of the pure powders appeared as a hexagonal platelet-like structure and particles size was 90-210 nm .The saturation magnetization (Ms) and the coercivity (Hc) of the samples were in the range, 28.34–48.47 emu/g and 637-1108 Oe, respectively. The heat treatment temperature increased the magnetization, following a decrease in coercivity due to intermediate phases replacement by single Y-type hexaferrite, Which can be used as soft magnetic materials in multilayer inductors for high frequency applications.