Structural and magnetic conduct in Sm and Al substituted Ba_0.9Sm_0.1Fe₁₀Al₂O₁₉M-type hexaferrites at different sintering temperatures

Abstract

The hexagonal ferrites with composition Ba0.9Sm0.1Fe10Al2O19 have been prepared by using the conventional solid state reaction method. The prepared samples were then sintered at different sintering temperatures to analyze the effects on the magnetic and structural properties of Barium hexaferrites. These samples were then characterized by using various techniques. For structural characterization, the X-ray diffraction technique was used. XRD results confirmed the phase pure hexagonal structure. SEM micrographs suggested the formation of hexaferrites material with homogenous distribution of particles. Magnetic properties showed that the saturation magnetization value was observed 48.55 emu/g and coercivity 5.01 KOe for the sample sintered at 1220 °C. As the sintering temperature rises, the values for magnetic saturation decrease to 46.24 emu/g, and coercivity increases up to 5.26 KOe at 1270 °C. Furthermore, some magnetic anisotropic parameters such as magnetocrystalline anisotropy constant (K), anisotropy parameter (B), and the anisotropy field (Ha) were also calculated at different sintering temperatures.