Structural and magnetic conduct in Sm and Al substituted Ba0.9Sm0.1Fe10Al2O19 M-type hexaferrites at different sintering temperatures

The hexagonal ferrites with composition Ba0.9Sm0.1Fe10Al2O19 has been prepared by using conventional solid state reaction method. As prepared samples were then sintered at different sintering temperatures to analyze the effects on magnetic and structural properties of Barium hexa ferrites. These samples were then characterized by using various techniques. For structural characterization x-ray diffraction technique was used. XRD results confirmed phase pure hexagonal structure. No impurity peaks were observed. For Morphological analysis of all the samples Scanning Electron Microscopy (SEM) was utilized. SEM micrographs suggested the formation of hexaferrites material with homogenous distribution of particles. Magnetic properties were measured by permanent magnetic measuring system. Magnetic conduction of material was tested under varying magnetic field of +/- 30 KOe at room temperature. The saturation magnetization value was observed 48.55 emu g(-1) and coercivity 5.01KOe for the sample sintered at 1220 degrees C. As the sintering temperature rises, the values for magnetic saturation decreases to 46.24 emu g(-1) and coercivity increases up to 5.26 KOe at 1270 degrees C.

Automated summary

The hexagonal ferrites, Ba0.9Sm0.1Fe10Al2O19, were synthesized using the conventional solid state reaction method. The effects of different sintering temperatures on the magnetic and structural properties of Barium hexa ferrites were analyzed. XRD confirmed a pure hexagonal structure with no impurity peaks. SEM analysis showed a homogeneous distribution of particles. Magnetic measurements revealed a saturation magnetization value of 48.55 emu g(-1) and coercivity of 5.01 KOe for the sample sintered at 1220 degrees C. With increasing sintering temperature, the saturation magnetization decreased to 46.24 emu g(-1) and the coercivity increased to 5.26 KOe at 1270 degrees C.