Effect of temperature on structural and magnetic properties of Co and Mg doped M-type hexaferrites

Abstract

Abstract Using the sol-gel auto combustion method, M-type barium hexaferrite of composition Ba0.6Co0.4Mg0.4Fe11.6O19 was prepared. The precursor was divided into three parts and heated at three different temperatures i.e., 9000C, 10000C, 11000C. The structural samples were investigated using an XRD analysis. The variation of crystallite size and lattice constant to temperature was studied from the XRD data. The functional groups attached to the samples were investigated using Fourier transform infrared spectroscopy. To understand the topography and elemental composition, the sample was analysed using a field emission-scanning electron microscope (FESEM). A VSM instrument was employed to investigate the magnetic property of the three samples. Magnetic parameters such as coercivity, saturation magnetization, magnetic retentivity, anisotropy constant, etc were calculated and tabulated.