Abstract
M-type Al-Cr-substituted strontium hexaferrite (SrFe12-x-yAlxCryO19 where x = y = 0.0, 0.05, 0.1, 0.15, and 0.2) powders are synthesized successfully using sol-gel auto-combustion method. The synthesized powders were sintered at 1200 degrees C for 2 h, and their structural, morphological, and magnetic properties were studied using characterization techniques like XRD (X-ray diffraction), FTIR (Fourier transform infrared spectroscopy), SEM (scanning electron microscopy), and VSM (vibrating sample magnetometer). The XRD pattern confirmed the formation of single phase hexagonal structure with P6(3)/mmc space group. The saturation magnetization is observed to decrease from 63.37 to 46.89 emu/g with the increase in dopant concentration. However, the coercivity initially decreased and then increased with increase in dopant concentration.