Abstract
W-type hexaferrite particles with composition of SrCo2−x (NiZnMg) x/3Fe16 O 27 (x = 0–0.5) were synthesized by a chemical co-precipitation method. The effect of substitution on the structural and magnetic properties of particles was characterized by X-ray diffraction (XRD), Fourier-transformed infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), vibrating sample magnetometer (VSM), and B-H tracer. The synthesized particles were applied under a high magnetic field of 1 T by employing a super high-capacity magnetizer and normal compression stress. The XRD patterns confirmed the existence of hexagonal W-type single phase. The FE-SEM micrographs demonstrate the nucleation of hexagonal particles along with the close view of aspect ratio of hexagonal platelet. The elemental composition estimated from the EDX analysis was in good agreement with the nominal composition. Hysteresis loops for all samples were measured at a room temperature up to a maximum applied field of 24 kOe. The results revealed that with an increase in substitutional cation contents, the values of saturation magnetization decreased from 60.6 to 11.6 emu/g, and the values of coercivity increased from 2255 to 5107 Oe. The B-H curves of field annealed bulk ferrites also display the similar trend.
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