An investigation of structural, magnetic and microwave properties of strontium hexaferrite nanoparticles prepared by a sol–gel process with doping SN and Tb

•With an increase in Sn–Tb content the mean particle size decreases.•With an increase in Sn–Tb content magnetization increases and coercivity decreases.•With an increase in Sn–Tb content resonance frequency decreases.

The goal of this study was to investigate the structural, magnetic and microwave properties of Sn4+–Tb4+ substituted strontium ferrite with chemical formula of SrFe12−x(SnTb)x/2O19(x=0–2)(in the step of 0.5) nanoparticles prepared by the sol–gel method. In order to study the formation of hexaferrite phase, X-ray diffraction analysis was carried out and it was discovered that a single magnetoplumbite was formed. A field emission scanning microscopy was hired to explore the morphology and particle size of nanopowders. Fourier-transform infrared was employed to confirm different bond modes which were structured. A vibrating-sample magnetometer was used to investigate the magnetic characteristics of the prepared samples. The results showed that with an increase in substitutions, Sn–Tb, magnetization and remanence were increased along with a decrease in coercivity. A vector network analyzer was utilized to scrutinize the microwave properties. The resultant data showed a striking achievement with high reflection loss value and a wide bandwidth in the range of 20–26 GHz.