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.