Tailoring GO/BaFe12O19/La0.5Sr0.5MnO3 ternary nanocomposite and investigation of its microwave characteristics

In this study, the BaFe12O19/La0.5Sr0.5MnO3 nanocomposite was architected by the complementary citrate gel and ultrasonic methods, following that it was designed by graphene oxide (GO) with various mass fractions using a freeze dryer. The scanning electron microscopy (SEM) micrographs illustrated that the modified hexaferrites were fully covered by the La0.5Sr0.5MnO3 nanoparticles as well as confirmed that GO nanosheets were uniformly anchored by the obtained nanocomposites. The patterns of x-ray powder diffraction (XRD) revealed that the BaFe12O19/La0.5Sr0.5MnO3 nanocomposite was formed by the tailored complementary methods. Moreover, magnetic properties were assessed by the vibrating sample magnetometer (VSM). Finally, microwave characteristics were deeply explored by the obtained results from a vector network analyzer (VNA). Accordingly, the efficient bandwidth of GO(5.0%)/BaFe12O19/La0.5Sr0.5MnO3 nanostructure was 1.97 GHz (RL < −20 dB) while the maximum reflection loss of the GO(2.5%)/BaFe12O19/La0.5Sr0.5MnO3 nanocomposite was 67.10 dB at 11.6 GHz with a thickness of 2.25 mm. Interestingly, all of the samples suspended in the silicone rubber medium entirely absorbed the x-band more than 10 dB with 2.5 mm in thickness.