Magnetic and microwave absorption of BaMgxZrxFe12-2xO19 polyaniline nanocomposites

Highlights: • BaMg_xZr_xFe_12-2xO₁₉ (x = 0.25, 0.5, 0.75, 1, 1.5)/PANI synthesized by in situ method. • BaMg_xZr_xFe_12-2xO₁₉/PANI showed Microwave absorption properties. • Dopant concentration has impact on the magnetic and Microwave absorption properties. • Reflection loss shows that nanocomposite have good potential in microwave application. • BaMg_xZr_xFe_12-2xO₁₉/PANI nanocomposite characterized by XRD, FT-IR, VSM, and SEM. -- Abstract: magneticMg/Zr doped Barium Ferrite nanoparticlesBaMg_xZr_xFe_12-2xO₁₉ (x = 0.25, 0.5, 0.75, 1, and 1.5) were synthesized successfully through sol-gel method and conducting BaFe_12-2xMg_xZr_xO₁₉/PANI (x = 0.25, 0.5, 0.75, 1, and 1.5) nanocompositeswere prepared by polymerization of aniline in the presence ofBaMg_xZr_xFe_12-2xO₁₉ (x = 0.25, 0.5, 0.75, 1, and 1.5).The morphology, magnetic properties, crystal structure, and hexagonal phase of nanocomposites were measured using field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDXA), vibrating sample magnetometer (VSM), and X-ray diffraction (XRD) techniques. Microwave absorption properties of the nanocomposites with different thicknesses of 2, 3, 4 mm were measured through vector network analyzer (VNA). The main purpose was to investigate the effect of two different dopant concentrations (Zirconium and Magnesium) on the magnetic, microwave absorption, and morphology of nanocomposites. The VSM resultsdemonstrated that themagnetic properties of nanocomposites decrease by increasing the dopant concentration. Moreover, microwave absorption results demonstrated that the minimum S11 value for BaMg_0·25Zr_0·25Fe_11·5O₁₉/PANI in 15.9 GHz and 9.6 GHz at the Ku and X bands reached to −49 dB and −37dB, respectively. In addition, the minimum S11 value is −39 dB for BaMg_0.5Zr_o.5Fe₁₁O₁₉. The microwave absorption results showed that the BaMg_0·25Zr_0·25Fe_11·5O₁₉/PANI nanocomposites have good potential for microwave applications as an absorber in the microwave region.