The SrFe₁₁MnO₁₉/CoFe_1.9Bi_0.1O₄/PANI nanocomposites were prepared with different mass ratios of SrFe₁₁MnO₁₉/CoFe_1.9Bi_0.1O₄ to PANI by the auto-combustion sol–gel and in-situ polymerization methods. The nanocomposites were analyzed with several techniques such as FTIR, XRD, VSM, and VNA. The Fourier-transform infrared spectroscopy (FT-IR) analysis shows that all pure PANI absorption bonds (exception of the 477 cm⁻¹) have existed in SrFe₁₁MnO₁₉/CoFe_1.9Bi_0.1O₄. X-ray diffraction (XRD) depicts the simultaneous existence of the ferrite composite and PANI phases. Also, VSM analysis reveals that the saturation magnetization (M_s) and the remanence magnetization (M_r) decrease while the magnetic coercivity field (H_C) remains almost constant in SrFe₁₁MnO₁₉/CoFe_1.9Bi_0.1O₄/PANI samples. Besides, the Faraday balance technique represents that Curie temperature (T_C) of ferrite nanocomposite decreasing with increasing PANI ratio, as well as vector network analysis (VNA) in X and K_u bands, showed that the minimum reflection loss (R_L) is − 24.3 dB that belonged to SrFe₁₁MnO₁₉/CoFe_1.9Bi_0.1O₄/PANI with ferrite composite to PANI mass ratio of (C: P = 80:20) %.

的SRFE ₁₁的MnO ₁₉ /由CoFe _1.9的Bi _0.1 ø ₄ / PANI纳米复合材料用SRFE的不同质量比制备₁₁的MnO ₁₉ /由CoFe _1.9的Bi _0.1 Ò ₄到PANI由自动燃烧溶胶-凝胶和原位聚合的方法。使用诸如FTIR，XRD，VSM和VNA的多种技术分析了纳米复合材料。傅立叶变换红外光谱（FT-IR）分析表明，SrFe ₁₁ MnO ₁₉ / CoFe _1.9 Bi _0.1中存在所有纯PANI吸收键（477 cm ^-1除外）。O ₄。X射线衍射（XRD）描绘了铁素体复合物相和PANI相的同时存在。此外，VSM分析表明，在SrFe ₁₁ MnO ₁₉ / CoFe _1.9 Bi _0.1 O ₄ / PANI样品中，饱和磁化强度（M _s）和剩磁强度（M _r）降低，而矫顽力场（H _C）几乎保持恒定。此外，法拉第平衡技术表明，铁素体纳米复合材料的居里温度（T _C）随PANI比的增加而降低，以及X和K _u中的矢量网络分析（VNA）。谱带显示最小反射损耗（R _L）为− 24.3 dB，属于SrFe ₁₁ MnO ₁₉ / CoFe _1.9 Bi _0.1 O ₄ / PANI，铁氧体与PANI的质量比为（C：P  = 80:20）％ 。