<p>The rare earth element-doped barium hexaferrite nanoparticles have drawn great interest towards researchers due to their improved thermal, magnetic, and structural characteristics. These properties make them appropriate for cutting-edge technological applications like shielding against electromagnetic interference, high-density data storage, and microwave absorption. Because of their distinct electronic configurations, rare earth metals like neodymium, strontium, Europium, and lanthanum change thermal stability, coercivity, and magnetic anisotropy when added to the barium hexaferrite lattice. This&#xa0;review examines the different synthesis methods for doping barium hexaferrite with rare earth ions, including sol–gel combustion, ball milling, and co-precipitation procedures, emphasizing the impact on the material’s structural, morphological, and magnetic properties. The different rare earth-doped barium hexaferrite particles resulting in various applications are also covered in this review.</p> Graphical Abstract <p></p>