Innovative methodology for the synthesis of Ba-M hexaferrite BaFe₁₂O₁₉ nanoparticles

Graphical abstract: Transmission electron microscope images for the BaFe12O19. - Highlights: • BaFe₁₂O₁₉nanoparticles were prepared in single-phase from organometallic precursors. • BaFe₁₂O₁₉ possesses small size 65 nm, H_C = 3695 Oe and M_s = 58 emu/g. • This method of preparation could be extended in the synthesis of other metal oxide nanoparticles. - Abstract: In this piece of work, high quality and homogeneity, barium hexaferrite (BaM) BaFe₁₂O₁₉ nanoparticles were prepared from organometallic precursors for the 1st time. This method is based on the formation of supramolecular crystal structure of Ba[Fe(H₃NCH₂CH₂NH₃)]Cl₇·8H₂O. The crystal structure, morphology and magnetic properties of BaFe₁₂O₁₉ at two different annealing temperatures namely 1000 °C and 1200 °C were investigated using X-ray diffraction, transmission electron microscope TEM and vibrating sample magnetometry (VSM). The results show that monophasic nanoparticles of hexaferrites were obtained. Nanoparticles of crystallite size 40–50 nm distinguished by narrow distribution and excellent homogeneity were obtained with superior magnetic properties which suggested single-domain particles of Ba-M hexaferrite