In this study, SrFe12O19 (M-type hexaferrite) and NiFe2O4 (spinel) nanoferrite powders were successfully synthesized using Calotropis gigantea flower extract. Subsequently, nanocomposites of SrFe12O19/NiFe2O4 were prepared with varying weight ratios (M:S: 9:1, 8:2, 7:3, 6:4, 5:5). The investigation revealed that the average crystallite size of the nanocomposites ranged from 25 nm to 44 nm, with a decrease in the M-phase crystallite size as the spinel phase increased. X-ray diffraction analysis confirmed the presence of both M and S phases in the nanocomposites. Magnetic properties analysis, including M-H loops, indicated a decrease in coercivity and saturation magnetization with increasing spinel phase amount. Different weight ratios exhibited either hard ferrite or soft magnetic behavior, with the 5:5 ratio showing a soft magnetic nature. The nanocomposites displayed a multi-domain structure, and the study identified varying degrees of exchange coupling interactions, ranging from weak to partial and perfect coupling in different weight ratios. Overall, the research provides a comprehensive understanding of the structural, magnetic, and microstructural characteristics of the synthesized nanoferrite powders and their nanocomposites.

Article Tailoring magnetic and dielectric properties of SrFe12O19/Ni...

#Dielectric properties

#Microstructural properties

#Multi-domain structure

#Exchange coupling interactions

#M-H loops analysis

#X-ray diffraction analysis