A comparative study on the magnetic and electrical properties of MFe12O19 (M=Ba and Sr)/BiFeO3 nanocomposites

• M-type nanohexaferrite (MFe12O19) as M=Ba and Sr powders were synthesized by the citrate autocombustion method.
• The lattice parameters of composite were negligibly smaller than those of M-type.
• FESEM showed that the samples were hexagonal plate-like shape.
• Ms, Mr, μeff. and HC were improved to be suitable for perpendicular high density recording media.
• ε′ increased with BFO ratio which is useful in microwave devices.

M-type hexaferrite (MFe12O19), M=Ba or Sr nanoparticles with hexagonal crystal structure have been successfully synthesized by a citrate auto-combustion method. BiFeO3 (BFO) was prepared by the flash auto-combustion technique. Different nanocomposites were prepared according to the formula [(1−X) MFe12O19+XBiFeO3; M=Ba or Sr, X=0.3, 0.4, 0.5 and 0.6]. The structure and morphology of the obtained nanocomposites have been determined by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). From the results, it is observed that the value of saturation magnetization decreases with increasing BFO content, which was mainly due to the contribution of the volume of the weak-magnetic BFO to the total sample volume.