Magnetic and Structural Studies of Ba0.5Sr0.5(ZnTi)xFe12-2xO19 Prepared by Ball Milling

Results on structural and magnetic studies of Ba0.5Sr0.5(ZnTi)xFe12-2xO19 (where x = 0.2 to 0.6) ferromagnetic powders prepared by mechanical milling are presented. The obtained X-ray diffraction patterns of Zn-Ti substituted (BaSr)0.5M samples showed Magnetoplumbite phase formation for all substituted mixtures; no other secondary phases were detected. Scanning electron microscope analyses reveled that all processed samples possess particle size much below 1 µm and may exhibit promising magnetic and dielectric properties. Magnetic measurements showed that the intrinsic coercivity, Hci, and remanent magnetization, Mr, decreased as the substitution took place, while the saturation magnetization, Ms, remained almost constant (diminution ~ 9%). Hci, decreased from 389.92 down to 171.88 k A/m that represents a 56% drop, whilst Mr registered a fall of ~ 17%.