PROPERTIES OF M-TYPE BARIUM FERRITE DOPED BY SELECTED IONS

The magnetic and structural properties of substituted Ba hexaferrite M-type samples with composition BaFe12 2x(Me1 − Me2)xO19,where Me1 = Zn, Co, Ni, and Me2 = Zr, Ti, were compared. The powder samples with 0.0 ≤ x ≤ 0.6 were prepared by two processing routes. Different Fe/Ba ratio was used for mechanical alloying (Fe/Ba = 10.0) and for the citrate precursor method (Fe/Ba = 10.8). Magnetic properties were studied by both vibrating sample magnetometry and thermomagnetic analysis. The ferrite formation process was followed by Mssbauer spectroscopy. K e y w o r d s: substituted hexagonal ferrite, organometallic precursor, mechanical alloying, magnetic properties