Abstract:
In present work, the cobalt (Co) doped Barium hexaferrite (Ba(1-x) Fe12 (Co)xO19) with
different cobalt concentrations of x = 0, 0.2, 0.35 and 0.5 were prepared by using a
chemical co-precipitation method. A calcination temperature of 950 °C was used for
all the synthesized samples. The X-ray diffraction analysis of the prepared samples
clearly showed the formation of Barium hexaferrite. The dielectric properties
(including dielectric constant, dielectric loss, tangential loss, and AC conductivity) of
the samples were studied via an impedance analyzer. With increasing Co
concentration, a significant increase in the dielectric constant, dielectric loss and
tangential loss was observed. Saturation magnetization and coercivity of the prepared
samples were measured using vibrating sample magnetometer (VSM). The VSM
analysis showed a decreasing trend in the saturation magnetization and coercivity
values with increasing the Co concentration. The magnetic coercivity was found to be
3567 Oe and 918 Oe for Co concentration of x = 0 and 0.5, respectively, which also
showed changing of hard magnetic ferrite to soft magnetic ferrite.
