A series of cobalt doped nickel ferrite with composition of Ni1-XCoXFe2O4 with x ranges
from 0.0 to 0.8 (in steps of 0.2) was prepared by using co-precipitation method and subsequently
sintered, annealed at 6000
C for 3h. The influence of the Co content on the crystal lattice parameter,
the stretching vibration and the magnetization of specimens were subsequently studied. XRD and
FTIR were used to investigate structure and composition variations of the samples. All samples
were found to have a cubic spinel structure. TEM was used to study morphological variations. The
results indicate that the average particle sizes are between 29¸35 nm. B-H hysteresis measurement
was carried out at room temperature under field of 5 kOe and this measurement with the increase
of Co2+
concentration yields the monotonic increase of saturation magnetization (MS) and coercive
field (HC). Ferrites with such behavior are important for magnetic recording media, microwave
applications, environment and medical biology [1-3]. In view of this, we have studied the various
properties of Co doped Ni ferrite.
