In the present study, nano-crystalline Ni1xZnxFe2O4 ferrites (x = 0.0–1.0) were prepared via novel chitosan
method. The prepared ferrites were characterized using X-ray diffraction (XRD), transmission electron
microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and vibrating sample magnetometer
(VSM) techniques. XRD revealed the formation of spinel single-phase structure for the samples with
Zn-content more than 0.4. The crystallite sizes estimated using Scherer formula are in the range 34–45 nm.
TEM images reflect the agglomeration characteristics of the prepared ferrites. FT-IR spectra show two
prominent characteristic peaks of ferrites. VSM measurement suggests the validity of the entire method
for preparation of ferrites with high magnetization. The saturation magnetization was found to increase
up to x = 0.4 then gradually decrease while coercivity decreased with increasing Zn-content. These
changes in the magnetic properties by the addition of Zn were discussed depending on the estimated cation
distribution of the system and the magneto-crystalline anisotropy of the entire ions, respectively |
