Abstract
This article describes the experimental investigation on the magnetization behavior of Ni1-xCdxFe2O4 ferrites for x greater than or equal to 0.0 & less than or equal to 0.8 prepared by conventional ceramic method. Magnetic properties have been measured as a function of field and temperature using vibrating sample magnetometer and SQUID magnetometer. Saturation magnetization at 20 K increases with Cd-content up to x = 0.5 and decreases thereafter. Neel’s two sublattice collinear model is applied for the initial rise of the magnetization up to x less than or equal to 0.5 and beyond that three sublattices non-collinear model proposed by Yafet-Kittel are predominant. This indicates the appearance of spin canting structure in Ni1-xCdxFe2O4 ferrites with higher Cd-content. Sample with x = 0.8 shows anomalous temperature dependent magnetic ordering on applied magnetic field. Low field (5 Oe) magnetization shows antiferromagnetic ordering while the ferromagnetic ordering has been found to be dominant with the high field (1 T). That is the magnetic ordering of Ni1-xCdxFe2O4 is dependent on the strength of applied field.