Kirkuk University Journal-Scientific Studies

Abstract

In the present work, the Ni-La ferrite chain (NiLaxFe2-xO4) with (x=0.0-‎‎ 0.2),were synthesized using sol-gel auto-combustion as a modern chemical ‎methods. Nitrates, citric acid and ammonia were used ‎in order to get ferrite nano powders at temperature of (200)oC, which characterized a higher dispersion ‎and homogeneity with particle size in the range of (20-39) nm. The dielectric properties are measured using (LCR) meter in the frequency ‎range of (50Hz –5MHz). Dielectric constant (εr'), the loss tangent ‎‎( tanδ ) and the loss factor (εr′′) are decreases with increasing frequency, while the Conductivity (σa.c) increases ‎with increasing the rare earth ion (La) concentration in Ni ‎ferrite.