A study on the dielectric properties of La+3 doped nickel ferrite

Abstract

In the present work, the Ni-La ferrite chain (NiLa x Fe 2-x O 4) 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) o C, 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 (ε r '), the loss tangent (tanδ) and the loss factor (ε r ′′) are decreases with increasing frequency, while the Conductivity (ζ a.c) increases with increasing the rare earth ion (La) concentration in Ni ferrite.