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

Sabah M Ali Ridha,Marwan H Ali Albayati

doi:10.32894/kujss.2016.124402

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.

Highlights

The complex oxide, which contains trivalent iron ion as the main ingredient is generally called Ferrite [1]
The resistivity of ferrites at room temperature can vary from )10-2 to 1011. They are considered superior to other magnetic materials because they have low eddy current losses and high electrical resistivity
Due to rapid progress in the fabrication and processing of nanostructures, ferrite magnetic materials can be made in the range of nanometer (1-100) nm

Summary

Introduction

The complex oxide, which contains trivalent iron ion as the main ingredient is generally called Ferrite [1]. The resistivity of ferrites at room temperature can vary from ) to 1011 They are considered superior to other magnetic materials because they have low eddy current losses and high electrical resistivity. Ferrites have good magnetic properties at the same time are the insulating materials so it is preferred in industries which operate within the high frequency up to (10) MHz , they do not readily conduct electricity. This gives them an advantage over iron, nickel and other transition metals that have magnetic properties in many applications because these metals conduct electricity [5,6]. Several research groups are involved in the investigations of spinel oxide nano particles because of their potential applications in magnetic devices, microwave technology and high-density magnetic recording media, etc [8]

Material and Method

Electrical properties

Results and discussion

Conclusions