Improvement of electric and magnetic properties for li spinel ferrite by divalent Ni2+ ions substitution

Other Title(s)

تأثير أيونات النيكل الثنائية على الخواص الكهربية و المغناطيسية لليثيوم أسبنل فيريت

Dissertant

al-Hulw, Ilham Abd al-Fattah Ibrahim

Thesis advisor

Dawud, Husayn Abd al-Karim

University

Islamic University

Faculty

Faculty of Science

Department

Department of Physics

University Country

Palestine (Gaza Strip)

Degree

Master

Degree Date

2017

English Abstract

In the present work magnetic, electric and dielectric properties are investigated for mixed ferrite Li0.5(1-x)NixFe2.5-0.5xO4 ( where x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) which are prepared from high purity oxides using standard ceramic technique.

The net magnetization (M) was measured at room temperature in the range of the applied field [200-2650 (A/m)].

The results indicated that the M decreased with increasing of the ions.

The highest value of M was registered for the sample of x=0.0, where the lowest value was registered for the samples of x=1.0.

The inductance was measured as a function of temperature to determine the Curie temperature (It is the temperature which the material transform from ferrimagnetic to paramagnetic .

It was found that, the Curie temperature decreased with increasing of the Ni2+ ions.

Complex dielectric constant ( ), dielectric loss tangent ( ) and AC conductivity ( ) were investigated in the frequency range of at room temperature.

It was found that, the and were decreased continuously, while was increased with increasing of the applied frequency.

Main Subjects

Physics

No. of Pages

56

Table of Contents

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Language

English

Data Type

Arab Theses

Record ID

BIM-902555