Characterization of sol-gel auto-combustion derived Nano-structured magnesium substituted cobalt spinel ferrite

Other Title(s)

خواص مغنيسيوم كوبلت أسبنل فرايت نانوية التركيب المحضرة بطريقة السول-جل ذات الاحتراق الداخلي

Dissertant

Khillah, Muhammad Yusuf Abd al-Khaliq

Thesis advisor

Dawud, Husayn Abd al-Karim
Shaat, Sami Khalil

University

Islamic University

Faculty

Faculty of Science

Department

Department of Physics

University Country

Palestine (Gaza Strip)

Degree

Master

Degree Date

2019

English Abstract

Nano-structured mixed spinel ferrite MgxCo1-xFe2O4, where x = 0.0, 0.2, 0.4, 0.6 and 0.8 is the stoichiometric proportion of Mg2+ ions, were prepared by the sol-gel autocombustion.

The aims of this study were to investigate the influence of replacement of the Co2+ ions by Mg2+ in the nano-structured Co-spinel ferrite.

The structural of the prepared spinel ferrite was confirmed by Fourier Transform Infrared Spectroscopy.

In addition, they revealed that the main absorption peak of the octahedral sites made a blue shift with increasing of the Mg2+ ions concentration.

The ionic radii of tetrahedral (Td) and octahedral (Oh) sites were calculated for all samples according to the suggested cations distribution.

It was found that The magnetic moment of the tetrahedral sites (µT), octahedral sites (µo), and the net magnetic moment (µnet ) decreased with increasing of the 2 Mg ions.

The measured net magnetization (M) decreased with increasing of the Mg2+ ions.

In addition, it was found that, the relative permeability ( r ) decreased exponentially with increasing of the applied magnetic field H for samples of x = 0.0 and 0.2, while it increased exponentially with increasing of the applied magnetic field H for samples of x = 0.4, 0.6 and 0.8.

To determine the Curie temperature point (Tc), the inductance was measured as a function of temperature.

It was found that, the Tc decreased with increasing of the Mg2+ ions.

AC conductivity (σAC), complex dielectric constant (ε ∗ ) and dielectric loss tangent ( tan( ) ) were investigated in the frequency range of (50 KHz to 80 MHz) at room temperature.

It was found that, σAC increased with increasing of applied frequency up to f = 10 MHz and after that some resonance peaks were observed.

Moreover the ε ∗ in samples of x = 0.2, 0.4, 0.6 and 0.8 decreased, continuously, in the low frequency region and an almost frequency independent behavior in the high frequency region, while it decreased with increasing of the applied frequency for x = 0.0.

Furthermore, tan( ) for samples of x = 0.2, 0.4, 0.6 and 0.8 decreased continuously with increasing of applied frequency, while for x = 0.0, tan( ) , decreased continuously in the low frequency region and an almost frequency independent behavior in high frequency region.

Main Topic

Physics

Topics

No. of Pages

85

Table of Contents

Table of contents.

Abstract.

Abstract in Arabic.

Chapter One : Introduction.

Chapter Two : Theoretical review of the nano ferrimagnetic material.

Chapter Three : Literature survey.

Chapter Four : Experimental techniques and apparatus.

Chapter Five : Results and discussion.

Conclusions.

References.

American Psychological Association (APA)

Khillah, Muhammad Yusuf Abd al-Khaliq. (2019). Characterization of sol-gel auto-combustion derived Nano-structured magnesium substituted cobalt spinel ferrite. (Master's theses Theses and Dissertations Master). Islamic University, Palestine (Gaza Strip)
https://search.emarefa.net/detail/BIM-902567

Modern Language Association (MLA)

Khillah, Muhammad Yusuf Abd al-Khaliq. Characterization of sol-gel auto-combustion derived Nano-structured magnesium substituted cobalt spinel ferrite. (Master's theses Theses and Dissertations Master). Islamic University. (2019).
https://search.emarefa.net/detail/BIM-902567

American Medical Association (AMA)

Khillah, Muhammad Yusuf Abd al-Khaliq. (2019). Characterization of sol-gel auto-combustion derived Nano-structured magnesium substituted cobalt spinel ferrite. (Master's theses Theses and Dissertations Master). Islamic University, Palestine (Gaza Strip)
https://search.emarefa.net/detail/BIM-902567

Language

English

Data Type

Arab Theses

Record ID

BIM-902567