Improvement of electric and magnetic properties for li spinel ferrite by divalent Zn2+ ions substitution
Other Title(s)
تأثير أيونات الزنك الثنائية على الخواص الكهربية و المغناطيسية لليثيوم اسبنل فريت
Dissertant
Abu Musa, Zanah Awdah Muhammad
Thesis advisor
Comitee Members
Tayih, Sufyan Abd al-Rahman
Hamadah, Majdi Salim
University
Islamic University
Faculty
Faculty of Science
Department
Department of Physics
University Country
Palestine (Gaza Strip)
Degree
Master
Degree Date
2016
English Abstract
In the present work magnetic, electric and dielectric properties are investigated for mixed ferrite Li0.5(1-x)ZnxFe2.5-0.5xO4 ( where x=0.0, 0.2, 0.4, 0.6, 0.8 and 1) which are prepared from high purity oxides using standard ceramic technique.
The magnetization (M) is measured at room temperature in the range of the applied field from 148 A.m-1 up to 1856 A.m-1.
The results indicated that the magnetization increased as increasing Zn2+ ions for samples of (x ≤ 0.6) while samples of (x ≥ 0.8) were considered to be paramagnetic at room temperature which have no magnetization .
DC conductivity ( ) is measured as a function of temperature, the relation between ln with temperature indicates that the conductivity increases with increasing the temperature which prove that the samples has a semiconductor behavior.
Also the relation between lnT and temperature show a change in the slope which is attributed to the change of samples from ferrimagnetic to paramagnetic, Curie point, ( C T ).
To determine C T , the inductance was measured as a function of temperature.
The inductance increased until C T , then decreased sharply.
C T is found to decrease with increasing the Zn2+ ions.
Dielectric constant ( ), dielectric loss tangent ( tan ) and AC conductivity ( AC ) have been investigated in the frequency range of (10 10 )Hz 4 6 at room temperature.
It is found that the value of decreases continuously with increasing the frequency, while AC increases with increasing frequency until certain point then it seems to be constant with change of frequency.
Experimental results of tan show maxima points at certain frequency and these maxima found to be shifted to lower frequency.
Main Subjects
No. of Pages
77
Table of Contents
Table of contents.
Abstract.
Abstract in Arabic.
Introduction.
Chapter One : Theoretical background.
Chapter Two : Literature survey.
Chapter Three : Calculations and experimental techniqes.
Chapter Four : Results and discussion.
Conclusion.
References.
American Psychological Association (APA)
Abu Musa, Zanah Awdah Muhammad. (2016). Improvement of electric and magnetic properties for li spinel ferrite by divalent Zn2+ ions substitution. (Master's theses Theses and Dissertations Master). Islamic University, Palestine (Gaza Strip)
https://search.emarefa.net/detail/BIM-735358
Modern Language Association (MLA)
Abu Musa, Zanah Awdah Muhammad. Improvement of electric and magnetic properties for li spinel ferrite by divalent Zn2+ ions substitution. (Master's theses Theses and Dissertations Master). Islamic University. (2016).
https://search.emarefa.net/detail/BIM-735358
American Medical Association (AMA)
Abu Musa, Zanah Awdah Muhammad. (2016). Improvement of electric and magnetic properties for li spinel ferrite by divalent Zn2+ ions substitution. (Master's theses Theses and Dissertations Master). Islamic University, Palestine (Gaza Strip)
https://search.emarefa.net/detail/BIM-735358
Language
English
Data Type
Arab Theses
Record ID
BIM-735358
