Electric and magnetic properties for Zn-Al spinel ferrite

Other Title(s)

الخواص الكهريية و المغناطيسية لأسبنل زنك-ألمنيوم فيريت

Dissertant

Mutayyir, Sami Mahir Tawfiq

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

2016

English Abstract

In the present work magnetic, electric and dielectric properties were investigated for mixed ferrite Zni-xAlo.5xFe2+o.5xO4 (where x=0.0, 0.2, 0.4, 0.6 and 0.8) which are prepared using high purity oxides by standard ceramic technique.

The ionic radii of tetrahedral (Td) and octahedral (Oh) sites were calculated for all samples, they found to decrease linearly with increasing of the Al3+ ions.

DC conductivity (a) was measured as a function of temperature, which indicated that a increases with increasing the temperature which prove that the samples have a semiconductor behavior.

The inductance (L) was measured as a function of temperature, which for all samples didn't change.

This means that there is no transition and magnetization, which implies the samples are paramagnatic at room temperture.

Dielectric constant [real ( s'), imaginary ( s" ) and complex ( s *)], dielectric loss tangent (tanS) and AC conductivity (aAC) were investigated over the frequency range of (104 - 106)Hz at room temperature.

We found that the relation of s', s"and s*and tanS versus the frequency is changed exponentially, i.e the value of s', s"and s* and tanS decreases continuously with increasing the frequency, while aAC increases with increasing frequency.

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Main Subjects

Physics

No. of Pages

64

Table of Contents

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Language

English

Data Type

Arab Theses

Record ID

BIM-902746