Preparation and investigation of the magnetic properties of strontium ferrite doped with aluminum
Dissertant
Thesis advisor
Comitee Members
Mahmud, Sami
al-Nasir, Husam
al-Jamal, Ahmad Fawwaz
University
Al albayt University
Faculty
Faculty of Sciences
Department
Department of Physics
University Country
Jordan
Degree
Master
Degree Date
2011
English Abstract
In this work, solid state reaction method was used to prepare pure and doped with Al (Aluminum) strontium hex ferrite (SrFei2-x AlxOi9).
The Al concentration (x) in the samples examined in this work was varied from x = 0.0 to x = 0.6.
The structure, morphology and the magnetic properties of the prepared samples were investigated.
Analyses of XRD measurements showed that all samples examined in this work of high quality, since the measured XRD patterns found to match the standard pattern for single phase of SrFei20i9. The lattice parameters a and c of SrFen_xAlxOi9 were calculated.
It was found that the replacement of Fe3+ with Al3+ ions in hexagonal strontium ferrite led to a negligible changes in lattice constant a, whereas the hexagonal lattice constant c found to decrease with increasing the substitution amount of Al.
The average crystallite size was also calculated using the XRD data.
It has been found that the average crystallite size of all samples is in the range 72-83 nm, and that Al+3 substitution for Fe+3 does not substantially affect the crystallinity of SrFei2-xAlxOi9. The morphology of the grains for all samples is investigated by the direct observation via scanning electron microscopy.
SEM data showed that, Al substitution in the concentration range reported in this work does not significantly influence the particle size distribution.
It has been found that particles close to spherical in shape with diameters extending from 200 nm to about 1 um.
The magnetic data showed that the doping of strontium with Al leads to a decrease in saturation magnetization and cluster formation.
Also it was found that the doping of strontium ferrite with Al leads to an increase in the coercivity as a result of increasing of the anisotropy field.
Main Subjects
Topics
No. of Pages
57
Table of Contents
Table of contents.
Abstract.
Chapter One : introduction.
Chapter Two : theoretical background.
Chapter Three : experimental.
Chapter Four : results and discussion.
Chapter Five : conclusions.
References.
American Psychological Association (APA)
Daas, Wisam Ibrahim. (2011). Preparation and investigation of the magnetic properties of strontium ferrite doped with aluminum. (Master's theses Theses and Dissertations Master). Al albayt University, Jordan
https://search.emarefa.net/detail/BIM-321883
Modern Language Association (MLA)
Daas, Wisam Ibrahim. Preparation and investigation of the magnetic properties of strontium ferrite doped with aluminum. (Master's theses Theses and Dissertations Master). Al albayt University. (2011).
https://search.emarefa.net/detail/BIM-321883
American Medical Association (AMA)
Daas, Wisam Ibrahim. (2011). Preparation and investigation of the magnetic properties of strontium ferrite doped with aluminum. (Master's theses Theses and Dissertations Master). Al albayt University, Jordan
https://search.emarefa.net/detail/BIM-321883
Language
English
Data Type
Arab Theses
Record ID
BIM-321883
