Preparation and investigation of the magnetic properties of strontium ferrite doped with aluminum

مقدم أطروحة جامعية

Daas, Wisam Ibrahim

مشرف أطروحة جامعية

al-Busul, Ibrahim

أعضاء اللجنة

Mahmud, Sami
al-Nasir, Husam
al-Jamal, Ahmad Fawwaz

الجامعة

جامعة آل البيت

الكلية

كلية العلوم

القسم الأكاديمي

قسم الفيزياء

دولة الجامعة

الأردن

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2011

الملخص الإنجليزي

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.

التخصصات الرئيسية

الفيزياء

الموضوعات

• الخواص المغناطيسية
• الألومنيوم

عدد الصفحات

57

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-321883