The PhD student (Asraa Adnan Najim) discussed her thesis entitled (Preparation and Characterization of Doped MgO Nanoparticles). The discussion was held on the discussions hall / building C / Department of Materials Engineering / University of Technology on Tuesday (8/6/2021). The discussion committee was formed of the teaching staff listed:
|
Names |
Position in the Committee
|
|
Prof. Dr. Ahmed Mohamed Hassan Al-Ghabban |
Chief |
|
Prof. Dr. Shehab Ahmed Zidan |
Member |
|
Assist. Prof. Dr. Shaima Jaber Mariam |
Member |
|
Prof. Dr. Ghazi Kamal Saed |
Member |
|
Assist. Prof. Dr. Farhad Muhammed Othman |
Member |
|
Assist. Prof. Dr. Fadel Abed Rasan |
Member-supervisor |
|
Prof. Dr. Shaker Jahil Idris |
Member-supervisor |
The thesis was scientifically evaluated by Assist. Prof. Dr. Ayad Mourad Takhakh/ Al-Nahrain University/ College of Engineering, and linguistically by Assist. Prof. Dr. Alaa Abdel Hadi Jaber/ University of Technology / Office of Vice chancellor for scientific and postgraduate affairs.
The discussion of the thesis was conducted in a scientific atmosphere and a PhD degree with grade of pass was awarded to the student after the completion of all the corrections that have been decided by the examiners.
Abstract:
The magnetization of bulk MgO shows diamagnetism behavior while MgO-NPs shows a unique type of magnetization named room temperature ferromagnetic (RTFM) or "d0" ferromagnetism". This magnetization was obtained by doping MgO-NPs with different concentration of Pb+2 and Sc+3 ions to obtain (Mg(1-x)PbxO)-NPs, (0≤x≤0.03), and (Mg0.97Pb(0.03-y)ScyO)-NPs, (0≤y≤0.03), respectively. All samples have been prepared by modified Pechini method.
The undoped and doped samples have been analyzed by VSM, XRD, FTIR, Raman spectroscopy and FESEM-EDS.
The result of experimental work show that the maximum saturation magnetism (Ms) was for 1.5 % Pb (Mg0.985Pb0.015O) sample for (Mg(1-x)PbxO)-NPs samples group and 3% Sc (Mg0.97Sc0.03O) sample for (Mg0.97Pb(0.03-y)ScyO)-NPS samples group.
