000 02484cam a2200349 a 4500
003 EG-GiCUC
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008 161208s2016 ua dh f m 000 0 eng d
040 _aEG-GiCUC
_beng
_cEG-GiCUC
041 0 _aeng
049 _aDeposite
097 _aM.Sc
099 _aCai01.12.20.M.Sc.2016.Ya.O
100 0 _aYasser Abdelkhaleq Abdelgawad Saeid
245 1 0 _aOptimizing the physical Properties of orthoferrite RFe(₁₋x)AlxO₃ R=(Sm, Y, Gd) to be Suitable in Many Applications /
_cYasser Abdelkhaleq Abdelgawad Saeid ; Supervised Mohamed Ali Ahmed , Ebtesam Ateia Elfarahaty , Mohamed Khairallah Abdelmaksoud
246 1 5 _a ليناسب العديد من التطبيقات RFe(₁₋x)AlxO₃ R=(Sm, Y, Gd) تحسين الخواص الفيزيائية للأورثوفيريت
260 _aCairo :
_bYasser Abdelkhaleq Abdelgawad Saeid ,
_c2016
300 _a121 P. :
_bcharts , facsimiles ;
_c25cm
502 _aThesis (M.Sc.) - Cairo University - Faculty of Science - Department of Physics
520 _aThe main aim of this thesis is to prepare orthoferrite of the formula SmFe(₁₋x)AlxO₃, where 0 {u2264} x {u2264} 0.15 (step 0.05) with quality samples using the double sintering ceramic technique at two groups. One of the main of this work is to introduce Al³⁺ ions to substitute some of Fe³⁺ occupied B-site of the perovskite structure and study the influence of this substitution on structural, magnetic, electrical and optical properties of the investigated orthoferrite to obtain the optimum concentration of Al3+ content. The novelty of this work is To tailor different orthoferrite materials with different rare earth elements and study the influence of ionic radii of rare earth cation at A-site substitution of RFe₀.95Al₀.₀5O₃ orthoferrite, where R = Sm, Y and Gd rare earth cations on the physical properties to meet different needs in many applications. We are also aiming to find out detailed characteristics that might help in suggesting new applications for such antiferromagnets
530 _aIssued also as CD
653 4 _aFESEM
653 4 _aOrthoferrite
653 4 _aStructural properties
700 0 _aEbtesam Ateia Elfarahaty ,
_eSupervisor
700 0 _aMohamed Ali Ahmed ,
_eSupervisor
700 0 _aMohamed Khairallah ,
_eSupervisor
856 _uhttp://172.23.153.220/th.pdf
905 _aNazla
_eRevisor
905 _aSoheir
_eCataloger
942 _2ddc
_cTH
999 _c58930
_d58930