Heba Ismail Abdelkareim <br/><br/>
Synthesis and characterization of CoFe2O4/ReFeO3 Multiferroic nanocomposites /  
 CoFe2O4/ReFeO 3تحضير و توصيف لمتراكب مالتيفرويك مكون من  
Heba Ismail Abdelkareim ; Supervised Ebtesam Ateia , Mohamed khaiaralla , Salwa Fahim   
 - Cairo :   Heba Ismail Abdelkareim ,   2022 
 - 161 P .  :   charts,facsmilies ;   25cm 
<br/><br/>Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Physics 
<br/><br/> The citrate-nitrate auto-combustion method is considered to prepare Lanthanum adopted rare earth (RE) elements to form RE0.7La0.3FeO3; RE = Ce, Pr, Nd, Sm and Gd) nanoparticles and CoFe2O4 samples. Then the nano composites consisted of Sm0.7La0.3FeO3 and CoFe2O4 with different composition ratios were formed. A thorough study of the structure, morphology and magnetic properties of the inspected samples has been investigated using XRD, HRTEM and VSM, respectively. Rietveld investigations show that Introducing rare earth ions into LaFeO3 decreases the FeOFe angle. Moreover, VSM results indicate that coercivity of Sm0.7La0.3FeO3 is remarkably improved relative to the parent sample. The magnetic properties of various nanocompsites at room temperature are discussed with extensive elaboration on the critical size and the magnetocrystalline anisotropy constant 
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<br/><br/><label>Subjects--Topical Terms: </label><br/> Nanocomposites ( materials)
<br/><br/><label>Subjects--Index Terms: </label>citrate autocombustion method Multiferroic nanocomposites