Hisham Khalafalla Mohammed <br/><br/>
Effect of rare earth Ion substitution on the atomic migration and superexchange interaction of Cr - Substituted Cu - Ferrite /  
 تاثير احلال ايونات العناصر الارضية النادرة على الهجرة الذرية و التفاعل التبادلى الفائق لفريت النحاس المطعم بالكروم 
Hisham Khalafalla Mohammed ; Supervised Mohammed Ali Ahmed , Roshdi Seoudi Mohammed , Mona Kamal Aouf 
 - Cairo :   Hisham Khalafalla Mohammed ,   2007 
 - 135Leaves :   charts ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty Of Science - Department Of Physics 
<br/><br/> The aim of the present work is to study the effect of replacing Fe3+ ion in copper ferrite by Cr3+ ion with different concentration on the structural magnetic and electrical properties.Another purpose of this work is to throw light on the effect of rare earth type and concentration on the structural magnetic and electric properties of Cu - ferrite 
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<br/><br/><label>Subjects--Index Terms: </label>Ferrite Magnetic properties Rare earth elements