Abeer Kamal Abdelaziz Ali <br/><br/>
Effect of rare earth ion substitution on the electric and magnetic properties of mn - zn ferrite /  
 تأثير احلال العناصر الارضية النادرة على الخواص الكهربية والمغناطيسية لفريت المنجنيز زنك 
Abeer Kamal Abdelaziz Ali ; Supervised M.A.Ahmed , E.Ateia Elfarahaty , L.M.Salah 
 - Cairo :   Abeer Kamal Abdelaziz Ali ,   2004 
 - 178 P :   ill. ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty Of Science - Department Of Physics 
<br/><br/> The ferrite samples with the general formula Mn1 - xZnxRyFe2 - yO4 , where R is the rare earth element , x and y are variables were prepared by the standard ceramic double sintering technique All prepared samples were presintered at 900C for 30 hours with a heating rate of 4C / min and the final sintering were performed at 1200C for 50 hours with the same rate as that of presintering 
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<br/><br/><label>Subjects--Index Terms: </label>Electric and magnetic Properties of mn - zn ferrite