TY - GEN AU - Hisham Khalafalla Mohammed AU - Mohammed Ali Ahmed , AU - Mona Kamal Aouf , AU - Roshdi Seoudi Mohammed , TI - Effect of rare earth Ion substitution on the atomic migration and superexchange interaction of Cr - Substituted Cu - Ferrite / PY - 2007/// CY - Cairo : PB - Hisham Khalafalla Mohammed , KW - Ferrite KW - Magnetic properties KW - Rare earth elements N1 - Thesis (M.Sc.) - Cairo University - Faculty Of Science - Department Of Physics; Issued also as CD N2 - 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 UR - http://172.23.153.220/th.pdf ER -