Ferrites are used in wide range of technological applications like core transformer, recorder heads, memory chips, antenna rod etc. due to their magnetic and electric properties. The crystal structure of these materials controls their physical properties. Ferrites have a very low conductivity, which is one of the considerations for microwave applications. The basic electrical and magnetic properties of the ferrites depend upon method of preparation site and valence distribution etc.
Among all the ferrites, copper ferrite is interesting and have many technological applications because copper ferrite shows tetragonal structure , changing semi conductive properties and electrical switching when heat-treated under different conditions. Therefore, the electrical and magnetic properties of copper ferrite can be changed with its structure. Further, the presence of Jahn-Teller ion Cu2+ in copper ferrite can lead to a change in electrical and magnetic properties. The influence of Jahn-Teller ion Cu2+ at the octahedral [B] sites can be modified by trivalent and tetravalent ions. Magnetic dilution due to substitution of non-magnetic atoms gives rise to interesting magnetic structures in compounds with spinel structure.