The Influence of Cu on the Dielectric Properties of NiZnFe<sub>2</sub>O<sub>4</sub> Synthesized by Solid State Reaction Method
- 1 Department of Physics, AL Neelain University, Khartoum, Sudan
- 2 Department of Physics, Faculty of Science, University of Khartoum, Khartoum, Sudan
- 3 Department of Physics, Al Baha University, Al Baha, Saudi Arabia
- 4 Faculty of Science, Northern Border University, Arar, Saudi Arabia
Abstract
The phase pure Copper Ferrite, Zinc Ferrite, and Nickel Ferrite were prepared from oxides of Ni, Cu, Zn, and Fe using traditional ceramic method. X-ray diffraction data were collected and the formation of the spinal phase structure was found. The lattice parameter was found to be 8.441 Å for Zn Fe 2 O 4 , 8.35 Å for Ni Fe 2 O 4 , and 8.349 Å for Cu Fe 2 O 4 . The Ni 0.4 Zn 0.6 Fe 2 O 4 ferrite was sintered at three different temperatures: namely 1100 ° C, 1200 ° C, and 1300 ° C and similar temperature control was applied to Cu 0.2 Ni 0.2 Zn 0.4 Fe 2 O 4 ferrite group. The energy band gap was calculated for Ni 0.4 Zn 0.6 Fe 2 O 4 and Cu 0.2 Ni 0.2Z n 0.4 Fe 2 O 4 and was found to be 3.657 eV and 4.889 eV, respectively. The dielectric properties were investigated over a wide range using impedance spectroscopy and were found to decrease with the increase of frequency. Similar behavior was observed with the sintering temperature. In the same manner, the electric conductivity was found to decrease with the increase of frequency and sintering temperature as well. On the other hand, the electric resistivity was found to increase with both frequency and the sintering temperature.
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