1Rural Engg. College, Bhalki, Karnataka state, INDIA.
2Jaypraksh Narayan College of Engg, Mahaboobnagar, AP state, INDIA.
3Appa Institute of Engg. Technology, Gulbarga, Karnataka state, INDIA.
Cobalt ferrite (CoFe2O4) is known as a hard magnetic material with moderate magnetization. It is known for its high coercivity, great physical and chemical stability. Here, electrical and magnetic properties of cobalt ferrite were investigated to understand the conduction mechanism. Cobalt ferrite particles were synthesized by microwave route. The XRD analysis confirmed the formation of the ferrite structure. The room temperature hysteresis loops were taken on the present sample in the field of 108KOe using VSM. The DC resistivity was measured with a keithly 2010 electrometer using two probe method in the temperature range (0°C-450°C). The resistivity obtained here is very high. But the conductivity obtained is very low. The electrical conductivity results revealed a semiconductor behavior with the temperature. The impedance spectroscopy technique was employed to investigate the variation of real and imaginary part of impedances with different temperatures at four different frequencies 1 KHz, 10 KHz, 100 KHz and 1 MHz. All possible mechanisms contributing to the results have been discussed in this paper.
Microwave route, Cobalt ferrite, hysteresis, Resistivity, Conductivity, impedance spectroscopy
