Abstract
Abstract A series of samples of the system Co1-xZnxFe2O4 (x = 0.0, 0.2, 0.3, 0.4, 0.6, 0.8) was prepared by the usual ceramic technique. DC resistivity measurements were carried out and the drift mobility μ at different temperatures was calculated before and after irradiation with Co-60 gamma rays of dose 106 rad. The activation energy for different samples before and after radiation are presented. As expected, the values of DC conductivity and the electronic mobility of charge carriers increase as a result of irradiation with γ-rays. The number of ferrous ions Fe2+ on the octahedral sites plays a dominant role in the increase of the DC conductivity due to the irradiation. The results agree well with other work explaining the interaction mechanism of ionizing radiation with Co-Zn ferrite. From conductivity measurements the activation energy for carrier liberation was evaluated.
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