Electrical and dielectric behaviour of chromium substituted nickel ferrite

摘要

The variation of resistivity and thermo emf with temperature for the ferrites with NiCrxFe2-xO4 has been studied. The conduction process in the first region 450 K is attributed to impurity conduction while for second region 450 K due to polarons. The samples show p-type and p-n transition takes place at 450 – 500 K. Abnormal dielectric behavior is observed for the samples with x = 0.8 and 1.0 at 10 MHz and 2 MHz respectively. This is due to increase of P-type carriers.