Structural and electrical properties of Ba-substituted spinel ferrites

Spinel ferrites with configuration Co1-xBaxFe2O4 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) were created by sol-gel technique. X-ray diffraction pattern showed that the entire specimen possessed singular phase. The standards of lattice constant increased, while densities as well as porosity decreased with the increment of barium ions. The room temperature resistivity and activation energy increased with the addition of barium ions. The temperature dependent resistivity presented the decreasing trend with the increase of barium ions which proves its semiconducting nature. The magnetization decreased while coerecivity was increased with the substitution of barium ions, as applied field changed from -2 KOe to +2 KOe. Dielectric properties were also measured from 3 MHz to 1 G Hz. Due to high value of dc resistivity and low dielectric loss, these samples might be suitable for highfrequency devices.

Automated summary

Spinel ferrites with varying degrees of barium substitution were synthesized using sol-gel technique, leading to changes in lattice constant, density, resistivity, activation energy, magnetization, and coercivity. The addition of barium ions resulted in a decrease in temperature dependent resistivity, indicating semiconducting nature. High dc resistivity and low dielectric loss suggest these samples may be suitable for high-frequency devices.