Abstract
The AC conductivity and complex impedance spectroscopy of CuO-doped (Ba0.5Sr0.5)TiO3 ceramic were investigated. X-ray diffraction analysis showed that CuO-doped (Ba0.5Sr0.5)TiO3 has a perovskite structure without any pyrochlore phase. Frequency dependent dielectric permittivity was discussed at a different temperature range. The activation energy was calculated and discussed through the Arrehnius equation from the ac conductivity with different frequency plots. CuO-doped (Ba0.5Sr0.5)TiO3 ceramics have a negative temperature coefficient of resistivity. Dependence of impedance spectroscopy on frequency and temperature showed that the conduction process in the CuO-doped (Ba0.5Sr0.5)TiO3 ceramic follows the thermally activated conduction mechanism.
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