Abstract
Evolution of conductivity σac vs. of the frequency at various temperatures.
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•Ba0.95Ca0.05Ti0.97Y0.04O3(BCTYO) was synthesized by the classical solid state method.•Rietveld analyzes by XRD prove that the sample presents a single phase with pace group Pm-3m.•The electrical conductivity obey Jonscher’s universal power law.•The modulus formalism demonstrates the existence of non-Debye relaxation process.
Ba0.95Ca0.05Ti0.97Y0.04O3 solid solution has been fabricated by solid state method to investigate physical properties. The X-ray diffraction characterization at room temperature (RT) indicated that single-phase perovskite was obtained and no appreciable secondary phase was found. XRD analysis revealed that the desired main phase of our sample crystallizes in a cubic phase with (Pm 3¯ m) space group. The SEM image proves that the material is dense with high crystallinity and the particle size of the grains is 710 nm. The DC-conductivity enhances significantly with temperature confirmed that our sample has a semiconductor behavior. The electric modulus spectroscopy results discerned a thermally activated relaxation allocated to the phenomenon of space charge relaxation of the Maxwell-Wagner (M−W) type and the non Debye relaxation processes. The experimental results indicate that (ε) and the dissipation factorreduced along the rising in frequency. The demeanor observed can be clarified by extrinsic Maxwell-Wagner effects answerable for the electric conduction.