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This report covers a clear description of the synthesis and characterizations (dielectric, electrical, ferroelectric, and optical) of complex ferroelectrics comprising two perovskites BaTiO3and Bi0.5K0.5TiO3with a chemical composition (Ba(1−x)Bix/2Kx/2)TiO3(x = 0, 0.05, 0.1, 0.15). All the compounds were synthesized by the conventional solid state route (calcinations at 1100 °C and sintering at 1200 °C). The dielectric and electrical properties in a wide range of temperatures and frequencies deduce various interesting properties such as high dielectric permittivity, low tangent loss, relaxation phenomena, non-Debye type conduction, and negative temperature coefficient of resistance. The dielectric parameters show an increase in ferroelectric transition temperature over frequency and temperature, making it suitable for high temperature applications. The ferroelectricity of the compounds is confirmed by the polarization vs. electric field loops. Nyquist plots discuss the contribution of grain and grain boundary by fitting it with the help of ZSimpWin software. Low energy band gap can lead to application in optoelectronic devices.

The current study endeavors to fabricate a lead-free bismuth-based layered multifunctional material denoted as CaBiGdNbVO9(CBGNVO), achieved through synthesis and characterization. X-ray diffraction analysis indicates a polycrystalline nature for the developed system, exhibiting orthorhombic crystal symmetry. Structural parameters obtained are a= 14.5781 Å, b= 27.3108 Å, c= 3.7148 Å, and V= 1479.01 Å3. Electron microscopic examination reveals compactness and uniform distribution of grains of similar sizes across the pellet sample surface. Electrical data analysis, encompassing relative permittivity, loss tangent, and impedance as functions of temperature and frequency, elucidates dielectric relaxation and conduction mechanisms within the material. These findings suggest the potential suitability for various applications, such as temperature sensors and bandwidth regulation. Examination of electronic charge carriers reveals a short-range order, validated through complex modulus and impedance spectrum analysis. A comprehensive investigation into resistive, capacitive, and microstructural characteristics provides valuable insights, positioning the material as a viable electronic component for device fabrication.