Synthesis, crystal structure, dielectric and optical properties of a new rare earth double perovskite: Ca2CeNbO6

摘要: Abstract In order to develope and understand the phenomena involved in producing advanced materials, a rare earth double perovskite oxide calcium cerium niobate, Ca 2 CeNbO 6 (CCN) is synthesized for first time. The x-ray diffraction pattern of CCN at room temperature (300K) shows orthorhombic structure, with lattice parameters, =9.36A, b =6.61A c=5.88A α = β γ 90°. A scanning electron micrograph formation grains average size ∼2μm. Impedance spectroscopy Fourier transform infrared are applied investigate dielectric optical properties CCN. frequency-dependent electrical data analyzed framework conductivity modulus formalisms. experimental real part permittivity ( e ′) imaginary electric M ″) fitted Davidson-Cole equation explore idea relaxation (conduction) mechanism spectra follow power law. scaling behaviour suggests that describes same various temperatures.