Modulus spectroscopy study of a double perovskite oxide Sr2CeNbO6: Frequency and time domain analyses
作者： Chandrahas Bharti , Alo Dutta , T.P. Sinha
DOI: 10.1016/J.SOLIDSTATESCIENCES.2012.04.025
关键词: Power law 、 Nuclear magnetic resonance 、 Activation energy 、 Relaxation (physics) 、 Monoclinic crystal system 、 Condensed matter physics 、 Spectroscopy 、 Atmospheric temperature range 、 Materials science 、 Crystal structure 、 Distribution function
摘要: Abstract A polycrystalline rare earth double perovskite oxide, strontium cerium niobate, Sr2CeNbO6 (SCN) is synthesized by solid state reaction technique for the first time. The X-ray diffraction pattern of sample shows monoclinic structure at room temperature. relaxation dynamics conductive process present in SCN investigated a temperature range from 303 to 703 K and frequency 100 Hz 1 MHz using modulus spectroscopy. time decay function φ ( t ) obtained values dependence electric (imaginary component, M″) domain, which found be Cole–Cole distribution function. experimental data are fitted Kohlrausch-Williams-Watts exponential various characteristic parameters analysed. activation energy whole suggest existence mechanism (a process), may interpreted ion hopping between neighbouring sites within crystal lattice. conductivity spectra temperatures considering power law.
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