首页|Investigation of structural, dielectric, impedance and leakage current behaviour of green phase of yttrium barium copper oxide:Y2BaCuO5
Investigation of structural, dielectric, impedance and leakage current behaviour of green phase of yttrium barium copper oxide:Y2BaCuO5
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NSTL
Elsevier
Comprehensive study of structural, dielectric, electrical, and ferroelectric characteristics of Yttrium Barium Copper Oxide (Y2BaCuO5) ceramic, (accompanying phase of high-Tc superconductor YBa2Cu3O7-X can unravel plethora of fascinating applications. Y2BaCuO5 green phase cuprate has been prepared by employing ceramic fabrication technology. Room-temperature X-ray diffraction data of the polycrystalline sample suggests that it crystallizes in orthorhombic system in non-centrosymmetric Pbn2(1) spacegroup. The microstructure and elemental composition clearly illustrated by SEM micrograph and EDAX data. Frequency dependence of dielectric parameter has been discussed using Maxwell-Wagner model. Grain and grain boundary effects discussed using Nyquist plots; fitted to RQC and RC-RQC circuits. Temperature and Frequency dependent conductivity behaviour are explained using Arhenius equation and Jonscher power law. NSPT and CBH model of charge transport mechanisms observed. (I-V) charecteristics demonstrates semiconductor behaviour of Y2BaCuO5 and its suitability for rectifier applications. Existence of hysteresis loop at room and high temperature up to 200 C suggests ferroelectricity in Y2BaCuO5.
High-Tc superconductorGreen phase cuprateLeakage currentNSPT and CBH ModelMaxwell wagner effectMAGNETIC-PROPERTIESK0.5NA0.5NBO3SPECTROSCOPYRELAXATIONTRANSITIONMECHANISM
NSTL
Elsevier
