Effects of Nickel substitution on crystalline structure and superconducting properties of YBa2Cu3O7- ceramics.
Journal Title: Journal of New technology and Materials - Year 2017, Vol 7, Issue 2
Abstract
In this study, nickel-substituted Y〖Ba〗_2 (〖Cu〗_(1-x) 〖Ni〗_x )_3 O_(7-δ) ( 0 ≤x ≤4 at.%) superconductor samples were prepared by the conventional solid state reaction method. The effects of Ni substitution on the structure, microstructure, superconducting properties and Raman modes of Y〖Ba〗_2 (〖Cu〗_(1-x) 〖Ni〗_x )_3 O_(7-δ)systemshavebeeninvestigated. The Ni-substituted induces a porous, finer grained structure. The energy dispersive X-ray spectroscopy (EDS) analysis confirmed the incorporation of nickel into the grains. RamanspectroscopyshowsthattheNidopingenhancesthedisorderatthe〖CuO〗_2planes and decreases the oxygen content by the depletion from the CuO chains. The temperature dependent resistivity measurementsρ(T) show a deviation from linearity, due to the opening of a pseudogap. DC susceptibility measurements show that the transition temperature decreases with increasing Ni content.
Authors and Affiliations
Souheila Chamekh, Abderrahmane Bouabellou, Yalçin Elerman, Melike Kaya, Ilker Dincer
Keywords
Related Articles
- EP ID EP259294
- DOI -
- Views 86
- Downloads 0
Electrical characterization of passivation layers for p-type multi crystalline silicon EWT solar cells by numerical simulation
In this study, the dielectric effects on solar cell efficiency were investigated. Different materials, such as Al2O3, HfO2, TiO2 and SiO2, were deposited by various techniques on the front side of a p-type EWT (Emitter W...
Optimization of a GaAsN ternary alloy based solar cell for high efficiency
We report on the photovoltaic characteristics of solar cells based on GaAs1-xNx grown on gallium arsenide. The GaAsN is a recently developed novel solar cell material for its promising tunable band gap of 1.42 eV to 3.4...
Optoelectronic and magnetic properties of the ortho-perovskite GdRuO3 using DFT+U with spin-orbit coupling: predictive study
We have investigated the structural, magnetic, and optoelectronic properties of the ortho-perovskite GdRuO3 using the accurate full-potential linearized augmented plane wave (FP-LAPW) method based on the density function...
Theoretical investigation of δ-doped double barriers GaAs/AlGaAs RTDs at varying device geometry and temperature dependence
In this article, we proposed a new concept of Si-delta doping in double barrier resonant tunneling diode heterostructure. The double barrier resonant tunneling diodes (DBRTDs) are investigated through the technique of co...
Numerical investigation of three-dimensionalheat transfer and natural convection in the sapphire melt for Czochralski growth process
A three-dimensional numerical study of the convection heat transfer in a simulated Czochralski system is conducted .In this work, the numerical investigation were performed to analyze the free convection in the Czochrals...