Further Increase of T c in Y-Ba-Cu-O Superconductors

Topal, Uğur; Akdoğan, Mustafa

doi:10.1007/s10948-011-1129-1

Cited by 11 publications

(5 citation statements)

References 12 publications

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“…The results of line fitting demonstrated that α = 3 shows a more appropriate fit to the curves. Also, the slight difference between α = 2 and 3 suggests that the system we studied is two-dimensional [ 15 , 16 ].…”

Section: Resultsmentioning

confidence: 99%

RETRACTED: Flux Dynamics in Y358 Superconductors

Heidari¹,

Vedad²,

Heidari³

et al. 2012

Materials

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Thermally activated flux motion and specific electric resistance in Y358 were studied under different magnetic fields ranging from 0 to 15 kOe. Through investigating the broadening of normal-superconducting transition, we found that the thermally-activated-flux-motion model can describe the electronic effect near the superconducting transition temperature. By modifying this model, specific electric resistance at different magnetic fields was calculated.

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Section: Resultsmentioning

confidence: 99%

RETRACTED: Flux Dynamics in Y358 Superconductors

Heidari¹,

Vedad²,

Heidari³

et al. 2012

Materials

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“…Although, the slight increase in oxygen concentration could be change the physical properties of these superconductors. However, the values of a, b, V and d of these alloys are in agreement with literatures [14][15][16][17][18][19][20]; whereas c agrees with literatures [14][15][16].…”

Section: Experimental Methodologysupporting

confidence: 92%

The influence of Ag doping on structrual and electrical resistivity properties of Y3Ba5Cu8O18 high temperature superconducting alloys

Puwanasingam¹,

Fernando²,

Ragel³

2019

J. Sc.

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This research paper describes the synthesis of a series of Y-based superconducting alloys doped with Ag oxide. The superconducting alloys were synthesized by Gholipour et al. (2012), Tavana et al. (2010) and Khosroabadi et al. (2014) using sol-gel reaction technique. In the present research superconducting alloys were synthesized by solid state reaction technique. These alloys were investigated by using X-ray diffraction pattern (XRD), Scanning Electron Microscope (SEM) image and the electrical resistivity, , measurements. The  measurements above room temperature of Y358 alloys shows metal behavior in the normal state. The YBCO alloy family was exposed having the CuO2 planes and the Cu-O chains. Increasing the number of the CuO2 planes and the position of the Cu-O chains have positive effects on the significance of the transition temperature in the Ybased alloys. The X-ray diffraction patterns were accepted by Joint Committee of Powder Diffraction Standards (JCPDD) database software, which the Ag ions substitute in symmetrical phase of the alloy. The replacement of the Ag ions in the CuO2 plane of symmetric phase has been associated with the Ag ions in the Y123 alloys, which replace in the Cu-O chain. The  of these alloys were measured employing four-probe point technique and the (T) curves agreed the transition temperature develops above 100 K.

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“…The results depicted the existence of Ca in the Ca-doped samples and the absence of sucrose in samples with low density. It proved that the addition of 0.2 g of sucrose had burnt at 400 ̊ C for the 2-hour process [6]. Furthermore, the temperature dependence on resistance in the range of 20 -300 K for samples with high and low densities are shown in Fig.…”

Section: Resultsmentioning

confidence: 75%

Electrical and Structural Properties of Ca Substitution in High and Low Density Y(Ba1-xCax)2Cu3O7-δ Superconductor

Hashim

Norazidah

Kasim

et al. 2016

MSF

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The effect of Ca substitution on the electrical and structural properties in high and low density Y(Ba1-xCax)2Cu3Oδ where x = 0.00, 0.10, 0.20 and 0.30 via solid state reaction method has been investigated. The electrical properties, elemental analysis, and structural identification were measured by the four-point probe technique, energy dispersive x-ray (EDX) and X-ray diffraction (XRD) respectively. The electrical properties such as critical temperature (Tc) and critical current density (Jc) were found to be strongly dependent in both high and low densities Y(Ba1-xCax)2Cu3O7-δ. These parameters were decreased monotonously with the increasing of Ca substitution. An obvious results of the Ca-doped samples can be seen in x = 0.20 where Tc zero of high density sample is 77 K, which is higher than that of the low density sample that occurred at 73 K. Meanwhile, Jc at 60 K for high density is 1.842 A/cm2 compared to 1.410 A/cm2 in low density sample. EDX analysis confirmed the existence of Ca in all doped samples. The crystallographic structure remained orthorhombic and the volume of unit cell increased towards further increased of Ca concentration.

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Further Increase of T c in Y-Ba-Cu-O Superconductors

Cited by 11 publications

References 12 publications

RETRACTED: Flux Dynamics in Y358 Superconductors

RETRACTED: Flux Dynamics in Y358 Superconductors

The influence of Ag doping on structrual and electrical resistivity properties of Y<sub>3</sub>Ba<sub>5</sub>Cu<sub>8</sub>O<sub>18</sub> high temperature superconducting alloys

Electrical and Structural Properties of Ca Substitution in High and Low Density Y(Ba<sub>1-x</sub>Ca<sub>x</sub>)<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> Superconductor

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