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- W2026615079 abstract "The effect of heat treatment on the superconducting properties of porous Y(Ba 1-x Ca x ) 2 Cu 3 O δ with Ca substitution x = 0.00, 0.10, 0.20, and 0.30 via a solid-state reaction method have been investigated. The superconducting parameters, zero critical temperature, T c zero and critical current density, J c were measured by the standard four point probe method in the temperature range from 20 K to 300 K, while the morphology of the samples was investigated by field emission scanning electron microscopy (FESEM). In addition structural identification was also investigated. All the samples received a heat treatment at 900 °C for 5 hours, and the J c improved from 1.410 A/cm 2 to 7.013 A/cm 2 for x = 0.30 at 60 K. The heat treatment process did not change the morphology, while the crystallographic structure remained orthorhombic structure. The lattice parameter c decreased, and the volume of the unit-cell with increasing Ca substitution.The heat treatment also led to an improvement in oxygen content to nearly 7." @default.
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- W2026615079 date "2014-02-01" @default.
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- W2026615079 title "Effect of Heat Treatment on Ca Substitution in a Porous Y(Ba<sub>1-x</sub>Ca<sub>x</sub>)<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ </sub>Superconductor" @default.
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- W2026615079 doi "https://doi.org/10.4028/www.scientific.net/amr.895.71" @default.
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