Synthesis, Characterization and Activation energy of Nano-(GO)x/(Cu,Tl)-1234 Superconducting Composites

• Published in: Journal of low temperature physics 2022, Vol.206 (3-4), p.210-231
• Main Authors: Anas, M., El-Shorbagy, Ghada A., Abou-Aly, A. I., Khalaf, A.
• Format: Article
• Language: English
• Subjects: Activation energy; Characterization and Evaluation of Materials; Composite materials; Condensed Matter Physics; Diffraction patterns; Electrical properties; Electron diffraction; Electrons; Fourier transforms; Graphene; High resolution electron microscopy; Low temperature physics; Magnetic Materials; Magnetism; Physics; Physics and Astronomy; Pressure; Superconductivity; Transition temperature; Transmission electron microscopy; X ray powder diffraction; X-ray diffraction
• ISSN: 0022-2291; 1573-7357
• DOI: 10.1007/s10909-021-02646-z

Nano-graphene oxide, nano-(GO), was prepared via a modified Hummer’s method. Hence, superconducting composites of type (GO) x /(Cu 0.25 Tl 0.75 )Ba 2 Ca 3 Cu 4 O 12− δ , x  = 0.00, 0.25, 0.50, 0.75, 1.00, 1.50 and 2.00 wt%, were prepared via the solid-state reaction technique at 850 °C under ambient pressure. The prepared nano-(GO) was characterized using X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy, transmission electron microscopy, high-resolution transmission electron microscopy and the selected-area electron diffraction pattern. The composites samples of type (GO) x /(Cu 0.25 Tl 0.75 )Ba 2 Ca 3 Cu 4 O 12− δ were characterized using XRD and scanning electron microscopy. The electrical properties of the prepared samples were investigated using the electrical resistivity measurements. The results showed that the samples retained their superconductivity for all x values with a maximum enhancement in the phase formation, the superconducting transition temperature and the activation energy at x  = 0.75 wt%.