Single phase samples of Tl1-xBixSr2CuO5±δ for 0.2≤x≤0.5 have been prepared under various synthetic conditions and characterized by X-ray diffraction, electrical resistivity, magnetic susceptibility and TGA measurements. Superconductivity with a Tonsetc at 45 K has been found in samples of 0.2≤x≤0.3 which are quenched from 850°C into liquid nitrogen and then annealed at 400°C for 1 h in air. In the range 0.2≤x≤0.5, both semiconducting and metallic phases can be prepared. In general, samples quenched from 850°C to liquid nitrogen temperature are semiconducting; semiconducting samples annealed in air or O2 for longer periods and at higher temperatures yield metallic phases. The effect of various preparation conditions on the structural and physical properties of Tl1-xBixSr2CuO5±δ are discussed.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering