Samples of nominal composition (Pb0.5Cd0.5) (Sr2-xBax) (Ca0.5Y0.5)Cu2Oy (0≤x≤0.5) synthesised at 920°C in air are investigated. XRD shows the samples to exhibit the tetragonal 1212-phase. The lattice parameters, the width of the Raman peak for the apical-0(2) vibration mode and the infrared absorption peak for the 0(3) vibration mode, all increase with increasing Ba doping level. In the doping range (0.0≤x≤0.5), there is a transition from insulator to superconductor. The Raman shift and the wavenumber of the infrared absorption for the phonon peaks appear to change regularly.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering