Through careful material synthesis and powder X-ray diffraction characterization it is shown that (1) there are no significant metal atom nonstoichiometries in the superconducting T' structure phase in the Nd-Ce-Cu-O system which allow it to deviate from the line of composition Nd2-xCexCuO4-δ when synthesised under optimal conditions, and (2) to a very high resolution, the Nd2-xCexCuO4-δ T' phase is a true chemical solid solution, with no composition regions of phase separation, over the range of Ce doping relevant to physical property characterization, 0≤x≤0.175. High resolution diffraction measurements reveal a subtle distribution of average c-axis lengths for Nd1.85Ce0.15CuO4-δ not present for other compositions in the solid solution.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering