| Autor: |
M. Marezio, Bertram Batlogg, L. W. Rupp, R. M. Fleming, Pierre Bordet, W. F. Peck, J. J. Krajewski, Robert J. Cava, Hidenori Takagi |
| Rok vydání: |
1992 |
| Předmět: |
|
| Zdroj: |
Physica C: Superconductivity. 199:65-72 |
| ISSN: |
0921-4534 |
| DOI: |
10.1016/0921-4534(92)90541-j |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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