Phase separation in Nd2-χCeχCuO4. Evidence for superconductivity at a single composition

P. Lightfoot*, D. R. Richards, B. Dabrowski, D. G. Hinks, Shiyou Pei, D. T. Marx, A. W. Mitchell, Ying Zheng, J. D. Jorgensen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

72 Citations (Scopus)

Abstract

A series of samples with bulk compositions Nd2-χCeχCuO4, 0≤χ≤0.25, have been examined by pulsed neutron and high-resolution synchrotron X-ray diffraction. The diffraction data show that single phase material is formed only for the undoped compound, Nd2CuO4, and (possibly) for the optimum superconducting composition, χ≈0.165. Other samples appear to be a mixture of this superconducting composition and non-superconducting material of other compositions. The phase separation cannot be explained in the context of an equilibrium phase diagram and, thus, must result from non-equilibrium behavior during synthesis.

Original languageEnglish
Pages (from-to)627-636
Number of pages10
JournalPhysica C: Superconductivity and its applications
Volume168
Issue number5-6
DOIs
Publication statusPublished - 1 Jul 1990

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