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

doi:10.1016/0921-4534(90)90087-U

Phase separation in Nd_2-χCe_χCuO₄. 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 journal › Article › peer-review

Abstract

A series of samples with bulk compositions Nd_2-χCe_χCuO₄, 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 language	English
Pages (from-to)	627-636
Number of pages	10
Journal	Physica C: Superconductivity and its applications
Volume	168
Issue number	5-6
DOIs	https://doi.org/10.1016/0921-4534(90)90087-U
Publication status	Published - 1 Jul 1990

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title = "Phase separation in Nd2-χCeχCuO4. Evidence for superconductivity at a single composition",

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.",

author = "P. Lightfoot and Richards, {D. R.} and B. Dabrowski and Hinks, {D. G.} and Shiyou Pei and Marx, {D. T.} and Mitchell, {A. W.} and Ying Zheng and Jorgensen, {J. D.}",

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doi = "10.1016/0921-4534(90)90087-U",

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TY - JOUR

T1 - Phase separation in Nd2-χCeχCuO4. Evidence for superconductivity at a single composition

AU - Lightfoot, P.

AU - Richards, D. R.

AU - Dabrowski, B.

AU - Hinks, D. G.

AU - Pei, Shiyou

AU - Marx, D. T.

AU - Mitchell, A. W.

AU - Zheng, Ying

AU - Jorgensen, J. D.

PY - 1990/7/1

Y1 - 1990/7/1

N2 - 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.

AB - 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.

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DO - 10.1016/0921-4534(90)90087-U

M3 - Article

AN - SCOPUS:0025462701

SN - 0921-4534

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JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - 5-6

ER -

Phase separation in Nd_2-χCe_χCuO₄. Evidence for superconductivity at a single composition

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