Metal atom stoichiometry in the electron doped superconductor (Nd,Ce)2CuO4

R. J. Cava; H. Takagi; R. M. Fleming; J. J. Krajewski; W. F. Peck; P. Bordet; M. Marezio; B. Batlogg; L. W. Rupp

doi:10.1016/0921-4534(92)90541-J

Metal atom stoichiometry in the electron doped superconductor (Nd,Ce)₂CuO₄

R. J. Cava, H. Takagi, R. M. Fleming, J. J. Krajewski, W. F. Peck, P. Bordet, M. Marezio, B. Batlogg, L. W. Rupp

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

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 Nd_2-xCe_xCuO_4-δ when synthesised under optimal conditions, and (2) to a very high resolution, the Nd_2-xCe_xCuO_4-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 Nd_1.85Ce_0.15CuO_4-δ not present for other compositions in the solid solution.

Original language	English (US)
Pages (from-to)	65-72
Number of pages	8
Journal	Physica C: Superconductivity and its applications
Volume	199
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(92)90541-J
State	Published - Aug 15 1992
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(92)90541-J

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title = "Metal atom stoichiometry in the electron doped superconductor (Nd,Ce)2CuO4",

abstract = "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.",

author = "Cava, {R. J.} and H. Takagi and Fleming, {R. M.} and Krajewski, {J. J.} and Peck, {W. F.} and P. Bordet and M. Marezio and B. Batlogg and Rupp, {L. W.}",

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T1 - Metal atom stoichiometry in the electron doped superconductor (Nd,Ce)2CuO4

AU - Cava, R. J.

AU - Takagi, H.

AU - Fleming, R. M.

AU - Krajewski, J. J.

AU - Peck, W. F.

AU - Bordet, P.

AU - Marezio, M.

AU - Batlogg, B.

AU - Rupp, L. W.

PY - 1992/8/15

Y1 - 1992/8/15

N2 - 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.

AB - 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.

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Metal atom stoichiometry in the electron doped superconductor (Nd,Ce)₂CuO₄

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