Valence state of Cu in Nd2-xCexCuO4 system

Shinya Uji; Masahiko Shimoda; Haruyoshi Aoki

Valence state of Cu in Nd_2-xCe_xCuO₄ system

Shinya Uji, Masahiko Shimoda, Haruyoshi Aoki

Science

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

54 Citations (Scopus)

Abstract

We present XPS studies of semiconducting Nd_2-xCe_xCuO₄ (0≤x≤0.20) and superconducting Nd_1.85Ce_0.15CuO_4-y to clarify the location of the electron carriers. Examination of the Ce3d spectra shows that the Ce ions are donors of electron carriers. From the analysis of the Cu2p spectra, the Cu⁺ concentration is found to increase with the Ce concentration x. A definite increase in the Cu⁺ concentration due to the reduction procedure is found for the superconducting sample. The present results suggest that the conduction of the electron carriers takes place in the CuO₄ square plane in this system.

Original language	English
Pages (from-to)	804-806
Number of pages	3
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	28
Issue number	5
Publication status	Published - 1989 May

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "We present XPS studies of semiconducting Nd2-xCexCuO4 (0≤x≤0.20) and superconducting Nd1.85Ce0.15CuO4-y to clarify the location of the electron carriers. Examination of the Ce3d spectra shows that the Ce ions are donors of electron carriers. From the analysis of the Cu2p spectra, the Cu+ concentration is found to increase with the Ce concentration x. A definite increase in the Cu+ concentration due to the reduction procedure is found for the superconducting sample. The present results suggest that the conduction of the electron carriers takes place in the CuO4 square plane in this system.",

author = "Shinya Uji and Masahiko Shimoda and Haruyoshi Aoki",

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T1 - Valence state of Cu in Nd2-xCexCuO4 system

AU - Uji, Shinya

AU - Shimoda, Masahiko

AU - Aoki, Haruyoshi

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Y1 - 1989/5

N2 - We present XPS studies of semiconducting Nd2-xCexCuO4 (0≤x≤0.20) and superconducting Nd1.85Ce0.15CuO4-y to clarify the location of the electron carriers. Examination of the Ce3d spectra shows that the Ce ions are donors of electron carriers. From the analysis of the Cu2p spectra, the Cu+ concentration is found to increase with the Ce concentration x. A definite increase in the Cu+ concentration due to the reduction procedure is found for the superconducting sample. The present results suggest that the conduction of the electron carriers takes place in the CuO4 square plane in this system.

AB - We present XPS studies of semiconducting Nd2-xCexCuO4 (0≤x≤0.20) and superconducting Nd1.85Ce0.15CuO4-y to clarify the location of the electron carriers. Examination of the Ce3d spectra shows that the Ce ions are donors of electron carriers. From the analysis of the Cu2p spectra, the Cu+ concentration is found to increase with the Ce concentration x. A definite increase in the Cu+ concentration due to the reduction procedure is found for the superconducting sample. The present results suggest that the conduction of the electron carriers takes place in the CuO4 square plane in this system.

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Valence state of Cu in Nd_2-xCe_xCuO₄ system

Abstract

ASJC Scopus subject areas

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