VALENCE STATES OF COPPER IN ND2-XCEXCUO4-DELTA STUDIED BY X-RAY AND ULTRAVIOLET PHOTOELECTRON-SPECTROSCOPY

被引：5

作者：

BUCHKREMERHERMANNS, H

ADLER, P

SIMON, A

机构：

[1] Max-Planck-Institut für Festkörperforschung, D-7000 Stuttgart 80

来源：

JOURNAL OF THE LESS-COMMON METALS | 1990年 / 164卷

关键词：

D O I：

10.1016/0022-5088(90)90481-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have studied core level and valence band spectra of unreduced Nd2-xCexCuO4 (x = 0, 0.15) and reduced Nd2-xCexCuO4-δ(x = 0, 0.15) in order to explore the electronic changes associated with doping and reduction. We determine the valency of copper and the lanthanoides in the various compounds. A quantitative estimation of the CuI fraction from the Cu 2p 3 2 core level spectra yields 15% CuI for Nd1.85Ce0.15CuO4 and 26% CuI for Nd1.85Ce0.15CuO4-δ. The valence band spectra did not reveal features attributable to monovalent copper. © 1990.

引用

页码：760 / 767

页数：8

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