XPS and XANES study on Pb2Sr2YCu3O8+δ and PbBaSr(YCa)Cu3O7+δ

Masayasu Nagoshi, Ayako Tokiwa-Yamamoto, Yasuhiko Syono, Yasuo Fukuda, Masashi Tachiki

研究成果: Article査読

2 被引用数 (Scopus)

抄録

The charge distribution in Pb2Sr2YCu3O8+δ and PbBaSrY1-xCaxCu3O7+δ has been studied by X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge structure (XANES). The Cu 2p core-level and the Pb M3 XANES show that the valences of Cu and Pb in the blocking layers are + 1 and + 2, respectively, for the oxides synthesized in a reducing atmosphere (δ = 0). The valences of Cu and Pb increase after oxidation by annealing in O2 gas. On the other hand, the substitution of Ca for Y (x = 0.2) hardly changes the valences of Cu and Pb. The core-levels of Ba, Sr and Y are not changed in the binding energy by the oxidation, but are shifted to the lower-binding-energy side by the substitution. These results will be discussed in terms of charge distributions in the crystal structures before and after the oxidation and substitution.

本文言語English
ページ(範囲)503-507
ページ数5
ジャーナルJournal of Electron Spectroscopy and Related Phenomena
88-91
出版ステータスPublished - 1998 3 1
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 放射線
  • 原子分子物理学および光学
  • 凝縮系物理学
  • 分光学
  • 物理化学および理論化学

フィンガープリント

「XPS and XANES study on Pb<sub>2</sub>Sr<sub>2</sub>YCu<sub>3</sub>O<sub>8+δ</sub> and PbBaSr(YCa)Cu<sub>3</sub>O<sub>7+δ</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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