XPS Study on the Formation Process of the High-T c Phase in the Bi-Pb-Sr-Ca-Cu-O System

X-ray photoemission spectroscopy (XPS) measurements were carried out to investigate the changes in the Cu ion valency through the formation of the high- T c phase in the Bi-Pb-Sr-Ca-Cu-O superconducting system. The Cu 2+ composition increased rapidly in the initial stages of sintering and became sat...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1989-08, Vol.28 (8A), p.L1365
Main Authors: Shin, Jae Soo, Enomoto, Hiroyuki, Takauchi, Hideki, Takano, Yoshiki, Mori, Natsuki, Ozaki, Hajime
Format: Article
Language:English
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Summary:X-ray photoemission spectroscopy (XPS) measurements were carried out to investigate the changes in the Cu ion valency through the formation of the high- T c phase in the Bi-Pb-Sr-Ca-Cu-O superconducting system. The Cu 2+ composition increased rapidly in the initial stages of sintering and became saturated, whereas the Cu + and Cu 3+ compositions showed a systematic change, within a certain sintering time, dependent on the sintering temperature. It was found that these changes in the Cu ion valency reflect the structural change in the formation of the high- T c phase in this system.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.28.L1365