X-Ray Photoelectron Spectroscopy Studies of 7 K-Phase Bi-System Single Crystals

X-Ray Photoelectron Spectroscopy Studies of 7 K-Phase Bi-System Single Crystals

The Bi-system single crystals with c -axis unit cell length of ∼24 Å, i.e., Bi-Sr-Cu-O (BSCO), Bi-Pb-Sr-Cu-O (BPSCO), Bi-Sr-Ca-Cu-O (BSCCO), and Bi-Pb-Sr-Ca-Cu-O (BPSCCO) single crystals, were prepared using the starting materials of various compositions by the self-flux method. X-ray photoelectron...

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Veröffentlicht in:Japanese Journal of Applied Physics 1991-05, Vol.30 (5R), p.926
Hauptverfasser: Kishida, Satoru, Tokutaka, Heizo, Futo, Wataru, Fujimoto, Hiroshi, Katsumi Nishimori, Katsumi Nishimori, Naganori Ishihara, Naganori Ishihara
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container_end_page
container_issue 5R
container_start_page 926
container_title Japanese Journal of Applied Physics
container_volume 30
creator Kishida, Satoru
Tokutaka, Heizo
Futo, Wataru
Fujimoto, Hiroshi
Katsumi Nishimori, Katsumi Nishimori
Naganori Ishihara, Naganori Ishihara
description The Bi-system single crystals with c -axis unit cell length of ∼24 Å, i.e., Bi-Sr-Cu-O (BSCO), Bi-Pb-Sr-Cu-O (BPSCO), Bi-Sr-Ca-Cu-O (BSCCO), and Bi-Pb-Sr-Ca-Cu-O (BPSCCO) single crystals, were prepared using the starting materials of various compositions by the self-flux method. X-ray photoelectron spectroscopy (XPS) measurements from the air-cleaved surfaces of the single crystals were carried out. From the results of the surface composition analyses, we found that Pb occupied a part of the Bi site in the BPSCO single crystal and Ca occupied a part of the Sr site in the BSCCO single crystal. The chemical bond natures of Sr, Cu and O in the BSCO crystal seem to be changed by doping with Pb and/or Ca.
doi_str_mv 10.1143/JJAP.30.926
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title X-Ray Photoelectron Spectroscopy Studies of 7 K-Phase Bi-System Single Crystals
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