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X-ray Photoelectron Spectroscopy on Superconducting T12CaBa2Cu2O8 Thin Film |
ZENG Wensheng;QIU ping1;YAN Shaolin2;LI Zengfa;ZHANG Guangyin |
Department of Physics, Nankai University, Tianjin 300071
1Department of Chemistry, Nankai University, Tianjin 300071
2Department of Electric Science, Nankai University, Tianjin 300071
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Cite this article: |
ZENG Wensheng, QIU ping, YAN Shaolin et al 1991 Chin. Phys. Lett. 8 314-317 |
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Abstract We have prepared single-phase superconducting T12CaBa2Cu2O8 thin film by dc magnetron sputtering process and measured X-ray photoelectron spectra of the film at room and liquid nitrogen temperatures. From the relative intensities of the Ba3d, Tl4f. O1 s and Cu2p spectra taken at different take-off angles, we have concluded that there is an adventitious contamination (nonsupercon-ducting phase) surface layer. After excluding contributions from these spurious phases, we have tentatively assigned which core-level shifts should be caused by the superconducting phase transition.
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Keywords:
74.75.+t
79.60.Eq
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Published: 01 June 1991
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