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
X-ray Photoelectron Spectroscopy on Superconducting T12CaBa2Cu2O8 Thin Film
Department of Physics, Nankai University, Tianjin 300071
1Department of Chemistry, Nankai University, Tianjin 300071
2Department of Electric Science, Nankai University, Tianjin 300071
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.
1991, Vol. 8 
