%0 Journal Article
%T X-RAY PHOTOELECTRON SPECTROSCOPY OF HIGH T_c SUPERCONDUCTOR YBa_2 Cu_3 O_(7-x)
%A Present address:Hengyang Institute of Technology TIAN LU WANG Wenhao GONG Yandong SUN Yuzhen LIN Shuzi Institute of Metal Research
%A Academia Sinica
%A Shenyang
%A China
%A <br>Present address:Hengyang Institute of Technology. TIAN LU WANG Wenhao GONG Yandong SUN Yuzhen LIN Shuzi Institute of Metal Research
%A Academia Sinica
%A Shenyang
%A China
%J 金属学报(英文版)
%D 1992
%I 
%X The XPS spectra of superconducting(123-orthorhombic structure)and non-superconducting(123-tetragonal structure)YBa_2Cu_3O_(7-x)ceramics were obtained at room temperature and130 K with RIBER LAS 3000 surface analysis system,in which a sample cooling stage and asurface cleaning scraper,both made by the authors,were installed.No evidence of Cu~(3+)wasfound.The O 1s shows double lines.They are attributed to O1 and O4 with higher binding en-ergy and to O2 and O3 with lower binding energy respectively,and it was confirmed by cal-culation of SW-X_α method.The differences and changes in valence states of Y,Ba,Cu andO in both samples were discussed.
%K YBaCuO
%K superconductor
%K low temperature
%K XPS<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=597F8B64C3658D943E862F39F60BE7D3&yid=F53A2717BDB04D52&vid=94C357A881DFC066&iid=5D311CA918CA9A03&sid=76B5E24D6EC46B4B&eid=205BE674D84A456D&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=12