引用本文:
赵良仲, 朱道本, 张金彪, 王俊茹, 杨德亮, 陈德俊, 胡玉秀, 郭可珍, 侯可悦. YBa2Cu3O~7超导体中钡的价态[J]. 应用化学,
1989, 6(1): 89-90.
Citation: Zhao Liangzhong, Zhu Daoben, Zhang Jinbiao, Wang Junru, Yang Deliang, Cheng Dejun, Hu Yuxiu, Gao Kezhen, Hou Keyue. ON THE VALENCE OF BARIUM IN SUPERCONDUCTING YBa2Cu3O~7[J]. Chinese Journal of Applied Chemistry, 1989, 6(1): 89-90.
Citation: Zhao Liangzhong, Zhu Daoben, Zhang Jinbiao, Wang Junru, Yang Deliang, Cheng Dejun, Hu Yuxiu, Gao Kezhen, Hou Keyue. ON THE VALENCE OF BARIUM IN SUPERCONDUCTING YBa2Cu3O~7[J]. Chinese Journal of Applied Chemistry, 1989, 6(1): 89-90.
YBa2Cu3O~7超导体中钡的价态
摘要:
对于YBa2Cu3O~7超导体的Ba 3d X光电子能谱(XPS)存在分裂(出现肩峰)的现象有很多不同的解释。Kohiki等[1]认为主峰和肩峰分别代表晶格Ba2+离子和金属Ba;Han等[2]则认为它们分别代表Ba2+离子和更高价态的Ba离子;Ji等[2]提出超导体中存在Ba2+和Ba(2-δ)+两种离子;唐有祺等[4]报道超导体存在体相钡、表面BaCO3的钡和绝缘相中的钡,它们的Ba 3d5/2结合能分别为777.8,779.7和781.5eV;Fjellvag等[5]也观察到Ba3d谱中出现肩峰,但他们认为超导体中存在两种晶格钡或金属钡的一可能性极小,因而无法解释所观察到的现象。
English
ON THE VALENCE OF BARIUM IN SUPERCONDUCTING YBa2Cu3O~7
Abstract:
XPS studies show that the valence of Ba in superconducting YBa2Cu3O)~7 is +2.The shoulders on the Ba 3d spectrum of the air exposed superconductor did not originate fromthe chemical shift, but from the different charging effect.
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