CHEMICAL STUDIES OF (001)-ORIENTED ER1BA2CU3O7-DELTA, ER5BA7CU12OY, AND ER4BA5CU9OY HIGH-TEMPERATURE SUPERCONDUCTOR THIN-FILMS BY PHOTOEMISSION SPECTROSCOPY

作     者：CHOUDHARY, KM BAE, J SESHADRI, P 

作者机构：University of Notre Dame Department of Electrical Engineering Materials Science and Engineering Program Notre Dame Indiana 46556 USA 

出 版 物：《JOURNAL OF SOLID STATE CHEMISTRY》 (固体化学杂志)

年 卷 期：1992年第100卷第2期

页      面：388-392页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

摘      要：Clean surfaces of (001)-oriented Er1Ba2Cu3O7?δ, Er5Ba7Cu12Oy, and Er4Ba5Cu9Oy high-temperature superconductor thin films were studied by photoemission spectroscopy using high-energy ultraviolet photons (hν in the 50 to 200 eV range). The surfaces were cleaned by heating in an ultrahigh-vacuum electron spectrometer at 400°C (or 350°C) in 1 × 10?3 Torr oxygen. Valence bands and outer core levels were studied. Ba 4d and Ba 5p doublet photopeaks showed spin-orbit splitting of 2.6 and 2.2 eV, respectively, as expected. Er, Ba, Cu, and O features in the valence band were identified.