期刊
SOLID STATE COMMUNICATIONS
卷 149, 期 47-48, 页码 2121-2124出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2009.10.001
关键词
Iron-based superconductor; Layered pnictides; Electronic transport
The epitaxial growth of Fe-based superconductors such as Co-doped SrFe2As2 (SrFe2As2:CO) was reported recently, but has still insufficient properties for a device application because they have rough surfaces and are decomposed by reactions with water vapor in an ambient atmosphere. This paper reports that epitaxial Films of Co-doped BaFe2As2 grown at 700 degrees C show the onset superconducting transition temperature of similar to 20 K. The transition is sharper than those observed on the SrFe2As2:Co films, which would originate from their improved crystallinity. These films also have atomically-flat surfaces with step-and-terrace structures and exhibit chemical stability against exposure to water vapor. (C) 2009 Elsevier Ltd. All rights reserved.
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