Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1594596 | Solid State Communications | 2009 | 4 Pages |
Abstract
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 ∘C show the onset superconducting transition temperature of ∼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.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Takayoshi Katase, Hidenori Hiramatsu, Hiroshi Yanagi, Toshio Kamiya, Masahiro Hirano, Hideo Hosono,