Superconductivity in epitaxial films of the oxycarbonate Sr{sub 2}CuO{sub 2}(CO{sub 3}) converted from ``infinite layer`` SrCuO{sub 2} by thermal processing
- Solid State Division, Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, Tennessee 37831-6057 (United States)
- Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, 567 Osaka (Japan)
The conversion of semiconductive SrCuO{sub 2} ``infinite layer`` epitaxial films into a metallic and superconducting ({ital T}{sub {ital c}}{congruent}30 K) oxycarbonate phase related to Sr{sub 2}CuO{sub 2}(CO{sub 3}) has been induced by thermal processing in oxidizing ambient containing a small amount of CO{sub 2}. Ion beam analysis using the resonant {sup 12}C({ital p},{ital p}){sup 12}C elastic backscattering cross section for protons incident at 1.73 MeV confirms the presence of substitutional C in the converted perovskite lattice. Comparison of the threshold CO{sub 2} partial pressure with thermodynamic stability data for SrCO{sub 3} suggests that the conversion is initiated by the high affinity of Sr(O) for CO{sub 2}. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 95465
- Journal Information:
- Applied Physics Letters, Vol. 67, Issue 9; Other Information: PBD: 28 Aug 1995
- Country of Publication:
- United States
- Language:
- English
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