Abstract
The nontoxic cuprate superconductor (Cu,C)Ba2Ca3Cu4Oy [(Cu,C)-1234] with critical temperature of about 117 K is supposed to have great potential for applications in the liquid nitrogen temperature region. Using pulsed laser deposition technique, we successfully obtain superconducting (Cu,C)-1234 films on LaAlO3 (001) substrates with different critical temperatures by tuning the flow rate of CO2 gas during the deposition. The existence of CO32− carbonate clusters in our (Cu,C)-1234 films is directly confirmed by the mid-infrared transmittance spectra measured on these films. Our results also reveal that the content of the CO32− carbonate clusters increases with the flow rate of CO2. The zero-resistance critical temperature (Tc0) of the films exhibits dome-like behaviour as the content of CO32− carbonate clusters increases. Our observations not only provide clear evidence for the existence of CO32− carbonate clusters in the films, but also testify that the content of CO32− carbonate clusters has considerable influence on the superconducting properties of the films.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
