Abstract
Pulsed laser deposited thin Y Ba2Cu3O7−x (YBCO) films with pinning additions of 5 at. % Ba2Y TaO6 (BYTO) were compared to films with 2.5 at. % Ba2Y TaO6 + 2.5 at. % Ba2Y NbO6 (BYNTO) additions. Excellent magnetic flux-pinning at 77 K was obtained with remarkably high irreversibility fields greater than 10 T (YBCO-BYTO) and 11 T (YBCO-BYNTO), representing the highest ever achieved values in YBCO films.
Highlights
Enhanced 77 K vortex-pinning in Y Ba2Cu3O7−x films with Ba2Y TaO6 and mixed Ba2Y TaO6 + Ba2Y NbO6 nano-columnar inclusions with irreversibility field to 11 T
The growth of self-assembled columnar nanostructures embedded into epitaxial thin films, allowing the tuning of the material functionalities, has opened unprecedented prospects for potential applications in ferroelectrics, thermoelectrics, and magnetoelectrics devices and high temperature superconductors.[1,2,3,4,5]
The possibility to strongly improve flux pinning in YBa2Cu3O7−x films by introducing nano-scale artificial pinning centres (APCs) has attracted a remarkable interest in recent years
Summary
Enhanced 77 K vortex-pinning in Y Ba2Cu3O7−x films with Ba2Y TaO6 and mixed Ba2Y TaO6 + Ba2Y NbO6 nano-columnar inclusions with irreversibility field to 11 T. The melting point of Nb2O5 (1512 ◦C) is lower than the corresponding one of Ta2O5 (1872 ◦C), leading to a greater mobility of Nb5+ ions with respect to Ta5+ ions at the typical YBCO deposition temperatures.[25] the availability of faster diffusing Nb5+ ions in the BYNTO structures allows self-organised growth to be achieved, locally relaxing the strain field without a strong need of generating intergrowths.
Sign-in/Register to view highlights & summary 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.
