Abstract
The doping effect of Mn in polycrystalline YBa2Cu3O7 − δ material (YBCO) is carefully analyzed considering the transport properties of composites formed by small inclusion particles of Mn embedded whether in a YBCO matrix or in superconducting Fe-YBCO composites. In both cases, the improvement of their respective electrical resistivity was evidenced. The use of double element doping clearly shows that an a priori degradation of the YBCO electrical properties by Fe atoms can be greatly restored by appropriate Mn doping. This character can be very useful for technological applications. This improvement is mainly due to the reduction of the secondary and/or insulating phases formed at the grain boundaries, limiting the current transport. The involved mechanism is the probable existence of free charged Mn-based species which are responsible for an optimal oxygenation in the material contributing to the electrical response improvement. These species can be located in the composite, whether entering the CuO chains of the YBCO lattice or complexing and reducing the secondary phases formed during the sintering process, especially Fe2O3 and Y2BaCuO5 in the case of Fe-YBCO composites.
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.
