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Abstract:
The synergistic effects of double doping with a positive mismatch perovskite (Ba2YNbO6) and a negative mismatch perovskite (LaAlO3) on the brittle ceramic YBa2Cu3O7-x (YBCO) superconducting films were investigated. The double-doped sample allows a greater doping amount than any single doping, with significantly smaller nanostrain on the c axis, and shows superior superconducting properties. By analyzing the crystal mismatch and establishing a suitable model of the doping effects, it was found that the double doping with the positive mismatch and the negative mismatch dopant cancels the long-range strain but still generates defects around the interface between the YBCO and the dopants, simultaneously. This result reveals a feasible method for solving the problem of degradation and even cracks in the YBCO film due to the excess doping amount. This approach provides a wider compositional space for the design and fabrication of more ingenious pinning structures in the YBCO film for meeting the criteria of specific applications.
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Source :
CRYSTAL GROWTH & DESIGN
ISSN: 1528-7483
Year: 2020
Issue: 5
Volume: 20
Page: 3449-3455
3 . 8 0 0
JCR@2022
ESI Discipline: CHEMISTRY;
ESI HC Threshold:139
Cited Count:
WoS CC Cited Count: 13
SCOPUS Cited Count: 14
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 5
Affiliated Colleges: