Enhanced superconducting performance in solution-derived YBCO–BaZrO3 composite film

Progress in Natural Science: Materials International

Zhao Zhang¹  Chengshan Li²  Lihua Jin³  Xiuting Wang³  Limin Li⁴  Pingxiang Zhang⁵  Li Lei⁵  Gaoyang Zhao⁶  Zongfan Duan⁶  Jiqiang Jia⁶  Fuxue Yan⁶ 

[1] Corresponding author. Advanced Material Analysis and Test Center, Xi'an University of Technology, Xi'an, Shaanxi, 710048, China.;Corresponding author. School of Material Science and Engineering, Xi'an University of Technology, Xi'an, Shaanxi, 710048, China.;Key Laboratory of Electrical Materials and Infiltration Technology of Shaanxi Province, Xi'an, Shaanxi, 710048, China;School of Material Science and Engineering, Xi'an University of Technology, Xi'an, Shaanxi, 710048, China;Advanced Material Analysis and Test Center, Xi'an University of Technology, Xi'an, Shaanxi, 710048, China;School of Material Science and Engineering, Xi'an University of Technology, Xi'an, Shaanxi, 710048, China;

关键词: Epitaxial growth;    Sol-gel preparation;    Superconductors;    Flux pinning;    YBCO;   

DOI  :  

来源: DOAJ

【 摘 要 】

YBa2Cu3O7-δ/BaZrO3 (YBCO/BZO) composite film with enhanced flux-pinning performance was prepared on LaAlO3 (LAO) substrate via a fluorine-free sol-gel method in combination with a novel photosensitive sol-gel lithography technique. Owing to the difference of lattice mismatch between the interfaces of YBCO/LAO and YBCO/BZO, high-density stacking faults were successfully introduced into YBCO matrix, which has been confirmed by XRD and HRTEM analysis. Magnetization measurement results indicate that YBCO/BZO composite film has a stronger current-carrying capacity than the pure YBCO film especially under applied magnetic fields. However, the critical current density of YBCO/CeO2 composite film is much lower than that of the pure YBCO film at all the applied magnetic fields due to the chemical reaction between YBCO and CeO2. Therefore, it can be concluded that the flux-pinning performance of YBCO film can be improved by the lattice distortions within YBCO matrix as long as the metal oxide microarrays cannot react with YBCO films.

【 授权许可】

Unknown