In this study, large single grain Y-Ba-Cu-O (YBCO) superconductors with CeO2 addition were fabricated by the infiltration and growth (IG) technique. It is noticeable that the CeO2 doped IG-YBCO sample showed a superior critical current density Jc(H, T) with a peak effect. The Jc (3T, 65K) of the IG-YBCO sample with CeO2 addition reached 105Acm- 2, which was two times higher than that of the CeO2 doped top-seeded melt texture (TSMT)-YBCO sample. Microstructure analysis indicated that the concentration of Sm in the CeO 2 doped IG-YBCO sample was 0.2mol%. The Sm which dissolved from the SmBCO seed diffused into the bulk to form compositional fluctuations of (Y, Sm)BCO and was correlated to the effective pinning in high field regions (or peak effect) to improve the Jc(H, T) in high fields. In addition, the maximum trapped field value of 0.23T and trapped field profile of the CeO 2 doped sample grown by IG are larger than that of 0.13T grown by TSMT using the same diameter of precursor pellets.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry