A novel seed/buffer-layer construction for enlarging c-directional growth sector in high performance YBa2Cu3O7-delta bulk

作者：Qian, Jun; Ma, Ling Tian; Du, Ge Hai; Xiang, Hui; Liu, Yan; Wan, Yan; Huang, Si Min; Yao, Xin^*; Xiong, Jie; Tao, Bo Wang

来源：Scripta Materialia, 2018, 150: 31-35.

DOI：10.1016/j.scriptamat.2018.02.036

• YBa2Cu3O7-delta superconductor bulk
• Buffer-layer
• Film-seed
• Non-equilibrium face
• c growth sector

The size enlargement of the c-growth-sector (c-GS) is a matter of great importance in fabricating high-performance YBa2Cu3O7-delta (Y123) bulks. Here, we report a novel construction of film-seed/buffer-layer/mainpellet, in which the 45 degrees-aligned film-seed associated with a would-be [110]-sided buffer-layer was applied. The [110]-sided seed rapidly induced the crystallization of the buffer-layer with the (110) face, which prompted the second rapid growth on the main-pellet. Consequently, an Y123 bulk with sizable c-GS and high levitation force was achieved. The new seeding construction with the rapid growth nature of non-equilibrium face is encouraging for preparing other superconductor bulks in the Y123 family.

• 出版日期2018-6
• 单位上海交通大学; 电子薄膜与集成器件国家重点实验室; 电子科技大学