A rapid process of YBa2Cu3O7−δ thin film fabrication using trifluoroacetate metal–organic deposition with polyethylene glycol additive
A rapid process of YBa2Cu3O7−δ thin film fabrication using trifluoroacetate metal–organic deposition with polyethylene glycol additive
复制标题
DOI：
10.1088/0953-2048/26/5/055013
复制
发表时间：
2013-04
影响因子：
3.6
通讯作者：
Wei Wu;F. Feng;K. Shi;Wei Zhai;T. Qu;Rongxia Huang;Xiao Tang;Xiaohao Wang;Qin Hu;J. Griv
中科院分区：
文献类型：
--
作者：
Wei Wu;F. Feng;K. Shi;Wei Zhai;T. Qu;Rongxia Huang;Xiao Tang;Xiaohao Wang;Qin Hu;J. Griv
三氟乙酸金属有机沉积（TFA-MOD）是一种很有前景的制备 YBa2Cu3O7−δ（YBCO）超导薄膜的技术。但其热解过程缓慢，通常需要10小时以上，给工业化生产带来了障碍。在这项研究中，利用聚乙二醇（PEG）来减少发生强烈热解反应时涂层薄膜内部产生的应力。在前驱体溶液中添加30 wt% PEG2000，通过15分钟的快速热解过程可以获得光滑的薄膜表面。在对结晶和氧化过程、PEG添加剂的质量百分比和分子量进行优化后，可以使用（20-30）wt% PEG（1000-2000）添加剂常规地制备Jc约为4.5 MA cm−2（77 K，自场）的YBCO薄膜，总处理时间约为2小时，包括15分钟的热解过程时间。使用屈曲形成机制之一讨论了 PEG 添加剂的影响。 PEG 添加剂降低压缩应力被认为是防止屈曲的原因。
Trifluoroacetate metal–organic deposition (TFA-MOD) is a promising technique to fabricate YBa2Cu3O7−δ (YBCO) superconducting films. However, its slow pyrolysis process, which usually takes more than 10 h, constitutes a barrier for industrial production. In this study, polyethylene glycol (PEG) was utilized to reduce the stress generation inside the coated films when the strong pyrolysis reactions happen. With the addition of 30 wt% PEG2000 to the precursor solution, a smooth film surface could be obtained through a rapid pyrolysis process of 15 min. After the optimizations of the crystallization and oxygenation processes, mass percentage and molecular weight of PEG additive, YBCO thin films with Jc of about 4.5 MA cm−2 (77 K, self-field) could be routinely fabricated using (20–30) wt% PEG(1000–2000) additive with a total treatment time of about 2 h including the 15 min pyrolysis process time. The effects of PEG additive were discussed using one of the mechanisms of buckling formation. The reduction of compressive stress by PEG additive was suggested to be the reason for preventing buckling.