Development of Low-Fluorine Solution for YBCO Film Growth

作者：Jin, Lihua^*; Li, Chengshan^*; Feng, Jianqing; Yu, Zeming; Wang, Yao; Lei, Li; Zhao, Gaoyang; Sulpice, Aandre; Zhang, Pingxiang

来源：IEEE Transactions on Applied Superconductivity, 2016, 26(3): 7500504.

DOI：10.1109/TASC.2016.2547026

• High-temperature superconductor
• low-fluorine precursor
• metal-organic deposition
• YBCO film

We developed a simple and stable precursor solution containing low fluorine content to fabricate YBa2Cu3Oy (YBCO) films on CeO2/YSZ/CeO2 buffered NiW substrates. The fluorine content in the precursor solution could be controlled at 23.1% by tuning the ratio of barium trifluoroacetate to barium acetate. Fast pyrolysis process and smooth surface of YBCO precursor films could be acquired by using the low-fluorine solution. The phase, texture, microstructure, and superconducting properties of YBCO film were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscope, and four-probe method, respectively. The crystallized YBCO film showed good out-of-plane and in-plane textures. A high critical current density J(c) of similar to 3 MA/cm(2) (77 K, 0 T) could be obtained in the YBCO/CeO2/YSZ/CeO2/NiW sample derived from the low-fluorine solution. The results indicate that the controllable fluorine content solution could be useful for epitaxial growth of YBCO films on buffered NiW substrates.

• 出版日期2016-4
• 单位西北有色金属研究院; 西安理工大学