Effect of Firing Temperature on Microstructure and Superconductivity of YBCO Films Derived from Low-fluorine Solution

摘要：

　　Using a low-fluorine solution,YBa2Cu3O7-x (YBCO) superconducting films were prepared on LaAlO3 (LAO) substrates by dip-coating method.YBCO films were fired at different temperatures with same oxygen pressure of 1.3 vol% and water vapor pressure of 7.4 vol%.Effect of firing temperature on film microstructure and superconductivity was investigated.The results indicated that YBCO films with high-degree c-axis orientation (the degree of c-axis orientation reached 96%) can be obtained when heat treated at 800 ℃.At this temperature YBCO films were grown on LAO with cubic-on-cubic mode,resulting in a high critical transition temperature (Tc) of 91.5 K,and critical current density (Jc) of lager than 1 MA/cm2.However,when fired at lower temperatures,YBCO films trended to form a-axis grains,which degraded Jc of films.And a higher heat treatment temperature also depressed superconductivity of YBCO films.

关键词： YBa2Cu3O7-x Superconductor Orientation Critical current density

作者: Chuanbao Wu Gaoyang Zhao Yuanqing Chen

作者单位: Department of Materials Physics and Chemistry, Xi’an University of Technology, Xi’an, Shanxi,710048, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 243-248

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）