Effects of thickness on superconducting properties and structures of Y_2O_3/BZO-doped MOD-YBCO films  

作　　者：丁发柱 古宏伟 王洪艳 张慧亮 张腾 屈飞 董泽斌 周微微 

机构地区：[1]Key Laboratory of Applied Superconductivity, Chinese Academy of Sciences [2]Institute of Electrical Engineering, Chinese Academy of Sciences

出　　处：《Chinese Physics B》2015年第5期541-545,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51272250);the National Basic Research Program of China(Grant No.2011CBA00105);the National High Technology Research and Development Program of China(Grant No.2014AA032702);the Beijing Natural Science Foundation,China(Grant No.2152035)

摘　　要：We report the thickness dependence of critical current density （Jc） in YBa2Cu3O7-x （YBCO） films with BaZrO3 （BZO） and Y2O3 additions grown on single crystal LaAlO3 substrates by metalorganic deposition using trifluoroacetates （TFA-MOD）. Comparing with pttre YBCO films, the Jc of BZO/Y2O3-doped YBCO films was significantly enhanced. It was also found that with the increase of the thickness of YBCO film from 0.25 μm to 1.5 μm, the Ic of BZO/Y2O3-doped YBCO film increased from 130 A/cm to 250 A/cm and yet Jc of YBCO film decreased from 6.5 MA/cm2 to 2.5 M A/cm2. The thick BZO/Y2O3-doped MOD-YBCO film showed lower Jc, which is mainly attributed to the formation of a-axis grains and pores.We report the thickness dependence of critical current density （Jc） in YBa2Cu3O7-x （YBCO） films with BaZrO3 （BZO） and Y2O3 additions grown on single crystal LaAlO3 substrates by metalorganic deposition using trifluoroacetates （TFA-MOD）. Comparing with pttre YBCO films, the Jc of BZO/Y2O3-doped YBCO films was significantly enhanced. It was also found that with the increase of the thickness of YBCO film from 0.25 μm to 1.5 μm, the Ic of BZO/Y2O3-doped YBCO film increased from 130 A/cm to 250 A/cm and yet Jc of YBCO film decreased from 6.5 MA/cm2 to 2.5 M A/cm2. The thick BZO/Y2O3-doped MOD-YBCO film showed lower Jc, which is mainly attributed to the formation of a-axis grains and pores.

关 键 词：YBa2Cu3O7-x films thickness BZO/Y2O3 doping TEXTURE 

分 类 号：O484[理学—固体物理]