Microstructure and superconducting properties of (BaTiO3,Y2O3)-doped YBCO films under different firing temperatures  

作　　者：Hong-Yan Wang Fa-Zhu Ding Hong-Wei Gu Hui-Liang Zhang Ze-Bin Dong 

机构地区：[1]University of Chinese Academy of Sciences, Beijing 100049,China [2]Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences,Beijing 100190, China

出　　处：《Rare Metals》2017年第1期37-41,共5页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 51002149 and 51272250);the National Basic Research Program of China (No. 2011CBA00105);the National High Technology Research and Development Program of China (No. 2014AA032702);the Beijing Natural Science Foundation, China (No. 2152035)

摘　　要：YBaCuO(YBCO) films with co-doping of Ba Ti O(BTO) and YOnanostructures were successfully fabricated on La Al O(LAO) substrate by metal organic deposition using trifluoroacetates(TFA-MOD). The focus of this study was to optimize the process conditions during the firing heat treatment of high critical current density(J C)-co-doped YBCO films. The effect of the firing temperatures on both the surface morphology and the superconducting properties for the doped YBCO films was systematically studied. According to the X-ray diffraction(XRD) and scanning electron microscopy(SEM) results,the films prepared at 820 and 850 °C show poor electrical performance due to impurity phases and large pores. In contrast, the dense YBCO films prepared at 830 and840 °C with the critical current densities of 10 MA-cm(77 K, 0 T) are obtained.YBa_2Cu_3O_(7-x)(YBCO) films with co-doping of Ba Ti O_3(BTO) and Y_2O_3 nanostructures were successfully fabricated on La Al O_3(LAO) substrate by metal organic deposition using trifluoroacetates(TFA-MOD). The focus of this study was to optimize the process conditions during the firing heat treatment of high critical current density(J C)-co-doped YBCO films. The effect of the firing temperatures on both the surface morphology and the superconducting properties for the doped YBCO films was systematically studied. According to the X-ray diffraction(XRD) and scanning electron microscopy(SEM) results,the films prepared at 820 and 850 °C show poor electrical performance due to impurity phases and large pores. In contrast, the dense YBCO films prepared at 830 and840 °C with the critical current densities of 10 MA-cm^(-2)(77 K, 0 T) are obtained.

关 键 词：YBA2CU3O7-X BaTiO3 and Y2O3 nanostructures Firing temperature TFA-MOD 

分 类 号：TB383.2[一般工业技术—材料科学与工程]