Polymer assisted thick single-layer YBa_2Cu_3O_(7-δ)films prepared with modified TFA-MOD method  

作　　者：Pei Guo Xiao-Hui Zhao Jie Xiong Xing-Zhao Liu Bo-Wan Tao 

机构地区：[1]School of Microelectronics and Solid-State Electronics,University of Electronic Science and Technology of China [2]State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China

出　　处：《Rare Metals》2014年第5期594-597,共4页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.51002024);the Sichuan Youth Science and Technology Innovation Research Team (No.2011JTD0006);the Program for Cooperation of Industry, Education and Academy of Guangdong Province, China (No. 2012B091100298);the Fundamental Research Funds for the Central Universities (Nos.ZYGX2012J039, ZYGX2011Z002, and ZYGX2012J035)

摘　　要：Single-layer YBa2Cu3O7-δ（YBCO） films with the thickness of over 600 nm were fabricated by modified metal organic deposition using trifluoroacetate metal organic deposition（TFA-MOD） method on LaAlO3（LAO） substrates. Polyvinylbutyral（PVB） was added into the precursor solution to enhance the thickness of the single layer. The pyrolysis process was shortened to about 3 h due to the reduction of the fluorine content in the precursor solution.The effects of heating rate during the crystallization process on the microstructure and Jcvalues of YBCO films were investigated. The α-axis-oriented YBCO crystals dominate when the heating rate is lower than 20 °C·min^-1, while faster heating rate of 43 °C·min^-1 results in pure c-axis epitaxial growth. The Jcvalues of YBCO films increase linearly with heating rate increasing due to the increase of c-axis YBCO growth, and the critical current（Ic） value of 100 A·cm^-1 within a single-layer YBCO film is achieved.Single-layer YBa2Cu3O7-δ（YBCO） films with the thickness of over 600 nm were fabricated by modified metal organic deposition using trifluoroacetate metal organic deposition（TFA-MOD） method on LaAlO3（LAO） substrates. Polyvinylbutyral（PVB） was added into the precursor solution to enhance the thickness of the single layer. The pyrolysis process was shortened to about 3 h due to the reduction of the fluorine content in the precursor solution.The effects of heating rate during the crystallization process on the microstructure and Jcvalues of YBCO films were investigated. The α-axis-oriented YBCO crystals dominate when the heating rate is lower than 20 °C·min^-1, while faster heating rate of 43 °C·min^-1 results in pure c-axis epitaxial growth. The Jcvalues of YBCO films increase linearly with heating rate increasing due to the increase of c-axis YBCO growth, and the critical current（Ic） value of 100 A·cm^-1 within a single-layer YBCO film is achieved.

关 键 词：Trifluoroacetate metal-organic deposition YBA2CU3O7-Δ Polyvinylbutyral Heating rate 

分 类 号：TB383.2[一般工业技术—材料科学与工程]