| Precursor evolution and growth mechanism of BTO/YBCO films by TFA–MOD process |
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| 引用本文： | 王洪艳,丁发柱,古宏伟,张腾,彭星煜.Precursor evolution and growth mechanism of BTO/YBCO films by TFA–MOD process[J].中国物理 B,2014(10):507-511. |
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| 作者姓名： | 王洪艳 丁发柱 古宏伟 张腾 彭星煜 |
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| 作者单位： | Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences;University of Chinese Academy of Sciences |
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| 基金项目： | Project supported by the National Natural Science Foundation of China(Grant Nos.51002149 and 51272250);the National Basic Research Program of China(Grant No.2011CBA00105) |
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| 摘 要： | In this study, BaTiO3 （BTO）-doped YBCO films are prepared on LaA103 （100） single-crystal substrates by metal- organic decomposition （MOD） using trifluoroacetate （TFA） precursor solutions. The critical current density （Jc） of BTO/YBCO film is as high as 10 MA/cm2 （77 K, 0 T）. The BTO peak is found in the X-ray diffraction （XRD） pattern of a final YBCO superconductivity film. Moreover, a comprehensive study of the precursor evolution is conducted mainly by X-ray analysis and μ-Raman spectroscopy. It is found that the TFA begins to decompose at the beginning of the thermal process, and then further decomposes as temperature increases, and at 700 ℃ BTO nanoparticles begin to appear. It sug- gests that the YBCO film embedded with BTO nanoparticles, whose critical current density （Jc） is enhanced, is successfully prepared by an easily scalable chemical solution deposition technique.
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| 关 键 词： | TFA-MOD YBCO薄膜 BTO 前体 临界电流密度 进化 机制 溶液制备 |
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