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

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Abstract

YBa2Cu3O7−x (YBCO) films with co-doping of BaTiO3 (BTO) and Y2O3 nanostructures were successfully fabricated on LaAlO3 (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 and 840 °C with the critical current densities of 10 MA·cm−2 (77 K, 0 T) are obtained.

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Acknowledgments

This work was 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) and the Beijing Natural Science Foundation, China (No. 2152035).

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Authors and Affiliations

  1. University of Chinese Academy of Sciences, Beijing, 100049, China

    Hong-Yan Wang

  2. Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, 100190, China

    Hong-Yan Wang, Fa-Zhu Ding, Hong-Wei Gu, Hui-Liang Zhang &  Ze-Bin Dong

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  1. Hong-Yan Wang
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  2. Fa-Zhu Ding
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Correspondence to Fa-Zhu Ding.

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Wang, HY., Ding, FZ., Gu, HW. et al. Microstructure and superconducting properties of (BaTiO3, Y2O3)-doped YBCO films under different firing temperatures. Rare Met. 36, 37–41 (2017). https://doi.org/10.1007/s12598-015-0606-2

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  • DOI: https://doi.org/10.1007/s12598-015-0606-2

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