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

YBa 2 Cu 3 O 7− x (YBCO) films with co-doping of BaTiO 3 (BTO) and Y 2 O 3 nanostructures were successfully fabricated on LaAlO 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 treat...

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Bibliographic Details
Published in:Rare metals 2017, Vol.36 (1), p.37-41
Main Authors: Wang, Hong-Yan, Ding, Fa-Zhu, Gu, Hong-Wei, Zhang, Hui-Liang, Dong, Ze-Bin
Format: Article
Language:English
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Summary:YBa 2 Cu 3 O 7− x (YBCO) films with co-doping of BaTiO 3 (BTO) and Y 2 O 3 nanostructures were successfully fabricated on LaAlO 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 and 840 °C with the critical current densities of 10 MA·cm −2 (77 K, 0 T) are obtained.
ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-015-0606-2