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

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Microstructure and superconducting properties of (BaTiOb class="a-plus-plus">3b>, Yb class="a-plus-plus">2b>Ob class="a-plus-plus">3b>)-doped YBCO films under different firing temperatures

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作者：Hong-Yan Wang ; Fa-Zhu Ding ; Hong-Wei Gu ; Hui-Liang Zhang ; Ze-Bin Dong
关键词：YBa2Cu3O7−x ; BaTiO3 and Y2O3 nanostructures ; Firing temperature ; TFA ; MOD
刊名：Rare Metals
出版年：2017
出版时间：January 2017
年：2017
卷：36
期：1
页码：37-41
全文大小：
刊物类别：Chemistry and Materials Science
刊物主题：Metallic Materials; Nanotechnology; Ceramics, Glass, Composites, Natural Materials; Surfaces and Interfaces, Thin Films; Inorganic Chemistry; Physical Chemistry;
出版者：Nonferrous Metals Society of China
ISSN：1867-7185
卷排序：36

文摘

YBab>2b>Cub>3b>Ob>7−xb> (YBCO) films with co-doping of BaTiOb>3b> (BTO) and Yb>2b>Ob>3b> nanostructures were successfully fabricated on LaAlOb>3b> (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 (Jb>Cb>)-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.