刊名:Journal of Superconductivity Incorporating Novel Magnetism
出版年:2015
出版时间:June 2015
年:2015
卷:28
期:6
页码:1725-1728
全文大小:988 KB
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作者单位:Jiawei Li (1) Wanmin Yang (1) Miao Wang (1) Yuxia Guo (1) Zhongling Feng (1)
1. School of Physics and Information Technology, Shaanxi Normal University, Xi’an, Shaanxi, 710062, China
刊物类别:Physics and Astronomy
刊物主题:Physics Superconductivity, Superfluidity and Quantum Fluids Magnetism and Magnetic Materials Condensed Matter Characterization and Evaluation Materials
出版者:Springer New York
ISSN:1557-1947
文摘
Single-domain YBa2Cu3O7?em class="EmphasisTypeItalic">δ (YBCO) superconductors with different additions of Nb2O5 have been fabricated by a modified top seeded infiltration growth (TSIG) process. The growth morphology, microstructure and levitation force were investigated in details. The experimental results reveal that Nb2O5 can react with precursor powders in the TSIG process and finally form nanometer Y2Ba4CuNbO x (YNb2411) particles which can act as effective flux pinning centers. The content addition of Nb2O5 has sensitive effect on microstructure and superconductive property of YBCO bulks The levitation force increases firstly from 30 to 36 N and then reduces down to 21 N with the increasing of Nb2O5 additions from 0.1 to 0.9 wt% and 1.5 wt%. These results indicate a high-efficient method to improve the properties of YBCO bulks.