本文采用柠檬酸热分解法成功制备出了Y1-xCk（Ba1-xCex）2Cu3O7-δ（x=O、0．03、0．05、0．07、0．09）的一系列样品．我们采用标准的四端引线法对系列样品的超导电性进行了测量，测量结果表明：随着掺杂量X的不断增加，Y123的起始转变温度Tonset和临界转变温度Tc都在逐渐降低．利用X射线衍射仪对系列样品的晶格结构进行了表征分析，测量结果充分验证了上述结论，同时我们也简单阐述了Y123的晶格结构是如何影响其超导电性的．
A series of Y1-xCk（Ba1-xCex）2Cu3O7-δ（x=O、0.03、0.05、0.07、0.09） prepared using the method of thermal decomposition of citric samples were successfully acid. The samples of superconductivity were measured using normal four terminals method. Measurement results show that the onset temperature Tonset and the critical temperature Tc of Y123 all gradually reduced with the increasing of doping concentration x. The samples of lattice structure were characterized using the X-ray diffraction. Measurement results verify the conclusions fully. At the same time, we described simply that how the change of Y123 lattice structure affects their superconductivity.
参考文献
| [1] | C. H. Cheng;Y. Zhao .Enhancement of J_(c) by doping silver in grain boundaries of YBa_(2)Cu_(3)O_(y) polycrystals with solid-state diffusion method[J].Journal of Applied Physics,2003(4):2292-2294. |
| [2] | X.W. Zou;H. Zhang .Improved J_c properties of Na-doped MTG YBCO[J].Materials Letters,2000(3):171-174. |
| [3] | S K Chen;L Zhou;S Y Zhang .Microstructure of bulk PMP YBCO with submicrometre Y_2BaCuO_5 particles[J].Superconductor Science & Technology,2001(8):618-623. |
| [4] | S. Marinel;D. Grossin;O. Perez;F. Delorme;Z.H. He;C.Y. Lu .Crystal growth orientation and micro structure of Y_(0.9)Ca_(0.1)Ba_2Cu_3O_(7-δ) melt grown bars[J].Journal of Crystal Growth,2005(1/4):437-444. |
| [5] | K Iida;N H Babu;Y-H Shi .The effect of the addition of zirconium-containing compounds on the microstructure and superconducting properties of mono-domain Y-Ba-Cu-O bulk superconductors[J].Superconductor Science & Technology,2005(5):704-709. |
| [6] | 冯建情,周廉,卢亚锋,张平祥,徐晓燕,陈绍楷,张翠萍,熊晓梅,刘国庆.高温超导氧化物YBCO的掺杂效应研究进展[J].稀有金属材料与工程,2007(04):565-568. |
| [7] | H.Y. Pan;X.L. Xu;J.D. Guo .TEM characterization of nanoscale YBCO particles[J].Materials Letters,2003(24/25):3869-3873. |
| [8] | 石庆平,冯喆韵,汪海英,黄参,徐克西.Y1-xCaxBa2Cu3O7-δ烧结样品的直流输运特性[J].低温物理学报,2005(01):18-24. |
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