CeO_2和Y_2Ba_1Cu_1O_(5-δ)共同掺杂对Y_1Ba_2Cu_3O_(7-δ)的超导电性及其晶格结构的影响

Effect of Y_2Ba_1Cu_1O_(5-δ) and CeO_2 doping on superconducting properties and Structure of Y_1Ba_2Cu_3O_(7-δ)

采用固相反应法成功制备出一批Y123与Y211的摩尔比为1∶0.47的混合物,并在此混合物的基础上掺入CeO2,掺入的比例x分别为0.5wt%、1.0wt%、2.0wt%、3.0wt%、4.0wt%。采用了X-射线衍射仪对样品的晶格结构进行了分析,测量结果表明:x=1.0wt%时掺杂效果最好,同时也充分说明Y123的晶格结构与其超导电性之间存在着一种内在的必然关联。并通过对其测试临界转变温度以及转变宽度,测量结果也充分验证了上述结论。

A series of superconductor samples that the molar ratio of Y123 and Y21l is 1 ： 0.47 were prepared by solid -state reaction method. CeO2 was doped into samples with x proportion of 0.5 wt %, 1.0wt%, 2.0wt%, 3.0wt%, 4.0wt%. The pa- per adopted the X - ray diffraction to analyze the sample lattice structure. The results show thatl. 0wt% is the best doping ra- tion. At the same time, this paper also analyzed intrinsic association existing between lattice structure and superconductivity. And through testing critical transition temperature and changing the width, measuring results validate the above conclusion.