| Cu位La、 Gd掺杂YBa2Cu3O7-δ结构和磁通钉扎的比较 |
| |
| 引用本文： | 徐胜,顾艳妮,吴小山.Cu位La、 Gd掺杂YBa2Cu3O7-δ结构和磁通钉扎的比较[J].低温与超导,2011,39(8):32-35. |
| |
| 作者姓名： | 徐胜 顾艳妮 吴小山 |
| |
| 作者单位： | 1. 江苏科技大学张家港校区基础部,张家港,215600
2. 南京大学物理学院,南京,210093 |
| |
| 基金项目： | 江苏科技大学博士科研启动基金(35270802);江苏科技大学基金(37270901、33271001)资助 |
| |
| 摘 要： | 多晶样品YBa2Cu3-xLaxO7-δ(0≤x≤0.15)和YBa2Cu3-xGdxO7-δ(0≤x≤0.15)通过固相反应法制备得来.通过结构参数分析,我们发现La首先替代Cu(1)位,然后开始部分替代Ba,而Gd开始替代Cu(2)位然后替代Cu(1)位.YBa2Cu3-xLaxO7-δ和YBa2Cu3-xGdxO...
|
| 关 键 词： | YBa2Cu3O7-δ 稀土替代 Cu位 结构 临界电流密度 |
Comparison of flux pinning with structure for Lanthanum and Gadolinium replacing for Copper in YBa2Cu3O7- δ |
| |
| Xu Sheng,Gu Yangni,Wu Xiaoshan.Comparison of flux pinning with structure for Lanthanum and Gadolinium replacing for Copper in YBa2Cu3O7- δ[J].Cryogenics and Superconductivity,2011,39(8):32-35. |
| |
| Authors: | Xu Sheng Gu Yangni Wu Xiaoshan |
| |
| Institution: | Xu Sheng1,Gu Yangni1,Wu Xiaoshan2 (1.Zhangjiagang Campus,Jiangsu University of Science and Technology,Zhangjiagang 215600,China,2.Nanjing University,Nanjing 210093,China) |
| |
| Abstract: | The poly-crystallized samples of YBa2Cu3-xLaxO7-δ(0≤x≤0.15) and Y(Ba1-xGdx)2Cu3O7-δ(0≤x≤0.15)were prepared by standard solid state reactions method.By analysis of the structural parameters,we found that La prefers to occupy Cu(1) sites then partially occupy Ba sites,while Gd prefers to occupy Cu(2)sites then Cu(1) sites.Tc for YBa2Cu3-xLaxO7-δ and Y(Ba1-xGdx)2Cu3O7-δ change zigzagly and decrease with increasing x.Obviously,a little La or Gd-doping can enhance Jc.The optimal doping content of YBa2Cu3-xLaxO7-δ(0.04) is less than YBa2Cu3-xGdxO7-δ(0.07),because magnetic Gd3+ ions can generate field-induced type pinning centers but nonmagnetic La3+ ions can′t. |
| |
| Keywords: | YBa2Cu3O7-δ Rare-earth substitution Cu site Structure Critical current density |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
