20 nm MgB₂ superconducting film with T_C above 34 K and J_C 鈭?#xa0;10⁶ A cm^鈭? at 30 K

详细信息	查看全文 | 推荐本文 |

• 作者：Qian Dai ; ^{daiqian_wl@yahoo.com.cn} ; Yinbo Wang ; Xiaobai Ma ; Qianqian Yang ; Huai Zhang ; Ruijuan Nie ; Qingrong Feng ; Furen Wang
• 关键词：MgB2 ; Thin films ; E-Beam evaporation
• 刊名：Physica C
• 出版年：2012
• 期刊代码：80_09214534
• 类别：ms
• 出版时间：May, 2012
• 卷：475
• 期：Complete
• 页码：57-59
• 文件大小：306 K

摘要

MgB₂ thin films were prepared by ex-situ annealing of Mg/B multilayers. Different precursor, substrate and annealing condition were investigated. After annealed in a flow of Mg vapor with reducing hydrogen ambient for 1-4 min, high quality 20 nm-thick c-oriented MgB₂ thin films with and critical current density J_C = 2 脳 10⁶ A cm^鈭? at 30 K were obtained. The mean roughness of the 20 nm-thick film was 2.68 nm.