Enhancement of critical current density and flux pinning in oxygen ion-irradiated MgB2 thin films
文献类型：期刊论文
| 作者 | Wang, J ; Zhuang, CG ; Li, J ; Wu, ZW ; Li, S ; Chu, HF ; Feng, QR ; Zheng, DN |
| 刊名 | SUPERCONDUCTOR SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2009 |
| 卷号 | 22期号:4 |
| 关键词 | SUPERCONDUCTING MGB2 HARD SUPERCONDUCTORS PROTON IRRADIATION IN-SITU FIELD DEPOSITION DEPENDENCE |
| ISSN号 | 0953-2048 |
| 通讯作者 | Wang, J: Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, POB 603, Beijing 100190, Peoples R China. |
| 中文摘要 | The effects of 300 keV O-2(+) ion irradiation on the temperature and magnetic field dependence of the critical current density (J(C)) in high quality epitaxial MgB2 thin films have been studied. Upon irradiation, the critical temperature T-C drops gradually and ultimately to less than 2 K and the residual resistivity increases from about 1 to 125 mu Omega cm with increasing doses. At a moderate radiation level of 1 x 1013 cm(-2), JC is enhanced and its performance in magnetic fields is significantly improved over a certain range of fields applied along the c-axis. The scaling behavior of reduced pinning force with reduced field reveals that the flux pinning mechanism evolves from grain-boundary-like pinning in the pristine and lightly irradiated films, to point-like pinning in moderately irradiated films, and again to grain-boundary-like pinning in heavily irradiated films. It is then concluded that point-like pinning centers, which can be modified by the damage level, have been introduced after oxygen ion irradiation. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [10574154, 50672125]; Ministry of Science and Technology of China |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/37407]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wang, J,Zhuang, CG,Li, J,et al. Enhancement of critical current density and flux pinning in oxygen ion-irradiated MgB2 thin films[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2009,22(4). |
| APA | Wang, J.,Zhuang, CG.,Li, J.,Wu, ZW.,Li, S.,...&Zheng, DN.(2009).Enhancement of critical current density and flux pinning in oxygen ion-irradiated MgB2 thin films.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,22(4). |
| MLA | Wang, J,et al."Enhancement of critical current density and flux pinning in oxygen ion-irradiated MgB2 thin films".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 22.4(2009). |
入库方式： OAI收割
来源：物理研究所
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