Large magnetoresistance and metamagnetic transition in PrGa
文献类型：期刊论文
| 作者 | Chen, J ; Zheng, XQ ; Dong, QY ; Sun, JR ; Shen, BG |
| 刊名 | APPLIED PHYSICS LETTERS
 |
| 出版日期 | 2011 |
| 卷号 | 99期号:12 |
| ISSN号 | 0003-6951 |
| 关键词 | GIANT MAGNETORESISTANCE HYPERFINE INTERACTIONS ATOMS |
| 通讯作者 | Shen, BG: Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China. |
| 中文摘要 | The magnetic properties of the newly discovered iron-oxypnictide SmFeAsO0.85 high-T-c superconductor with a T-c of around 55 K were investigated. Bulk SmFeAsO0.85 was prepared by a method for high-pressure synthesis. The lower critical field H-c1 was estimated from the magnetization at low fields; H-c1(0) was measured to be 212 Oe. A linear temperature dependence instead of saturation at low temperatures in H-c1(T) revealed unconventional superconductivity with a nodal gap structure in our SmFeAsO0.85 superconductor. The results showed that the well-known secondary peak in the temperature dependence of the critical current density J(c) is absent in the SmFeAsO0.85 high-T-c superconductor. The irreversibility line B-irr was fitted well by the power law dependence (1 -T/T-c)(n) with n similar to 1.5. This is indicative of the flux creep phenomena in the SmFeAsO0.85 high-T-c superconductor. In addition, within the range of measurement temperatures in this study, no crossover was observed in the temperature dependence of the irreversibility line B-irr which may be due to low anisotropy in our SmFeAsO0.85 superconductor. |
| 资助信息 | National Natural Science Foundation of China [50731007, 51021061]; Chinese Academy of Sciences; Hi-Tech Research and Development Program of China |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/40612]  |
| 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 | Chen, J,Zheng, XQ,Dong, QY,et al. Large magnetoresistance and metamagnetic transition in PrGa[J]. APPLIED PHYSICS LETTERS,2011,99(12). |
| APA | Chen, J,Zheng, XQ,Dong, QY,Sun, JR,&Shen, BG.(2011).Large magnetoresistance and metamagnetic transition in PrGa.APPLIED PHYSICS LETTERS,99(12). |
| MLA | Chen, J,et al."Large magnetoresistance and metamagnetic transition in PrGa".APPLIED PHYSICS LETTERS 99.12(2011). |
入库方式： OAI收割
来源：物理研究所
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