Superconductivity and antiferromagnetic ordering in the high-field paramagnetic oxypnictide NdFeAsO(0.94)F(0.06)
文献类型：期刊论文
| 作者 | Tarantini, C ; Gurevich, A ; Larbalestier, DC ; Ren, ZA ; Dong, XL ; Lu, W ; Zhao, ZX |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2008 |
| 卷号 | 78期号:18 |
| 关键词 | CRYSTAL-FIELD ND2O3 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Tarantini, C (reprint author), Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. |
| 中文摘要 | The temperature dependence of giant tunnel magnetoresistance (TMR) in epitaxial Fe/MgO/Fe magnetic tunnel junctions has been investigated. The resistance in the parallel configuration between the bottom (free) Fe layer and the top Fe layer, exchange biased by an IrMn antiferromagnetic layer, is nearly independent of the temperature. In contrast, in the antiparallel configuration the resistance increases with decreasing temperature, resulting in an increase in the TMR ratio from 170% at room temperature to 318% at 10 K. The dynamic conductance (G' = dI/dV) in the parallel configuration shows flat bias voltage dependence in the range +/- 0.4 V, but in the antiparallel configuration it shows typical parabolic behavior as a function of bias voltage. A model, based on the temperature dependence of magnetic disorder in the two electrodes and its effect on the spin-dependent tunneling, is proposed to describe the temperature dependence of the TMR ratio and the resistance, in good agreement with our experimental data. |
| 收录类别 | SCI |
| 资助信息 | NSF [DMR-0084173]; state of Florida; AFOSR [FA9550-06-1-0474] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53998]  |
| 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 | Tarantini, C,Gurevich, A,Larbalestier, DC,et al. Superconductivity and antiferromagnetic ordering in the high-field paramagnetic oxypnictide NdFeAsO(0.94)F(0.06)[J]. PHYSICAL REVIEW B,2008,78(18). |
| APA | Tarantini, C.,Gurevich, A.,Larbalestier, DC.,Ren, ZA.,Dong, XL.,...&Zhao, ZX.(2008).Superconductivity and antiferromagnetic ordering in the high-field paramagnetic oxypnictide NdFeAsO(0.94)F(0.06).PHYSICAL REVIEW B,78(18). |
| MLA | Tarantini, C,et al."Superconductivity and antiferromagnetic ordering in the high-field paramagnetic oxypnictide NdFeAsO(0.94)F(0.06)".PHYSICAL REVIEW B 78.18(2008). |
入库方式： OAI收割
来源：物理研究所
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