Competition between cotunneling, Kondo effect, and direct tunneling in discontinuous high-anisotropy magnetic tunnel junctions
文献类型：期刊论文
| 作者 | Ciudad, D ; Wen, ZC ; Hindmarch, AT ; Negusse, E ; Arena, DA ; Han, XF ; Marrows, CH |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2012 |
| 卷号 | 85期号:21 |
| ISSN号 | 1098-0121 |
| 关键词 | SINGLE-ELECTRON TRANSISTOR EXCHANGE MODEL MAGNETORESISTANCE ANOMALIES NANOPARTICLES |
| 通讯作者 | Ciudad, D: Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England. |
| 中文摘要 | The transition between Kondo and Coulomb blockade effects in discontinuous double magnetic tunnel junctions is explored as a function of the size of the CoPt magnetic clusters embedded between AlOx tunnel barriers. A gradual competition between cotunneling enhancement of the tunneling magnetoresistance (TMR) and the TMR suppression due to the Kondo effect has been found in these junctions, with both effects having been found to coexist even in the same sample. It is possible to tune between these two states with temperature (at a temperature far below the cluster blocking temperature). In addition, when further decreasing the size of the CoPt clusters, another gradual transition between the Kondo effect and direct tunneling between the electrodes takes place. This second transition shows that the spin-flip processes found in junctions with impurities in the barrier are in fact due to the Kondo effect. A simple theoretical model able to account for these experimental results is proposed. |
| 资助信息 | UK EPSRC; Royal Society; Ministry of Science and Technology [MOST] [2010CB934400]; National Natural Science Foundation of China [NSFC] [10934099, 10874225, 51021061]; Wong Education Foundation, Hong Kong; US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]; Spanish Ministry of Science and Innovation [2008-0352]; Marie Curie International Outgoing Fellowship within the European 7th Framework Programme |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/34976]  |
| 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 | Ciudad, D,Wen, ZC,Hindmarch, AT,et al. Competition between cotunneling, Kondo effect, and direct tunneling in discontinuous high-anisotropy magnetic tunnel junctions[J]. PHYSICAL REVIEW B,2012,85(21). |
| APA | Ciudad, D.,Wen, ZC.,Hindmarch, AT.,Negusse, E.,Arena, DA.,...&Marrows, CH.(2012).Competition between cotunneling, Kondo effect, and direct tunneling in discontinuous high-anisotropy magnetic tunnel junctions.PHYSICAL REVIEW B,85(21). |
| MLA | Ciudad, D,et al."Competition between cotunneling, Kondo effect, and direct tunneling in discontinuous high-anisotropy magnetic tunnel junctions".PHYSICAL REVIEW B 85.21(2012). |
入库方式： OAI收割
来源：物理研究所
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