Structural characterization of interfaces in epitaxial Fe/MgO/Fe magnetic tunnel junctions by transmission electron microscopy
文献类型：期刊论文
| 作者 | Wang, C ; Kohn, A ; Wang, SG ; Chang, LY ; Choi, SY ; Kirkland, AI ; Petford-Long, AK ; Ward, RCC |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2010 |
| 卷号 | 82期号:2 |
| 关键词 | SPHERICAL-ABERRATION ROOM-TEMPERATURE MGO RESOLUTION FE(001) ENERGY FE MAGNETORESISTANCE MGO(001) SURFACE |
| ISSN号 | 1098-0121 |
| 通讯作者 | Kohn, A (reprint author), Ben Gurion Univ Negev, Ilse Katz Inst Nanoscale Sci & Technol, Dept Mat Engn, IL-84105 Beer Sheva, Israel. |
| 中文摘要 | We present a detailed structural characterization of the interfaces in Fe/MgO/Fe layers grown by molecular-beam epitaxy using aberration-corrected transmission electron microscopy (TEM), scanning TEM, and electron energy-loss spectroscopy. When fabricated into magnetic tunnel junctions, these epitaxial devices exhibit large tunnel magnetoresistance ratios (e.g., 318% at 10 K), though still considerably lower than the values predicted theoretically. The reason for this discrepancy is being debated and has been attributed to the structure of, and defects at the interface, namely, the relative position of the atoms, interface oxidation, strain, and structural asymmetry of the interfaces. In this structural study, we observed that Fe is bound to O at the interfaces. The interfaces are semicoherent and mostly sharp with a minor degree of oxidation. A comparison of the two interfaces shows that the top MgO/Fe interface is rougher. |
| 收录类别 | SCI |
| 资助信息 | Engineering and Physical Sciences Research Council (EPSRC); National Basic Research Program of China [2009CB929203]; National Natural Science Foundation of China [50972163]; Argonne National Laboratory; U.S. Department of Energy, Basic Energy Sciences [DE-AC02-06CH11357] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53289]  |
| 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, C,Kohn, A,Wang, SG,et al. Structural characterization of interfaces in epitaxial Fe/MgO/Fe magnetic tunnel junctions by transmission electron microscopy[J]. PHYSICAL REVIEW B,2010,82(2). |
| APA | Wang, C.,Kohn, A.,Wang, SG.,Chang, LY.,Choi, SY.,...&Ward, RCC.(2010).Structural characterization of interfaces in epitaxial Fe/MgO/Fe magnetic tunnel junctions by transmission electron microscopy.PHYSICAL REVIEW B,82(2). |
| MLA | Wang, C,et al."Structural characterization of interfaces in epitaxial Fe/MgO/Fe magnetic tunnel junctions by transmission electron microscopy".PHYSICAL REVIEW B 82.2(2010). |
入库方式： OAI收割
来源：物理研究所
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