Structural and magnetic changes in MgO-based magnetic tunneling junctions during the early stages of annealing
文献类型：期刊论文
| 作者 | Anderson, GIR ; Wei, HX ; Porter, NA ; Arena, DA ; Dvorak, J ; Han, XF ; Marrows, CH |
| 刊名 | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
 |
| 出版日期 | 2010 |
| 卷号 | 322期号:6页码:756 |
| 关键词 | ROOM-TEMPERATURE MAGNETORESISTANCE SCATTERING ASYMMETRY FILMS |
| ISSN号 | 0304-8853 |
| 通讯作者 | Marrows, CH (reprint author), Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England. |
| 中文摘要 | We have studied the effects of the initial stages of the annealing on magnetic tunnel junctions with MgO barriers and CoFeB electrodes. We report changes in the resistance-voltage characteristics and tunneling magnetoresistance for patterned transport junctions, and correlate these with the observed changes in the structural and magnetic interface morphologies determined by soft X-ray resonant magnetic scattering from sheet films from the same wafer. An important feature of our experiment was that all measurements were carried out within the soft X-ray diffractometer on samples from the same wafer subjected to simultaneous annealing cycles, so that our magnetotransport and scattering data are directly comparable. The as-grown junction showed a tunneling magnetoresistance ratio of 5.5%, and a specific barrier resistance of 85.6 k Omega mu m(2). A 200 degrees C anneal for 1 h resulted in a small rise in barrier resistance and magnetoresistance coupled with a smoothing of the magnetic interfaces, consistent with the healing of barrier defects and removal of tunneling hot-spots. A subsequent 300 degrees C anneal for a further hour resulted in further smoothing, and a rise in the magnetoresistance ratio to 72%, and a much weaker dependence of the parallel state resistance upon voltage bias, indicating the development of (0 0 1) crystallographic texture in the electrodes. Annealing to 325 degrees C yielded a further decrease in magnetic interface width (the quadrature sum of roughness and intermixing length scales). The reduction in interface width for Co species occurred at higher temperatures than for Fe throughout the experiments. (C) 2009 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 资助信息 | EPSRC; Royal Society; Department of Energy Office of Basic Energy Sciences; Chinese MOST [2006CB932200]; National Natural Science Foundation of China [10874225, 50721001] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53208]  |
| 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 | Anderson, GIR,Wei, HX,Porter, NA,et al. Structural and magnetic changes in MgO-based magnetic tunneling junctions during the early stages of annealing[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2010,322(6):756. |
| APA | Anderson, GIR.,Wei, HX.,Porter, NA.,Arena, DA.,Dvorak, J.,...&Marrows, CH.(2010).Structural and magnetic changes in MgO-based magnetic tunneling junctions during the early stages of annealing.JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,322(6),756. |
| MLA | Anderson, GIR,et al."Structural and magnetic changes in MgO-based magnetic tunneling junctions during the early stages of annealing".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 322.6(2010):756. |
入库方式： OAI收割
来源：物理研究所
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