Direct observation of imprinted antiferromagnetic vortex states in CoO/Fe/Ag(001) discs
文献类型：期刊论文
| 作者 | Wu, J ; Carlton, D ; Park, JS ; Meng, Y ; Arenholz, E ; Doran, A ; Young, AT ; Scholl, A ; Hwang, C ; Zhao, HW ; Bokor, J ; Qiu, ZQ |
| 刊名 | NATURE PHYSICS
 |
| 出版日期 | 2011 |
| 卷号 | 7期号:4页码:303 |
| 关键词 | DYNAMICS FIELD |
| ISSN号 | 1745-2473 |
| 通讯作者 | Qiu, ZQ: Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. |
| 中文摘要 | In magnetic thin films, a magnetic vortex is a state in which the magnetization vector curls around the centre of a confined structure(1). In a thin-film disc, vortex states are characterized by the vortex polarity and the winding number(2,3). In ferromagnetic (FM) discs, these two parameters have been shown to govern many fundamental properties of the vortex, such as its gyroscopic rotation(4), polarity reversal(5-7), core motion(8) and vortex-pair excitation(9). In antiferromagnetic (AFM) discs(10), in contrast, there has been only indirect evidence for a vortex state, obtained through the observation of induced FM-ordered spins in the AFMdisc(11-14). Here we report the direct observation of an AFM vortex state in the AFM layer of an AFM/FM bilayer system. We have fabricated single-crystalline NiO/Fe/Ag(001) and CoO/Fe/Ag(001) discs, and using X-ray magnetic linear dichroism techniques we observe two types of AFM vortex, one of which has no analogue in FM structures. We also show that a frozen AFM vortex can bias an FM vortex at low temperature. |
| 收录类别 | SCI |
| 资助信息 | National Science Foundation [DMR-0803305]; US Department of Energy [DE-AC02-05CH11231]; Korea Foundation for International Cooperation of Science and Technology; Chinese Education Department; Western Institute of Nanoelectronics |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/36051]  |
| 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 | Wu, J,Carlton, D,Park, JS,et al. Direct observation of imprinted antiferromagnetic vortex states in CoO/Fe/Ag(001) discs[J]. NATURE PHYSICS,2011,7(4):303. |
| APA | Wu, J.,Carlton, D.,Park, JS.,Meng, Y.,Arenholz, E.,...&Qiu, ZQ.(2011).Direct observation of imprinted antiferromagnetic vortex states in CoO/Fe/Ag(001) discs.NATURE PHYSICS,7(4),303. |
| MLA | Wu, J,et al."Direct observation of imprinted antiferromagnetic vortex states in CoO/Fe/Ag(001) discs".NATURE PHYSICS 7.4(2011):303. |
入库方式： OAI收割
来源：物理研究所
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