Magnetic reversal processes and critical thickness in FePt/alpha-Fe/FePt trilayers
文献类型：期刊论文
| 作者 | Guo, NL ; Zhao, GP ; Zhang, HW ; Zhou, XL ; Deng, Y |
| 刊名 | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
 |
| 出版日期 | 2011 |
| 卷号 | 323期号:23页码:3049 |
| 关键词 | EXCHANGE-COUPLED NANOLAYERS NUCLEATION COERCIVITY |
| ISSN号 | 0304-8853 |
| 通讯作者 | Zhao, GP: Sichuan Normal Univ, Coll Phys & Elect Engn, Chengdu 610068, Peoples R China. |
| 中文摘要 | Magnetic reversal processes of a FePt/alpha-Fe/FePt trilayer system with in-plane easy axes have been investigated within a micromagnetic approach. It is found that the magnetic reversal process consists of three steps: nucleation of a prototype of domain wall in the soft phase, the evolution as well as the motion of the domain wall from the soft to the hard phase and finally, the magnetic reversal of the hard phase. For small soft layer thickness L(s), the three steps are reduced to one single step, where the magnetizations in the two phases reverses simultaneously and the hysteresis loops are square with nucleation as the coercivity mechanism. As L(s) increases, both nucleation and pinning fields decrease. In the meantime, the single-step reversal expands to a standard three-step one and the coercivity mechanism changes from nucleation to pinning. The critical thickness where the coercivity mechanism alters, could be derived analytically, which is found to be inversely proportional to the square root of the crystalline anisotropy of the hard phase. Such a scaling law might provide an easy way to test the present theory. Further increase of L(s) leads to the change of the coercivity mechanism from pinning to nucleation. (C) 2011 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [10747007, 11074179]; Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41418]  |
| 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 | Guo, NL,Zhao, GP,Zhang, HW,et al. Magnetic reversal processes and critical thickness in FePt/alpha-Fe/FePt trilayers[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2011,323(23):3049. |
| APA | Guo, NL,Zhao, GP,Zhang, HW,Zhou, XL,&Deng, Y.(2011).Magnetic reversal processes and critical thickness in FePt/alpha-Fe/FePt trilayers.JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,323(23),3049. |
| MLA | Guo, NL,et al."Magnetic reversal processes and critical thickness in FePt/alpha-Fe/FePt trilayers".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 323.23(2011):3049. |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。