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DOI | 10.1038/s41467-017-00509-4 |
Magnetization reversal driven by low dimensional chaos in a nanoscale ferromagnet | |
Montoya, Eric Arturo1; 39;Aquino, Massimiliano2 | |
2019-02-01 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2019 |
卷号 | 10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Italy |
英文摘要 | Energy-efficient switching of magnetization is a central problem in nonvolatile magnetic storage and magnetic neuromorphic computing. In the past two decades, several efficient methods of magnetic switching were demonstrated including spin torque, magneto-electric, and microwave-assisted switching mechanisms. Here we experimentally show that low-dimensional magnetic chaos induced by alternating spin torque can strongly increase the rate of thermally-activated magnetic switching in a nanoscale ferromagnet. This mechanism exhibits a well-pronounced threshold character in spin torque amplitude and its efficiency increases with decreasing spin torque frequency. We present analytical and numerical calculations that quantitatively explain these experimental findings and reveal the key role played by low-dimensional magnetic chaos near saddle equilibria in enhancement of the switching rate. Our work unveils an important interplay between chaos and stochasticity in the energy assisted switching of magnetic nanosystems and paves the way towards improved energy efficiency of spin torque memory and logic. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000457440700008 |
WOS关键词 | NANOMAGNETS SUBJECT ; RESONANCE ; ESCAPE ; BASIN |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/203423 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA; 2.Univ Naples Federico II, Dept Elect Engn & Informat Technol, I-80125 Naples, Italy; 3.Western Digital, 5600 Great Oaks Pkwy, San Jose, CA 95119 USA; 4.Univ Naples Parthenope, Engn Dept, I-80143 Naples, Italy |
推荐引用方式 GB/T 7714 | Montoya, Eric Arturo,39;Aquino, Massimiliano. Magnetization reversal driven by low dimensional chaos in a nanoscale ferromagnet[J]. NATURE COMMUNICATIONS,2019,10. |
APA | Montoya, Eric Arturo,&39;Aquino, Massimiliano.(2019).Magnetization reversal driven by low dimensional chaos in a nanoscale ferromagnet.NATURE COMMUNICATIONS,10. |
MLA | Montoya, Eric Arturo,et al."Magnetization reversal driven by low dimensional chaos in a nanoscale ferromagnet".NATURE COMMUNICATIONS 10(2019). |
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