The indispensable role of the transversal spin fluctuations mechanism in laser-induced demagnetization of co/pt multilayers with nanoscale magnetic domains
文献类型：期刊论文
| 作者 | Zhang,Wei1,2; He,Wei1; Peng,Li-Cong1,2; Zhang,Ying1; Cai,Jian-Wang1,2; Evans,Richard F L3; Zhang,Xiang-Qun1; Cheng,Zhao-Hua1,2 |
| 刊名 | Nanotechnology
 |
| 出版日期 | 2018-05-04 |
| 卷号 | 29期号:27 |
| 关键词 | Ultrafast spin dynamics Nanoscale magnetic domains structures Trmoke 75.78.jp 75.40.gb 76.50.+g 78.47.+p |
| ISSN号 | 0957-4484 |
| DOI | 10.1088/1361-6528/aabdc9 |
| 英文摘要 | Abstract the switching of magnetic domains induced by an ultrashort laser pulse has been demonstrated in nanostructured ferromagnetic films. this leads to the dawn of a new era in breaking the ultimate physical limit for the speed of magnetic switching and manipulation, which is relevant to current and future information storage. however, our understanding of the interactions between light and spins in magnetic heterostructures with nanoscale domain structures is still lacking. here, both time-resolved magneto-optical kerr effect experiments and atomistic simulations are carried out to investigate the dominant mechanism of laser-induced ultrafast demagnetization in [co/pt]20 multilayers with nanoscale magnetic domains. it is found that the ultrafast demagnetization time remains constant with various magnetic configurations, indicating that the domain structures play a minor role in laser-induced ultrafast demagnetization. in addition, both in experiment and atomistic simulations, we find a dependence of ultrafast demagnetization time τm on the laser fluence, which is in contrast to the observations of spin transport within magnetic domains. the remarkable agreement between experiment and atomistic simulations indicates that the local dissipation of spin angular momentum is the dominant demagnetization mechanism in this system. more interestingly, we made a comparison between the atomistic spin dynamic simulation and the longitudinal spin flip model, highlighting that the transversal spin fluctuations mechanism is responsible for the ultrafast demagnetization in the case of inhomogeneous magnetic structures. this is a significant advance in clarifying the microscopic mechanism underlying the process of ultrafast demagnetization in inhomogeneous magnetic structures. |
| 语种 | 英语 |
| WOS记录号 | IOP:0957-4484-29-27-AABDC9 |
| 出版者 | IOP Publishing |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373994 |
| 专题 | 物理研究所 |
| 作者单位 | 1.State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China 2.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 3.Department of Physics, The University of York, Heslington, York YO10 5DD, United Kingdom |
| 推荐引用方式 GB/T 7714 | Zhang,Wei,He,Wei,Peng,Li-Cong,et al. The indispensable role of the transversal spin fluctuations mechanism in laser-induced demagnetization of co/pt multilayers with nanoscale magnetic domains[J]. Nanotechnology,2018,29(27). |
| APA | Zhang,Wei.,He,Wei.,Peng,Li-Cong.,Zhang,Ying.,Cai,Jian-Wang.,...&Cheng,Zhao-Hua.(2018).The indispensable role of the transversal spin fluctuations mechanism in laser-induced demagnetization of co/pt multilayers with nanoscale magnetic domains.Nanotechnology,29(27). |
| MLA | Zhang,Wei,et al."The indispensable role of the transversal spin fluctuations mechanism in laser-induced demagnetization of co/pt multilayers with nanoscale magnetic domains".Nanotechnology 29.27(2018). |
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来源：物理研究所
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