| Analysis and control of ultrafast demagnetization dynamics in ferrimagnetic Gdx(CoFe)1-x alloys | |
| Zhang, L.L.1; Wang, T.1; He, X.D.1; Wu, G.J.2; Gao, J.W.1; Ran, P.1; Zhang, R.H.1; Yang, C.Y.1; Mao, J.1; Zhou, X.W.1; Liu, Z.1; Ren, Y.1; Xi, L.3; Jin, Q.Y.2; Zhang, Zongzhi2 | |
| 2022-12-10 | |
| Source Publication | Journal of Alloys and Compounds
 |
| ISSN | 0925-8388 |
| Volume | 926 |
| Abstract | Deep understanding and powerful control of the magnetization dynamics is of great importance for developing high speed spintronic devices. In this work, laser-induced ultrafast demagnetization process of Gdx(CoFe)1-x alloy films has been extensively studied by using the fs-laser pump-probe technique. Interestingly, it is found that by adjusting the Gd content x and hence the intersublattice 3d-4f exchange coupling strength, the demagnetization dynamics varies from a fast one-stage decay to a continuous or a discrete two-stage decay, which is mainly resulted from the different energy transfer rates via the intersublattice exchange coupling and has been well simulated by considering the Elliott-Yafet type spin-flip scattering theory and the 4-Temperature model. Moreover, we observed that the second-stage decay time is strongly dependent on the external magnetic field, which is analyzed theoretically and suggests an origin of ultrafast giant magnetic cooling effect via the modulation of lattice-spin coupling. These studies are quite helpful for achieving the efficient manipulation of ultrafast magnetization behaviors. © 2022 Elsevier B.V. |
| Keyword | Demagnetization Dynamics Energy transfer Exchange coupling Ferrimagnetism Magnetization Pumping (laser) Spin dynamics Analysis and controls Demagnetization process Ferrimagnetic alloy Ferrimagnetics High Speed Intersublattice exchange coupling Laser induced Magnetization dynamics Spintronics device Ultrafast demagnetization |
| Publisher | Elsevier Ltd |
| DOI | 10.1016/j.jallcom.2022.166769 |
| Indexed By | EI |
| Language | 英语 |
| EI Accession Number | 20223412606448 |
| EI Keywords | Alloys |
| EI Classification Number | 531.1 Metallurgy ; 701.2 Magnetism: Basic Concepts and Phenomena ; 708.4 Magnetic Materials ; 744.1 Lasers, General ; 931.3 Atomic and Molecular Physics |
| Original Document Type | Journal article (JA) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.lzu.edu.cn/handle/262010/486299 |
| Collection | 兰州大学 |
| Corresponding Author | Ren, Y. |
| Affiliation | 1.School of Physics and Astronomy and Yunnan Key Laboratory for Quantum Information, Yunnan University, Kunming; 650091, China; 2.School of Information Science and Technology, Fudan University, Shanghai; 200433, China; 3.Key Lab for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou; 730000, China |
| Recommended Citation GB/T 7714 | Zhang, L.L.,Wang, T.,He, X.D.,et al. Analysis and control of ultrafast demagnetization dynamics in ferrimagnetic Gdx(CoFe)1-x alloys[J]. Journal of Alloys and Compounds,2022,926. |
| APA | Zhang, L.L..,Wang, T..,He, X.D..,Wu, G.J..,Gao, J.W..,...&Zhang, Zongzhi.(2022).Analysis and control of ultrafast demagnetization dynamics in ferrimagnetic Gdx(CoFe)1-x alloys.Journal of Alloys and Compounds,926. |
| MLA | Zhang, L.L.,et al."Analysis and control of ultrafast demagnetization dynamics in ferrimagnetic Gdx(CoFe)1-x alloys".Journal of Alloys and Compounds 926(2022). |
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