| Analysis and control of ultrafast demagnetization dynamics in ferrimagnetic Gd-x(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. (c) 2022 Elsevier B.V. All rights reserved. |
| Keyword | Ferrimagnetic alloys Ultrafast demagnetization Intersublattice exchange coupling |
| Publisher | ELSEVIER SCIENCE SA |
| DOI | 10.1016/j.jallcom.2022.166769 |
| Indexed By | SCIE |
| Language | 英语 |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000848445000002 |
| Original Document Type | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.lzu.edu.cn/handle/262010/488415 |
| Collection | 兰州大学 |
| Affiliation | 1.Yunnan Univ, Sch Phys & Astron, Yunnan Key Lab Quantum Informat, Kunming 650091, Peoples R China; 2.Fudan Univ, Sch Informat Sci & Technol, Shanghai 200433, Peoples R China; 3.Lanzhou Univ, Key Lab Magnetism, Magnet Mat Minist Educ, Lanzhou 730000, Peoples R 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 Gd-x(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 Gd-x(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 Gd-x(CoFe)(1-x) alloys".JOURNAL OF ALLOYS AND COMPOUNDS 926(2022). |
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