兰州大学机构库 >物理科学与技术学院
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
Online publication date2022-08
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
ISSN0925-8388
EISSN1873-4669
Volume926
page numbers7
AbstractDeep 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.
KeywordDemagnetization 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 Ferrimagnetic alloys
PublisherElsevier Ltd
DOI10.1016/j.jallcom.2022.166769
Indexed ByEI ; SCIE
Language英语
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000848445000002
EI Accession Number20223412606448
EI KeywordsAlloys
EI Classification Number531.1 Metallurgy ; 701.2 Magnetism: Basic Concepts and Phenomena ; 708.4 Magnetic Materials ; 744.1 Lasers, General ; 931.3 Atomic and Molecular Physics
Original Document TypeJournal article (JA) ; Article
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/486299
Collection物理科学与技术学院
Corresponding AuthorRen, 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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