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Induced versus intrinsic magnetic moments in ultrafast magnetization dynamics

Title
Induced versus intrinsic magnetic moments in ultrafast magnetization dynamics
Authors
Hofherr, M.Moretti, S.Shim, J.Häuser, S.Safonova, N. Y.Stiehl, M.Ali, A.Sakshath, S.Kim, J. W.Kim, D. H.Kim, Hyun JoongHong, Jung-IlKapteyn, H. C.Murnane, M. M.Cinchetti, M.Steil, D.Mathias, S.Stadtmuller, B.Albrecht, M.Kim, D. E.Nowak, U.Aeschlimann, M.
DGIST Authors
Hong, Jung-Il
Issue Date
2018-11
Citation
Physical Review B, 98(17)
Type
Article
Article Type
Article
Keywords
THERMAL-CONDUCTIVITYCIRCULAR-DICHROISMALLOYSELECTRONIRONPDTEMPERATUREMETALSFILMSFEPT
ISSN
2469-9950
Abstract
Ferromagnetic metal alloys are today commonly used in spintronic and magnetic data storage devices. These multicompound structures consist of several magnetic sublattices exhibiting both intrinsic and induced magnetic moments. Here, we study the response of the element-specific magnetization dynamics for thin film systems based on purely intrinsic (CoFeB) and partially induced (FePt) magnetic moments using extreme ultraviolet pulses from high-harmonic generation (HHG) as an element-sensitive probe. In FePt, on the one hand, we observe an identical normalized transient magnetization for Fe and Pt throughout both the ultrafast demagnetization and the subsequent remagnetization. On the other hand, Co and Fe show a clear difference in the asymptotic limit of the remagnetization process in CoFeB, which is supported by calculations for the temperature-dependent behavior of the equilibrium magnetization using a dynamic spin model. Thus, in this work, we provide a vital step toward a comprehensive understanding of ultrafast light-induced magnetization dynamics in ferromagnetic alloys with sublattices of intrinsic and induced magnetic moments. © 2018 American Physical Society.
URI
http://hdl.handle.net/20.500.11750/9469
DOI
10.1103/PhysRevB.98.174419
Publisher
American Physical Society
Related Researcher
  • Author Hong, Jung-Il Spin Nanotech Laboratory
  • Research Interests Electric and Magnetic Properties of Nanostructured Materials; Spintronics
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceSpin Nanotech Laboratory1. Journal Articles


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