Cited 3 time in webofscience Cited 2 time in scopus

Role of non-thermal electrons in ultrafast spin dynamics of ferromagnetic multilayer

Title
Role of non-thermal electrons in ultrafast spin dynamics of ferromagnetic multilayer
Authors
Shim, Je-HoSyed, Akbar AliKim, Jea-IlPiao, Hong-GuangLee, Sang-HyukPark, Seung-YoungChoi, Yeon SukLee, Kyung MinKim, Hyun-JoongJeong, Jong-RyulHong, Jung-IlKim, Dong EonKim, Dong-Hyun
DGIST Authors
Shim, Je-Ho; Syed, Akbar Ali; Kim, Jea-Il; Piao, Hong-Guang; Lee, Sang-Hyuk; Park, Seung-Young; Choi, Yeon Suk; Lee, Kyung Min; Kim, Hyun-Joong; Jeong, Jong-Ryul; Hong, Jung-Il; Kim, Dong Eon; Kim, Dong-Hyun
Issue Date
2020-04
Citation
Scientific Reports, 10(1), 6355
Type
Article
Article Type
Article
Keywords
MAGNETIZATION DYNAMICSTRANSPORTMETALSCOPPERHOT
ISSN
2045-2322
Abstract
Understanding of ultrafast spin dynamics is crucial for future spintronic applications. In particular, the role of non-thermal electrons needs further investigation in order to gain a fundamental understanding of photoinduced demagnetization and remagnetization on a femtosecond time scale. We experimentally demonstrate that non-thermal electrons existing in the very early phase of the photoinduced demagnetization process play a key role in governing the overall ultrafast spin dynamics behavior. We simultaneously measured the time-resolved reflectivity (TR-R) and the magneto-optical Kerr effect (TR-MOKE) for a Co/Pt multilayer film. By using an extended three-temperature model (E3TM), the quantitative analysis, including non-thermal electron energy transfer into the subsystem (thermal electron, lattice, and spin), reveals that energy flow from non-thermal electrons plays a decisive role in determining the type I and II photoinduced spin dynamics behavior. Our finding proposes a new mechanism for understanding ultrafast remagnetization dynamics. © 2020, The Author(s).
URI
http://hdl.handle.net/20.500.11750/12602
DOI
10.1038/s41598-020-63452-3
Publisher
Nature Publishing Group
Related Researcher
  • Author Hong, Jung-Il Spin Nanotech Laboratory
  • Research Interests Electric and Magnetic Properties of Nanostructured Materials; Spintronics
Files:
Collection:
Department of Emerging Materials ScienceSpin Nanotech Laboratory1. Journal Articles


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