Role of non-thermal electrons in ultrafast spin dynamics of ferromagnetic multilayer
SCIE
SCOPUS
- Title
- Role of non-thermal electrons in ultrafast spin dynamics of ferromagnetic multilayer
- Authors
- Shim J.-H.; Syed A.A.; Kim J.-I.; Piao H.-G.; Lee S.-H.; Park S.-Y.; Choi Y.S.; Lee K.M.; Kim H.-J.; Jeong J.-R.; Hong J.-I.; Kim D.E.; Kim D.-H.
- Date Issued
- 2020-04
- Publisher
- NATURE PUBLISHING GROUP
- 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.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/105616
- DOI
- 10.1038/s41598-020-63452-3
- ISSN
- 2045-2322
- Article Type
- Article
- Citation
- SCIENTIFIC REPORTS, vol. 10, no. 1, 2020-04
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- There are no files associated with this item.
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