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Roles of heating and helicity in ultrafast all-optical magnetization switching in TbFeCo
- Publication Year :
- 2018
-
Abstract
- Using the time-resolved magneto-optical Kerr effect method, helicity-dependent all-optical magnetization switching (HD-AOS) is observed in ferrimagnetic TbFeCo films. Our results reveal the individual roles of the thermal and nonthermal effects after a single circularly polarized laser pulse. The evolution of this ultrafast switching occurs over different time scales, and a defined magnetization reversal time of 460 fs is shown—the fastest ever observed. Micromagnetic simulations based on a single macro-spin model, taking into account both heating and the inverse Faraday effect, are performed which reproduce HD-AOS demonstrating a linear path for magnetization reversal.
Details
- Language :
- English
- ISSN :
- 00036951
- Database :
- OpenAIRE
- Accession number :
- edsair.core.ac.uk....8d13a1dcde776e1a73abb0af52ed5aab