Roles of heating and helicity in ultrafast all-optical magnetization switching in TbFeCo

Abstract

Using time-resolved magneto-optical Kerr effect (TR-MOKE) method, helicity-dependent all-optical magnetization switching (HD-AOS) is observed in ferrimagnetic TbFeCo films. The thermal effect and opto-magneto effects are separately justified after single circularly polarized laser pulse. The integral evolution of this ultrafast switching is characterized on different time scales and the defined magnetization reversal time of 460 fs is the fastest ever observed. Combining the heat effect and inverse Faraday effect (IFE), micromagnetic simulations based on a single macro-spin model are performed that reproduce HD-AOS following a linear reversal mechanism.

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Cited by in corpus (9)

• Role of Element-Specific Damping on the Ultrafast, Helicity-Independent All-Optical Switching Dynamics in Amorphous (Gd,Tb)Co Thin Films
• Enhancement of intrinsic magnetic damping in defect-free epitaxial Fe3O4 thin films
• Applications of Nanomagnets as Dynamical Systems
• Understanding all-optical spin switching: Comparison between experiment and theory
• All optical resonant magnetization switching in ${\text{CrI}}_3$ monolayers
• Ultrafast single-pulse all-optical switching in synthetic ferrimagnetic Tb/Co/Gd multilayers
• Plasmonic dichroism and all-optical magnetization switching in nanophotonic structures with GdFeCo
• Strongly modulated ultrafast demagnetization and magnetization precession dynamics in ferrimagnetic Gdx(CoFe)1-x alloys via 3d-4f intersublattice exchange coupling
• Timescales and contribution of heating and helicity effect in helicity-dependent all-optical switching