Helicity-dependent all-optical domain wall motion in ferromagnetic thin films
arXiv:1709.07645 · doi:10.1103/PhysRevB.97.054419
Abstract
Domain wall displacement in Co/Pt thin films induced by not only fs- but also ps-laser pulses is demonstrated using time-resolved magneto-optical Faraday imaging. We evidence multi-pulse helicity-dependent laser-induced domain wall motion in all-optical switchable Co/Pt multilayers with a laser energy below the switching threshold. Domain wall displacement of about 2 nm per 2- ps pulse is achieved. By investigating separately the effect of linear and circular polarization, we reveal that laser-induced domain wall motion results from a complex interplay between pinning, temperature gradient and helicity effect. Then, we explore the microscopic origin of the helicity effect acting on the domain wall. These experimental results enhance the understanding of the mechanism of all-optical switching in ultra-thin ferromagnetic films.
arXiv comment8 pages, 4 figures
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Cited by in corpus (16)
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- Unveiling domain wall dynamics of ferrimagnets in thermal magnon currents: competition of angular momentum transfer and entropic torque
- Energy-efficient domain wall motion governed by the interplay of helicity-dependent optical effect and spin-orbit torque
- Domain wall dynamics due to femtosecond laser-induced superdiffusive spin transport
- Thermal Fluctuations In The Landau-Lifshitz-Bloch Model
- Domain-wall motion induced by spin transfer torque delivered by helicity-dependent femtosecond laser
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- Timescales and contribution of heating and helicity effect in helicity-dependent all-optical switching