Laser-Induced Skyrmion Writing and Erasing in an Ultrafast Cryo-Lorentz Transmission Electron Microscopy

Abstract

We demonstrate that light-induced heat pulses of different duration and energy can write skyrmions in a broad range of temperatures and magnetic field in FeGe. Using a combination of camera-rate and pump-probe cryo-Lorentz Transmission Electron Microscopy, we directly resolve the spatio-temporal evolution of the magnetization ensuing optical excitation. The skyrmion lattice was found to maintain its structural properties during the laser-induced demagnetization, and its recovery to the initial state happened in the sub-μs to μs range, depending on the cooling rate of the system.

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• In situ Electric Field Skyrmion Creation in Magnetoelectric Cu${}_2$OSeO${}_3$
• Ultrafast generation and dynamics of isolated skyrmions in antiferromagnetic insulators
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• Skyrmion-Skyrmion Interaction in a Magnetic Film
• Atomic-resolution cryo-STEM across continuously variable temperature
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• Writing Skyrmions with a Magnetic Dipole
• Ultrafast Electron Microscopy of Nanoscale Charge Dynamics in Semiconductors
• Optically driven collective spin excitations and magnetization dynamics in the Néel-type skyrmion host GaV${}_4$S${}_8$
• Helicity-independent all-optical switching of magnetization in ferrimagnetic alloys
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• Microscopic Theory of Ultrafast Skyrmion Excitation by Light
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• Spin Resonance Spectroscopy with an Electron Microscope
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• Photocontrol of spin scalar chirality in centrosymmetric itinerant magnets
• Ultrasensitive Sub-monolayer Palladium Induced Chirality Switching and Topological Evolution of Skyrmions
• Surface pinning and triggered unwinding of skyrmions in a cubic chiral magnet
• Electron Imaging of Nanoscale Charge Distributions Induced by Femtosecond Light Pulses
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• Dynamic control of ferroic domain patterns by thermal quenching
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