Laser-Induced Skyrmion Writing and Erasing in an Ultrafast Cryo-Lorentz Transmission Electron Microscope
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 spatiotemporal 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-μ s to μ s range, depending on the cooling rate of the system.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2018
- DOI:
- 10.1103/PhysRevLett.120.117201
- arXiv:
- arXiv:1709.00495
- Bibcode:
- 2018PhRvL.120k7201B
- Keywords:
-
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- Phys. Rev. Lett. 120, 117201 (2018)