Few-nm tracking of magnetic vortex orbits and their decay with ultrafast Lorentz microscopy
arXiv:1907.04608 · doi:10.1038/s42005-020-0301-y
Abstract
Transmission electron microscopy is one of the most powerful techniques to characterize nanoscale magnetic structures. In light of the importance of fast control schemes of magnetic states, time-resolved microscopy techniques are highly sought after in fundamental and applied research. Here, we implement time-resolved Lorentz imaging in combination with synchronous radio-frequency excitation using an ultrafast transmission electron microscope. As a model system, we examine the current-driven gyration of a vortex core in a 2 m-sized magnetic nanoisland. We record the trajectory of the vortex core for continuous-wave excitation, achieving a localization precision of 2nm with few-minute integration times. Furthermore, by tracking the core position after rapidly switching off the current, we find a temporal hardening of the free oscillation frequency and an increasing orbital decay rate attributed to local disorder in the vortex potential.
References in corpus (21)
- Skyrmion Lattice in a Chiral Magnet
- Spin Transfer Torques
- Current-driven dynamics of chiral ferromagnetic domain walls
- Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
- Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
- Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
- Ultrafast transmission electron microscopy using a laser-driven field emitter: femtosecond resolution with a high coherence electron beam
- Large microwave generation from d.c. driven magnetic vortex oscillators in magnetic tunnel junctions
- Laser-Induced Skyrmion Writing and Erasing in an Ultrafast Cryo-Lorentz Transmission Electron Microscopy
- Time-Resolved X-ray Microscopy of Spin-Torque-Induced Magnetic Vortex Gyration
- Dynamics of Pinned Magnetic Vortices
- Harmonic oscillator model for current- and field-driven magnetic vortices
- Spin-wave interference patterns created by spin-torque nano-oscillators for memory and computation
- A light induced metastable magnetic texture uncovered by in-situ Lorentz microscopy
- Nanoscale mapping of ultrafast magnetization dynamics with femtosecond Lorentz microscopy
- Effects of Disorder and Internal Dynamics on Vortex Wall Propagation
- Enhanced Non-Adiabaticity in Vortex Cores due to the Emergent Hall Effect
- Proposal of a robust measurement scheme for the non-adiabatic spin torque using the displacement of magnetic vortices
- Influence of material defects on current-driven vortex domain wall mobility
- The effect of disorder on transverse domain wall dynamics in magnetic nanostrips
- Effects of disorder on magnetic vortex gyration
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- Second-order topological insulator in breathing square lattice of magnetic vortices
- Observation of a new light-induced skyrmion phase in the Mott insulator Cu2OSeO3
- Laser-induced real-space topology control of spin wave resonances
- Third-order topological insulator in three-dimensional lattice of magnetic vortices
- Far-Field Radiative Thermal Rectification with Bulk Materials
- Realizing Corner States in Artificial Crystals Based on Topological Spin Textures
- Spin Resonance Spectroscopy with an Electron Microscope
- GHz sample excitation at the ALBA-PEEM
- Revealing domain wall stability during ultrafast demagnetization