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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Propelling ferrimagnetic domain walls by dynamical frustration
Dennis Hardt1, Reza Doostani2, Sebastian Diehl2
1Institute for Theoretical Physics, University of Cologne, Cologne, Germany. hardt@thp.uni-koeln.de.
Nature Communications
|April 23, 2025
Summary
Domain walls in a driven ferrimagnet spontaneously move, acting like self-propelling units. This active motion, driven by dynamical frustration, leads to rapid correlation length growth and noise resilience, unlike equilibrium systems.
Area of Science:
- Condensed Matter Physics
- Active Matter Physics
Background:
- Driven many-particle systems can exhibit non-equilibrium properties.
- Ferrimagnets in oscillating magnetic fields present a unique system for studying driven dynamics.
Purpose of the Study:
- Investigate the behavior of domain walls in a ferrimagnet under a weak oscillating magnetic field.
- Characterize the emergence of active motion and its consequences for magnetic properties.
Main Methods:
- Theoretical study of a driven ferrimagnetic model.
- Analysis of domain wall dynamics arising from spontaneous symmetry breaking and dynamical frustration.
Main Results:
- Domain walls exhibit active, self-propelling motion.
- Active motion leads to linear growth of magnetic correlation length, exceeding equilibrium rates.
- Dynamical frustration enhances system resilience to noise.
Conclusions:
- Driven ferrimagnets can display active matter-like behavior.
- Active domain wall motion is a novel mechanism for rapid correlation development in non-equilibrium systems.
- The system's robustness to noise opens possibilities for novel magnetic phenomena.
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