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Velocity Enhancement by Synchronization of Magnetic Domain Walls
Aleš Hrabec1, Viola Křižáková2, Stefania Pizzini2
1Laboratoire de Physique des Solides, CNRS, Université Paris-Sud, Université Paris-Saclay, 91405 Orsay Cedex, France.
Physical Review Letters
|June 16, 2018
Summary
Engineered magnetic bilayers feature coupled domain walls whose synchronized motion enhances velocity. This coupling, influenced by Dzyaloshinskii-Moriya interaction and flux closure, allows tunable dynamics via magnetic fields.
Area of Science:
- Condensed matter physics
- Materials science
- Spintronics
Background:
- Magnetic domain walls (DWs) exhibit dynamics intrinsically linked to their structure.
- Understanding and controlling DW behavior is crucial for advanced magnetic devices.
Purpose of the Study:
- To investigate the dynamics of coupled magnetic domain walls in engineered bilayers.
- To explore how Dzyaloshinskii-Moriya interaction and flux-closing mechanisms influence coupled DW behavior.
Main Methods:
- Theoretical investigation of magnetic bilayers with coupled domain walls.
- Analysis of the impact of dipolar fields and Dzyaloshinskii-Moriya interaction on DW structure and dynamics.
- Simulation of magnetic-field-induced dynamics in the precessional regime.
Main Results:
- Stabilization of coupled domain wall pairs through cooperative Dzyaloshinskii-Moriya interaction and flux-closing.
- Demonstration of increased domain wall velocity due to coupling compared to single DWs.
- Observation of synchronized motion for flux closure preservation during dynamics.
Conclusions:
- Coupled domain wall systems offer enhanced velocity and tunable dynamics.
- The interplay between Dzyaloshinskii-Moriya interaction, flux closure, and external fields enables control over coupled DW states.
- This engineered approach holds promise for spintronic applications.
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