Reversible Transformation between Isolated Skyrmions and Bimerons
Kentaro Ohara1, Xichao Zhang1, Yinling Chen1
1Department of Electrical and Computer Engineering, Shinshu University, 4-17-1 Wakasato, Nagano380-8553, Japan.
Nano Letters
|October 19, 2022
Summary
Researchers created and reversibly transformed skyrmions into bimerons using electric currents and temperature. This breakthrough enables using different topological spin textures for advanced computing devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Skyrmions and bimerons are topological spin textures crucial for advanced computing.
- Transforming between these states is essential for computing architectures using diverse topological bits.
Purpose of the Study:
- To demonstrate the creation of isolated skyrmions and their transformation into bimerons.
- To investigate the reversibility and control mechanisms of skyrmion-bimeron transformations.
- To explore potential applications in information processing.
Main Methods:
- Utilized electric current-induced Oersted fields for spin texture manipulation.
- Employed temperature-induced perpendicular magnetic anisotropy variations.
- Observed intermediate states like deformed skyrmion bubbles and chiral labyrinth domains.
Main Results:
- Successfully created isolated skyrmions and transformed them into bimerons.
- Demonstrated reversible skyrmion-bimeron transformation controlled by current amplitude and scanning direction.
- Achieved creation of both skyrmions and bimerons within the same system via transformation and magnetization switching.
Conclusions:
- The study presents a novel method for interconverting topological spin textures (skyrmions and bimerons).
- This reversible transformation, controlled by electrical and thermal stimuli, offers a pathway for advanced information processing.
- The findings pave the way for developing devices that utilize multiple topological spin textures simultaneously.
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