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Skyrmion Creation and Manipulation by Nano-Second Current Pulses
1School of Microelectrics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China.
Scientific Reports
|March 4, 2016
Summary
Stable skyrmions for data storage are created and manipulated using only nano-second current pulses. This method enables efficient skyrmion generation and control in spintronic devices without external fields.
Area of Science:
- Spintronics
- Materials Science
- Condensed Matter Physics
Background:
- Skyrmions are topologically protected spin textures with potential applications in data storage and processing.
- Efficient creation and manipulation of skyrmions are crucial for developing practical skyrmion-based devices.
Purpose of the Study:
- To demonstrate a method for creating and manipulating skyrmions using only current pulses.
- To investigate the behavior of magnetic domains under current pulses in a spin valve structure.
Main Methods:
- Utilized nano-second current pulses to induce magnetic domain transitions in a spin valve.
- Investigated spin valves with perpendicularly magnetized free layers and broken chiral symmetry.
- Examined the effect of current polarity and density on domain structures and skyrmion formation.
Main Results:
- Nano-second current pulses alone can create, delete, and manipulate skyrmions.
- Observed transitions from single domain to Néel walls and their image inversions in the free layer.
- Achieved stable skyrmion creation using specifically designed current pulses without external fields.
- Demonstrated effective tuning of skyrmion size with current density in a perpendicularly magnetized fixed layer.
Conclusions:
- A current-pulse-only method for efficient skyrmion generation and manipulation has been established.
- This technique offers a pathway for developing advanced spintronic devices for data storage and information processing.
- The findings highlight the potential of controlled current pulses for precise control over magnetic textures.
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