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All-Electrical 9-Bit Skyrmion-Based Racetrack Memory Designed with Laser Irradiation
Bin He1,2, Riccardo Tomasello3, Xuming Luo1,2
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
Nano Letters
|October 11, 2023
Summary
This study demonstrates a 9-bit magnetic skyrmion racetrack memory with all-electrical control. Laser-induced magnetic anisotropy enables reliable skyrmion generation, storage, and detection for advanced data storage.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Magnetic skyrmions offer potential for high-density data storage in racetrack memory devices.
- Challenges remain in deterministic skyrmion generation, transfer, and reliable electrical readout.
Purpose of the Study:
- To demonstrate a proof-of-concept 9-bit skyrmion racetrack memory with all-electrical control.
- To address key challenges in skyrmion manipulation and detection for practical applications.
Main Methods:
- Utilized laser irradiation to create tailored nonuniform magnetic anisotropy.
- Implemented laser-induced anisotropy to define skyrmion nucleation centers and memory cells.
- Employed anomalous Hall resistance measurements for skyrmion detection.
Main Results:
- Achieved the first all-electrical controllable 9-bit skyrmion racetrack memory.
- Demonstrated robust control over skyrmion nucleation and positioning.
- Improved signal-to-noise ratio for electrical skyrmion detection.
Conclusions:
- The developed strategy unifies previous findings for robust skyrmion racetrack memory control.
- This work paves the way for a new generation of racetrack memories with reliable skyrmion manipulation and detection.
