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Position-reconfigurable pinning for magnetic domain wall motion
Taekhyeon Lee1, Seyeop Jeong2, Sanghoon Kim2
1Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
Scientific Reports
|April 26, 2023
Summary
Researchers developed a novel, reconfigurable magnetic domain wall (DW) pinning method using dipolar interactions between DWs in different layers. This breakthrough allows dynamic control of DW position, enhancing spintronic device functionality.
Area of Science:
- Spintronics
- Condensed Matter Physics
- Materials Science
Background:
- Precise control of magnetic domain wall (DW) motion is essential for spintronic devices.
- Current DW pinning methods, like notch structures, lack reconfigurability after fabrication.
Purpose of the Study:
- To propose and demonstrate a novel method for reconfigurable DW pinning.
- To leverage dipolar interactions between DWs in different magnetic layers for dynamic pinning control.
Main Methods:
- Utilizing dipolar interactions between two DWs in separate magnetic layers.
- Experimentally demonstrating current-driven DW motion with reconfigurable pinning.
Main Results:
- Observed repulsion between DWs in different layers, with one DW acting as a pinning barrier for the other.
- Successfully modulated the pinning position by exploiting the mobility of the DW.
- Demonstrated experimentally reconfigurable pinning for current-driven DW motion.
Conclusions:
- The proposed method offers reconfigurable DW pinning, overcoming limitations of fixed pinning sites.
- This approach enhances controllability of DW motion, potentially expanding spintronic device applications.
- Dipolar interactions between DWs present a new avenue for advanced spintronic device design.
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