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Current-Controlled Topological Magnetic Transformations in a Nanostructured Kagome Magnet
Wensen Wei1, Jin Tang1, Yaodong Wu1,2
1Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Anhui, Chinese Academy of Sciences, Hefei, 230031, China.
Advanced Materials (Deerfield Beach, Fla.)
|July 5, 2021
Summary
Researchers demonstrated room-temperature control of topological magnetic charge in Fe3Sn2 using electrical currents. This enables switching between skyrmions and stripe/bubble phases, paving the way for advanced spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Topological magnetic charge (Q) governs magnetic domain properties and electromagnetic behavior.
- Electrical control of Q is crucial for developing next-generation spintronic devices.
Purpose of the Study:
- To investigate room-temperature current-controlled topological magnetic transformations in a kagome crystal.
- To achieve controlled switching between different topological magnetic states (skyrmions, stripes, bubbles).
Main Methods:
- Utilized nanosecond pulsed currents of approximately 10^10 A m^-2 to induce transformations.
- Employed numerical simulations to understand the underlying physical mechanisms.
Main Results:
- Achieved reproducible and reversible transformations between Q = -1 skyrmions and Q = 0 stripes or type-II bubbles in Fe3Sn2 at room temperature.
- Demonstrated that spin-transfer torque and Joule heating effects are key drivers of these current-induced transformations.
Conclusions:
- Room-temperature electrical switching of topological magnetic charge is feasible in Fe3Sn2.
- The findings offer a pathway for flexible manipulation of electromagnetic properties in spintronic applications.
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