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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Multistep skyrmion phase transition driven by light-induced uniaxial strain
Bei Ding1,2, Yadong Wang1,3, Jiahui Meng1
1Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.
Science Advances
|May 14, 2025
Summary
Researchers achieved multistep skyrmion phase transitions using light-induced uniaxial strain up to 1% in multilayers. This strain engineering enables novel skyrmion behavior and potential for advanced spintronic devices.
Area of Science:
- Spintronics
- Materials Science
- Condensed Matter Physics
Background:
- Strain engineering is crucial for spintronic devices utilizing skyrmion-hosting multilayers.
- Conventional strain levels (<0.5%) limit the exploration of unique material properties.
- The anisotropic effects of uniaxial strain on skyrmions remain underexplored.
Purpose of the Study:
- To investigate multistep skyrmion phase transitions induced by substantial uniaxial strain.
- To explore the influence of light-induced strain magnitude and orientation on skyrmion behavior.
- To demonstrate a novel method for controlling skyrmions for spintronic applications.
Main Methods:
- Integration of skyrmion-hosting multilayers with a flexible liquid crystal film.
- Application of light-induced uniaxial strain up to 1%.
- Micromagnetic simulations to understand underlying physical mechanisms.
Main Results:
- Skyrmion transitions are sensitive to strain magnitude and orientation.
- Strain parallel to stripes (<0.6%) induces skyrmions.
- Strain (>0.6%) induces perpendicular elongation (negative Poisson effect) and subsequent reversion to stripes.
- Deformation up to 40% observed at 0.8% strain.
Conclusions:
- Strain-induced anisotropic modulation of Dzyaloshinskii-Moriya interaction drives observed skyrmion phenomena.
- This approach offers a flexible, light-activated method for substantial uniaxial strain control.
- Potential for developing low-power, multistate spintronic devices.
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