Related Experiment Video
Updated: Jan 9, 2026
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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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Room Temperature Control of Axial and Basal Antiferromagnetic Anisotropies Using Strain
Jack Harrison1,2, Junxiong Hu3,4, Charles Godfrey1
1Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, U.K.
ACS Nano
|December 10, 2025
Summary
Strain engineering offers robust control over antiferromagnetic materials like α-Fe2O3. This research demonstrates precise manipulation of nanoscale domains and anisotropies for advanced spintronics and magnonics.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Antiferromagnetic materials are key for ultrafast spintronics and magnonics due to unique magnetic properties.
- Controlling antiferromagnetic order in thin films is challenging due to multidomain states and competing interactions.
- Engineering anisotropy is crucial for effective implementation of antiferromagnetic materials.
Purpose of the Study:
- To demonstrate strain-based control over antiferromagnetic anisotropies and nanoscale domains in α-Fe2O3.
- To investigate the interplay between magneto-crystalline and magneto-elastic interactions under strain.
- To explore the preservation of topological spin textures during strain-induced alignment.
Main Methods:
- Applying isotropic and anisotropic in-plane strains to α-Fe2O3 thin films across a temperature-strain phase space.
- Utilizing linear dichroic scanning transmission X-ray microscopy with in situ strain and temperature control.
- Employing Landau model and micromagnetic simulations to analyze magnetic energy landscapes.
Main Results:
- Achieved robust, strain-driven control over multiple antiferromagnetic anisotropies and nanoscale domains at room temperature.
- Observed strain-induced alignment of the antiferromagnetic state while preserving topological spin textures (merons, antimerons, bimerons).
- Demonstrated that strain effectively reshapes the magnetic energy landscape.
Conclusions:
- Strain engineering provides a versatile mechanism for controlling antiferromagnetic states in α-Fe2O3.
- This control can be applied on demand to reconfigure equilibrium or dynamic states.
- Findings pave the way for next-generation spintronic and magnonic devices utilizing antiferromagnetic materials.
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