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Magnetically Switchable Ferroelastic Phase Transition in Two-Dimensional Multiferroics
Xu Wang1, Yangyang Feng1, Kaiying Dou1
1School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|February 4, 2026
Summary
Researchers discovered magnetically switchable ferroelasticity in 2D antiferromagnetic multiferroics. This breakthrough links magnetization changes to ferroelastic polarization switching, paving the way for novel device applications.
Area of Science:
- Condensed matter physics
- Materials science
- Multiferroics research
Background:
- Multiferroic coupling is crucial for fundamental science and devices.
- Magnetoelectric effects are well-studied, but controlling ferroelastic coupling remains a challenge.
Purpose of the Study:
- To report and investigate magnetically switchable ferroelasticity.
- To explore the underlying physics of spin-lattice coupling in 2D multiferroics.
- To demonstrate magnetic control over ferroelastic order.
Main Methods:
- Theoretical investigation of spin-lattice coupling.
- First-principles calculations.
- Analysis of 2D antiferromagnetic multiferroic lattices.
Main Results:
- Demonstrated magnetically switchable ferroelasticity in a 2D antiferromagnetic multiferroic lattice.
- Identified spin-lattice coupling via zigzag antiferromagnetic exchange as the key mechanism.
- Observed robust magnetic control of ferroelastic polarization through 120° ferroelasticity.
- Validated the effect in multiferroic monolayer FePS3.
Conclusions:
- The study reveals a novel pathway for magnetically controlling ferroelastic order.
- Findings open new avenues for designing multiferroic materials with tunable properties.
- This work advances the understanding of multiferroic coupling beyond magnetoelectric effects.
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