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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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Ferroelectrically tunable magnetic skyrmions in two-dimensional multiferroics.
Zhonglin He1, Wenhui Du1, Kaiying Dou1
1School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandanan Street 27, Jinan 250100, China. daiy60@sina.com.
Materials Horizons
|June 22, 2023
Summary
Researchers discovered novel topological magnetism in two-dimensional multiferroics, enabling the creation of small magnetic skyrmions. Their chirality is tunable via ferroelectricity, paving the way for advanced spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Magnetic skyrmions are topologically protected structures crucial for advanced information technologies.
- Controlling skyrmion properties remains a key challenge for developing practical skyrmionic devices.
Purpose of the Study:
- To identify novel two-dimensional (2D) multiferroic materials for skyrmion stabilization.
- To investigate the ferroelectric control of magnetic skyrmion properties and their dynamics.
Main Methods:
- First-principles calculations.
- Monte Carlo simulations.
- Analysis of magnetoelectric coupling effects.
Main Results:
- Identified nontrivial topological magnetism in 2D multiferroic Co2NF2.
- Stabilized sub-10 nm magnetic skyrmions using large Dzyaloshinskii-Moriya and exchange interactions.
- Demonstrated ferroelectric tunability of skyrmion chirality and controllable skyrmion creation/annihilation via interfacing with MoSe2.
Conclusions:
- Monolayer Co2NF2 is a promising material for 2D skyrmionics due to its large Dzyaloshinskii-Moriya interaction and ferroelectric tunability.
- Magnetoelectric coupling offers a pathway for precise control of skyrmion states and transitions.
- A new criterion (κ') is proposed for stabilizing magnetic skyrmions in multiferroic lattices, advancing the field of 2D skyrmionics and multiferroics.
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