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Updated: Dec 23, 2025
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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
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Tunable Room-Temperature Ferromagnetism in Two-Dimensional Cr2Te3
Yao Wen1, Zhehong Liu2, Yu Zhang1
1School of Physics and Technology, Wuhan University, Wuhan 430072, China.
Nano Letters
|April 28, 2020
Summary
Researchers synthesized 1 and 2 unit cell (UC) chromium telluride (Cr2Te3), achieving room-temperature ferromagnetism. This breakthrough in two-dimensional (2D) materials offers new possibilities for spintronic devices and data storage.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Magnetism manipulation is key for data storage and spintronics.
- Previous methods include electrical control, pressure tuning, and stacking.
- Decreasing dimensions typically lowers ferromagnetism transition temperature (Tc).
Purpose of the Study:
- To synthesize ultrathin chromium telluride (Cr2Te3).
- To investigate room-temperature ferromagnetism in 2D Cr2Te3.
- To understand the thickness dependence of ferromagnetism in Cr2Te3.
Main Methods:
- Synthesis of 1 and 2 unit cell (UC) Cr2Te3.
- Measurement of magnetization.
- Anomalous Hall effect measurements.
- Theoretical modeling.
Main Results:
- Achieved synthesis of 1 and 2 UC Cr2Te3.
- Observed room-temperature ferromagnetism in 2D Cr2Te3.
- Ferromagnetism transition temperature (Tc) increased from 160 K (40.3 nm) to 280 K (7.1 nm).
- Confirmed spontaneous magnetization at room temperature via measurements.
- Theoretical model explained anomalous thickness-dependent Tc.
Conclusions:
- Room-temperature ferromagnetism realized in ultrathin Cr2Te3.
- Anomalous thickness dependence of Tc observed and explained by reconstruction.
- Dimension tuning of ferromagnetism is a viable strategy for spintronic applications.
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