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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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Pressure-Enhanced Ferromagnetism in Layered CrSiTe3 Flakes
Cheng Zhang1,2, Yue Gu3, Le Wang2
1School of Physics, Harbin Institute of Technology, Harbin 150001, China.
Nano Letters
|September 17, 2021
Summary
Applying external pressure significantly enhances ferromagnetism in chromium silicon telluride (CrSiTe3) flakes. This research reveals a transition to stronger ferromagnetic behavior at higher pressures, paving the way for high-temperature layered magnets.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Layered ferromagnets are crucial for spintronic applications, but their intrinsic ferromagnetic interactions are often weak.
- Understanding and enhancing magnetic properties in these materials is essential for technological advancement.
Purpose of the Study:
- To investigate the effect of external pressure on the ferromagnetic properties of layered chromium silicon telluride (CrSiTe3) flakes.
- To explore the potential for pressure-induced enhancement of ferromagnetism and the transition to high-temperature magnetic ordering.
Main Methods:
- High-pressure magnetic circular dichroism (MCD) measurements were employed to probe magnetic transitions.
- Density Functional Theory (DFT) calculations were used to support experimental findings on exchange interactions.
Main Results:
- CrSiTe3 exhibits a paramagnetic-to-ferromagnetic phase transition around 32 K below 3 GPa, characterized by soft ferromagnetism.
- Above 4 GPa, a transition to hard ferromagnetism occurs, with significantly increased Curie temperature (up to 138 K at 7.8 GPa) and coercivity (up to 0.17 T).
- Pressure dramatically influences exchange interactions, leading to enhanced magnetic coupling.
Conclusions:
- External pressure is a powerful tool for tuning and enhancing ferromagnetism in layered materials like CrSiTe3.
- The observed pressure-induced strengthening of magnetic interactions opens new avenues for developing high-temperature layered ferromagnets.
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