Related Experiment Video
Updated: Jun 12, 2025
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.1K
Sub-THz High Spin Precession Frequency in van der Waals Ferromagnet Fe3GaTe2
Jiali Zhang1, Zhou Wang2,3, Ziyang Li1
1Key Laboratory of Micro and Nano Photonic Structures (MOE), School of Information Science and Technology, Fudan University, Shanghai 200433, China.
Nano Letters
|September 23, 2024
Summary
Fe3GaTe2, a 2D magnetic material, exhibits high spin precession frequencies and modest damping. Its dynamic magnetic properties are largely retained even when coupled with cobalt, indicating potential for spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Two-dimensional (2D) magnetic materials are crucial for next-generation spintronic devices.
- Fe3GaTe2 is a promising 2D magnet known for its high Curie temperature, ferromagnetism, and perpendicular magnetic anisotropy (PMA).
Purpose of the Study:
- To systematically investigate the dynamic magnetic properties of Fe3GaTe2.
- To understand the influence of temperature and cobalt coupling on these properties.
Main Methods:
- Utilized an all-optical pump-probe technique to study dynamic magnetic properties.
- Measured spin precession frequency (f), effective PMA field (Hkeff), and Gilbert damping factor (α) at various temperatures and magnetic fields.
- Investigated the effect of coupling Fe3GaTe2 with a thin layer of cobalt.
Main Results:
- Observed high spin precession frequencies (f) up to 351.2 GHz at 10 K and 70 kOe.
- Found that f decreases with increasing temperature (242.8 GHz at 300 K) due to reduced Hkeff.
- Reported a modest Gilbert damping factor (α) that increases with temperature (0.039 at 10 K to 0.075 at 300 K).
- Demonstrated that coupling with 2 nm of cobalt only slightly affects Hkeff, f, and α, underscoring the dominance of Fe3GaTe2.
Conclusions:
- The dynamic magnetic properties of Fe3GaTe2 are strongly influenced by its effective PMA field, which is temperature-dependent.
- Fe3GaTe2 maintains its significant dynamic magnetic characteristics even when interfaced with cobalt.
- These findings enhance the understanding of Fe3GaTe2 and support its application in advanced 2D spintronic devices.
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