Sub-THz High Spin Precession Frequency in van der Waals Ferromagnet Fe<sub>3</sub>GaTe<sub>2</sub>.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39311398.
- Also identified by DOI 10.1021/acs.nanolett.4c03291.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The 2D magnet Fe<sub>3</sub>GaTe<sub>2</sub> has received considerable attention for its high Curie temperature (<i>T</i><sub>C</sub>), robust intrinsic ferromagnetism, and significant perpendicular magnetic anisotropy (PMA). In this study, the dynamic magnetic properties of Fe<sub>3</sub>GaTe<sub>2</sub> are systematically investigated using an all-optical pump-probe technique. We find that the spin precession frequency (<i>f</i>) is as high as 351.2 GHz at <i>T</i> = 10 K under a field of <i>H</i> = 70 kOe. However, it decreases to 242.8 GHz at 300 K, mainly due to the reduced effective PMA field (<i>H</i><sub>keff</sub>). The Gilbert damping factor (α) is modest, which increases from 0.039 (10 K) to 0.075 (300 K) owing to the enhanced scattering rate. Interestingly, when Fe<sub>3</sub>GaTe<sub>2</sub> is coupled with 2 nm of Co, the <i>H</i><sub>keff</sub>, <i>f</i>, and α just decrease slightly, highlighting the dominant influence of Fe<sub>3</sub>GaTe<sub>2</sub>. These findings substantially deepen our understanding of Fe<sub>3</sub>GaTe<sub>2</sub>, promoting the development of spintronic devices based on advanced 2D magnetic materials.