The study investigates the magnetic properties of van der Waals (vdW) Fe3GaTe2 nanoflakes, ranging from bulk to monolayer thickness. The researchers found that Fe3GaTe2 exhibits intrinsic 2D ferromagnetism, with a record-high Curie temperature (Tc) of 240 K for monolayer samples. Key findings include: 1. **Magnetic Properties of Fe3GaTe2 Single Crystal**: The bulk Fe3GaTe2 crystal shows hard ferromagnetism with a Curie temperature of about 340 K. It exhibits perpendicular magnetic anisotropy (PMA) along the c-axis. 2. **Characterization of Fe3GaTe2 Nanoflakes**: Atomically thin Fe3GaTe2 nanoflakes were prepared using an Al2O3-assisted exfoliation technique. These nanoflakes exhibit robust PMA, as evidenced by square-shaped hysteresis loops and negative magnetoresistance (NMR) behavior under out-of-plane magnetic fields. 3. **Anomalous Hall Effect (AHE)**: The AHE in Fe3GaTe2 nanoflakes is dominated by the Berry curvature of electronic bands, as confirmed by scaling analysis. The intrinsic AHE is significant at low temperatures, with a linear relationship between longitudinal resistance and Hall resistance. 4. **Thickness-Dependent Ferromagnetism**: The Curie temperature decreases monotonically as the samples are thinned, but the monolayer sample maintains a high Tc of 240 K. This suggests that the intrinsic mechanism of AHE is dominant at low temperatures. 5. **Discussion**: The study highlights Fe3GaTe2 as a promising material for next-generation spintronic applications due to its high Tc and robust PMA. The findings also provide insights into the physical mechanisms of 2D ferromagnetism. This research advances the understanding of 2D ferromagnetism and opens new avenues for exploring spintronic devices.The study investigates the magnetic properties of van der Waals (vdW) Fe3GaTe2 nanoflakes, ranging from bulk to monolayer thickness. The researchers found that Fe3GaTe2 exhibits intrinsic 2D ferromagnetism, with a record-high Curie temperature (Tc) of 240 K for monolayer samples. Key findings include: 1. **Magnetic Properties of Fe3GaTe2 Single Crystal**: The bulk Fe3GaTe2 crystal shows hard ferromagnetism with a Curie temperature of about 340 K. It exhibits perpendicular magnetic anisotropy (PMA) along the c-axis. 2. **Characterization of Fe3GaTe2 Nanoflakes**: Atomically thin Fe3GaTe2 nanoflakes were prepared using an Al2O3-assisted exfoliation technique. These nanoflakes exhibit robust PMA, as evidenced by square-shaped hysteresis loops and negative magnetoresistance (NMR) behavior under out-of-plane magnetic fields. 3. **Anomalous Hall Effect (AHE)**: The AHE in Fe3GaTe2 nanoflakes is dominated by the Berry curvature of electronic bands, as confirmed by scaling analysis. The intrinsic AHE is significant at low temperatures, with a linear relationship between longitudinal resistance and Hall resistance. 4. **Thickness-Dependent Ferromagnetism**: The Curie temperature decreases monotonically as the samples are thinned, but the monolayer sample maintains a high Tc of 240 K. This suggests that the intrinsic mechanism of AHE is dominant at low temperatures. 5. **Discussion**: The study highlights Fe3GaTe2 as a promising material for next-generation spintronic applications due to its high Tc and robust PMA. The findings also provide insights into the physical mechanisms of 2D ferromagnetism. This research advances the understanding of 2D ferromagnetism and opens new avenues for exploring spintronic devices.