Above room-temperature ferromagnetism in van der Waals material Fe3GaTe2*

The emergence of two-dimensional van der Waals magnets has introduced new prospects for vdW heterostructure and spintronic applications in the past decade. Recently a new member Fe3GaTe2 was found and stood out for its persistent ferromagnetism above room temperature. In this presentation, we will discuss our successful synthesis of single-crystalline Fe3GaTe2, as well as the following bulk characterization, transport, and magneto-optical measurements performed on our single crystal and exfoliated thin flakes. The magnetization and transport studies on the bulk Fe3GaTe2 crystals reveal a high Curie temperature of 355K and the thermodynamic investigations suggest the presence of a strong electron-electron correlation. Layer-dependent magneto-optical studies on thin Fe3GaTe2 flakes further unveil its robust ferromagnetism for room-temperature applications in 2D limits. Our work illuminates the remarkable magnetic properties of Fe3GaTe2, establishing it as a suitable vdW platform for realizing controllable 2D magnetism and spintronic applications in everyday environments.