  The discovery of magnetism in van der Waals (vdW) materials has established
unique building blocks for the research of emergent spintronic phenomena. In
particular, owing to their intrinsically clean surface without dangling bonds,
the vdW magnets hold the potential to construct a superior interface that
allows for efficient electrical manipulation of magnetism. Despite several
attempts in this direction, it usually requires a cryogenic condition and the
assistance of external magnetic fields, which is detrimental to the real
application. Here, we fabricate heterostructures based on Fe3GaTe2 flakes that
possess room-temperature ferromagnetism with excellent perpendicular magnetic
anisotropy. The current-driven non-reciprocal modulation of coercive fields
reveals a high spin-torque efficiency in the Fe3GaTe2/Pt heterostructures,
which further leads to a full magnetization switching by current. Moreover, we
demonstrate the field-free magnetization switching resulting from out-of-plane
polarized spin currents by asymmetric geometry design. Our work could expedite
the development of efficient vdW spintronic logic, memory and neuromorphic
computing devices.
