Room-Temperature van der Waals Perpendicular Ferromagnet Through Interlayer Magnetic Coupling

Abstract

High-density spintronic applications such as digital memory require strong perpendicular magnetic anisotropy (PMA), to maintain data stability above room temperature, which so far has been beyond the reach of stacked van der Waals ferromagnets. Here the authors demonstrate that the interlayer exchange coupling in a magnetic multilayer can effectively tune the Curie temperature and PMA of sandwiched two-dimensional (2D) Fe${}_{3}$GeTe${}_{2}$. The successful realization of room-temperature 2D ferromagnets bearing fully nonvolatile out-of-plane spin information could bring 2D spintronic applications to reality.