  Layered van der Waals (vdW) crystals with intrinsic magnetic properties such
as high Curie temperature (TC) and large perpendicular magnetic anisotropy
(PMA) are key to the development and application of spintronic devices. The
ferromagnetic vdW metal Fe3-xGeTe2 (FGT) has gained prominence recently due to
its high TC (220 K) and strong PMA. Here, we introduce a new metallic vdW
ferromagnets, Fe5-xGe2Te2 or FG2T, which was successfully synthesized and fully
characterized. FG2T is a metal that orders ferromagnetically with a very sharp
transition at 250 K (bulk and single crystal thin flakes) and shows large PMA,
as found by both experimental and computational studies. This work enables
novel heterostructure devices with near room temperature capabilities by using
FG2T as spin injector.
