FM characeteristic is almost suppressed at x = 0.68 and spin glass state appears. As the doping level increases, TC decreases, whereas Hc increases up to 7 kOe at x = 0.12, which is the highest Hc¬ reported so far. Introduction of Ni dopant with x = 0.03 can enhance the value of Hc up to ~200% while maintaining FM state at room temperature. Here, the coercive field (Hc) is substantially enhanced by substituting Ni for Fe in (Fe1-xNix)3GaTe2 crystals. As substitutional doping changes the magnetic properties of vdW magnets, it can be a powerful means of engineering properties of magnetic materials. Recently, an intrinsic FM material Fe3GaTe2 with high TC (350-380 K) has been reported. ![]() ![]() FexGeTe2 (x = 3, 4, 5) systems, two-dimensional (2D) van der Waals (vdW) ferromagnet (FM) metals with high Curie temperature (TC), have been intensively studied to realize all-2D spintronic devices.
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