  Two-dimensional (2D) Van der Waals ferromagnets carry the promise of
ultimately miniature spintronics and information storage devices. Among the
newly discovered 2D ferromagnets all inherit the magnetic ordering from their
bulk ancestors. Here we report a new 2D ferromagnetic semiconductor at room
temperature, 2H phase vanadium diselenide (VSe2) which show ferromagnetic at 2D
form only. This unique 2D ferromagnetic semiconductor manifests an enhanced
magnetic ordering owing to structural anisotropy at 2D limit.
