Quantum mechanics

Anisotropy

Phase (matter)

Metallurgy

Materials science

Ferromagnetism

Selenium

Molecule

Semiconductor

Vanadium

Physics

Optics

Diselenide

van der Waals force

Magnetic semiconductor

Condensed matter physics

Spintronics

Optoelectronics

ACS Nano

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

Ferromagnetism in 2D Vanadium Diselenide