Manifestation of high-temperature ferromagnetism in fluorinated graphitic carbon nitride nanosheets

Abstract

Two-dimensional ferromagnetic metal-free materials possessing only an s/p electronic configuration with weak spin–orbit coupling and a large spin relaxation time play a crucial role in constructing future spintronic devices. Here, we demonstrate a novel two-dimensional material, fluorinated graphitic carbon nitride (g-C₃N₄) nanosheets, with intrinsic ferromagnetism; its Curie temperature can reach as high as 700 K. More surprising is that such unusual ferromagnetism can be further tuned by changing the concentration of fluorine. The tuneable electronic spin polarization, as well as the ferromagnetism observed in the fluorinated g-C₃N₄ nanosheets is quite promising for future device applications in spintronics.