Ferromagnetism of Mn-N₄ architecture embedded graphene

Abstract

Realization of intrinsic two-dimensional (2D) magnetic materials with high Curie temperature is one of the prevalent research directions in spintronics. Here 2D ferromagnet of Mn-N4 embedded graphene were reported, where the single Mn atoms dispersed structure is confirmed by extended X-ray absorption fine structure (EXAFS) and high-angle annular dark-field scanning transmission electron microscope (HAADF-STEM) results. Magnetic measurements demonstrate that the Mn-N4 embedded graphene exhibits robust room-temperature ferromagnetism and X-ray magnetic circular dichroism (XMCD) results reveal that the magnetic moments come from the embedded single Mn atoms. Furthermore, with the aid of first-principle calculations, we identify that the Mn-N4 architecture is the source of the magnetism and the long-range magnetic ordering is favored in such coordination system

Study on the magnetic and hysteresis behaviors in a bilayer graphene-like ring with edge decorated

“…In recent decade, decorated graphene has attracted a lot of attention from scientists [49][50][51]. For instance, Zhang et al reveal that the magnetic moments of Mn-N-4 embedded graphene come from the Mn atoms by measuring the x-ray magnetic circular dichroism [52]. Additionally, we have successfully investigated magnetic behaviors of nano-graphene bilayer structure [53].…”

Unexpected Room Temperature Ferromagnetism of a Ball-Milled Graphene Oxide—Melamine Mixture

“…At present, quite a lot of publications are devoted to the ferromagnetism of d 0 materials (see, for example, [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]). There are also many works about the ferromagnetism of graphene-like structures [21][22][23][24][25][26][27]. The situation with carbon-based materials seems to us to be very interesting.…”