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A reporter from Science and Technology Daily learned from the University of Science and Technology of China that the research group of Professor Yan Wensheng of the National Synchrotron Radiation Laboratory of the university and associate researcher Sun Zhihu have realized the room temperature ferromagnetism of two-dimensional graphene through the strategy of precise and controllable doping of magnetic metal atoms
.
The research results have been published in "Nature·Communication" a few days ago
.
? Graphene is considered to be a promising material in the next generation of spintronics applications due to its excellent properties such as high carrier mobility, long spin diffusion length, and weak spin-orbit coupling
.
How to induce stable room temperature ferromagnetism in intrinsically diamagnetic graphene is one of the primary problems facing the preparation of graphene-based spintronic devices
.
Based on previous research experience of magnetic regulation of two-dimensional transition metal chalcogenides and DFT material simulation design, researchers believe that precise and controllable doping of magnetic transition metals (iron, cobalt, nickel, etc.
) is an effective solution to this problem
.
In order to overcome the huge barrier of embedding transition metal atoms into the graphene lattice, the research team used nitrogen atoms to construct anchor points, which firmly bound the cobalt atoms in the graphene lattice, thereby providing a stable local magnetic moment and passing The orbital hybridization between cobalt-nitrogen-carbon forms a ferromagnetic exchange effect, and finally realizes the room temperature ferromagnetism of graphene
.
.
The research results have been published in "Nature·Communication" a few days ago
.
? Graphene is considered to be a promising material in the next generation of spintronics applications due to its excellent properties such as high carrier mobility, long spin diffusion length, and weak spin-orbit coupling
.
How to induce stable room temperature ferromagnetism in intrinsically diamagnetic graphene is one of the primary problems facing the preparation of graphene-based spintronic devices
.
Based on previous research experience of magnetic regulation of two-dimensional transition metal chalcogenides and DFT material simulation design, researchers believe that precise and controllable doping of magnetic transition metals (iron, cobalt, nickel, etc.
) is an effective solution to this problem
.
In order to overcome the huge barrier of embedding transition metal atoms into the graphene lattice, the research team used nitrogen atoms to construct anchor points, which firmly bound the cobalt atoms in the graphene lattice, thereby providing a stable local magnetic moment and passing The orbital hybridization between cobalt-nitrogen-carbon forms a ferromagnetic exchange effect, and finally realizes the room temperature ferromagnetism of graphene
.