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Ferromagnetism of an all-carbon composite composed of a carbon nanowire inside a single-walled carbon nanotube

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2 Author(s)
Yang, Xiaoping ; National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China, and Department of Physics, Huainan Normal University, Huainan, Anhui 232001, China ; Dong, Jinming

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Using the first-principles spin density functional approach, we have studied magnetism of a type of all-carbon nanomaterials, i.e., the carbon nanowires inserted into the single-walled carbon nanotubes. It is found that if the one-dimensional (1D) carbon nanowire density is not too higher, the ferromagnetic ground state will be more stable than the antiferromagnetic one, which is caused by weak coupling between the 1D carbon nanowire and the single-walled carbon nanotube. Also, both dimerization of the carbon nanowire and carbon vacancy on the tube wall are found to enhance the magnetic moment of the composite.

Published in:

Applied Physics Letters  (Volume:86 ,  Issue: 16 )

Date of Publication:

Apr 2005

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