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

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

2007-07-16

arxiv.org/abs/0707.2386v2

Applied Physics Letters 86, 163105 (2005)

Physics

Condensed Matter

Materials Science

3 figures

Scientific paper

10.1063/1.1899769

Using the first-principles spin density functional approach, we have studied magnetism of a new type of all-carbon nanomaterials, i.e., the carbon nanowires inserted into the single-walled carbon nanotubes. It is found that if the 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.

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