Texture and magnetic anisotropy of carbon nanotubes in cathode deposits obtained by the electric-arc method

The principal values of the diamagnetic susceptibility of nanotubes are found by comparing the texture parameters of carbon multiwalled nanotubes in cathode deposits with their magnetic anisotropy. It is shown that the susceptibility along the nanotubes is essentially identical to the atomic susceptibility of carbon, and the large average diamagnetism of multiwalled nanotubes is due to the susceptibility component normal to the carbon layers, whose value in the temperature range 4-900 K can be completely explained on the basis of the band model of quasi-two-dimensional graphite. (C) 1999 American Institute of Physics. [S0021-3640(99)01019-1].