Spin-injection properties from mesoscopic Co electrodes to single-walled carbon nanotube

We have studied the spin-dependent transport properties of single-walled carbon nanotubes having the mesoscopic ferromagnetic Co electrodes. The resistances of Co contacted single-walled nanotubes with the voltage probe length of View the MathML source change hysteretically as a function of the magnetic field, with the magnetoresistance change of 3.4% at low temperatures, exhibiting the spin-polarized electron transport. The estimated spin-flip scattering length was about View the MathML source at View the MathML source.