Giant Magnetoresistance of Nickel-contacted Carbon Nanotubes

S. Athanasopoulos, S.W. Bailey, J. Ferrer, V.M. Garcia Suarez, C.J. Lambert, A.R. Rocha, and S. Sanvito

We present ab initio theoretical results for the giant magnetoresistance of single-wall carbon nanotubes (CNT) in contact with nickel electrodes. These show that Ni atoms located on the surface or axis of CNT contacts can induce a significant magnetic moment on the carbon atoms. For non-gated, undoped CNTs, this produces room-temperature GMR ratios of between 45% and 100% of the anti-aligned conductance.