Graphene - a single atomic layer of graphite - is a recently-found two-dimensional form of carbon, which exhibits high crystal quality and ballistic electron transport at room temperature. Soft magnetic NiFe electrodes have been used to inject polarized spins into graphene and a 10% change in resistance has been observed as the electrodes switch from the parallel to the antiparallel state. This coupled with the fact that a field effect electrode can modulate the conductivity of these graphene films makes them exciting potential candidates for spin electronic devices.
@article{arxiv.0704.3165,
title = {Graphene Spin Valve Devices},
author = {E. W. Hill and A. K. Geim and K. Novoselov and F. Schedin and P. Blake},
journal= {arXiv preprint arXiv:0704.3165},
year = {2019}
}