Probing Electron Spin Resonance in Monolayer Graphene
  The precise value of the $g$-factor in graphene is of fundamental interest for all spin-related properties and their application. We investigate monolayer graphene on a Si/SiO2 substrate by resistively detected electron spin resonance (ESR). Surprisingly, the magnetic moment and corresponding g-factor of 1.952+/-0.002 is insensitive to charge carrier type, concentration, and mobility. 
Timothy J. Lyon, Jonas Sichau, August Dorn, Alba Centeno, Amaia   Pesquera, Amaia Zurutuza, and Robert H. Blick
cond-mat.mtrl-sci cond-mat.mes-hall