▎ 摘　　要

We report electron paramagnetic resonance (EPR) evidence of the antiferromagnetic ordering in pristine single-layer graphene. Temperature dependences of the parameters of EPR spectra obtained for vacuum-processed samples were studied within the temperature range of 4.2-300 K. Our experiment has confirmed recent theoretical predictions that in single-layer graphene the carrier-mediated exchange interaction leads to antiferromagnetic coupling. We note some quantitative discrepancies between the theory and experimental findings and discuss their origins. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim