Cotunneling through a magnetic single-molecule transistor based on   N\atC60
  We present an experimental and theoretical study of a magnetic single-molecule transistor based on N@C60 connected to gold electrodes. Particular attention is paid to the regime of intermediate molecule-lead coupling, where cotunneling effects manifest themselves in the Coulomb-blockade regime. The experimental results for the differential conductance as a function of bias, gate voltage, and external magnetic field are in agreement with our analysis of the tunneling rates and provide evidence of magnetic signatures in single-N@C60 devices arising from an antiferromagnetic exchange interaction between the C60 spin and the nitrogen spin. 
Nicolas Roch, Romain Vincent, Florian Elste, Wolfgang Harneit,   Wolfgang Wernsdorfer, Carsten Timm and Franck Balestro
cond-mat.mes-hall