Structural, Magnetic, and Electronic Properties of the Monometallofullerene Gd@C_82 : Theory

Abstract

The structural, electronic, and magnetic properties of Gd@C 82 endohedral metallofullerene have been studied by employing on-site correlation corrected, scalar-relativistic and full-relativistic density functional theory within the local density and generalized gradient approximations. The experimentally observed reduction of the magnetic moment of Gd@C 82 with respect to that of a free Gd +3 ion can be explained by a tiny hybridization between unoccupied Gd-4f states and carbonπ states, resulting in a generic antiferromagnetic coupling of the Gd-4f spin with the remaining unpaired spin in the hybridized molecular orbital.