Magnetic properties of TDAE-C70-toluene

Abstract The magnetic properties of single crystal TDAE-C 70 -toluene are reported in relation to its unique dimerized structure of C 70 molecules in the unit cell. The g -factor at room temperature ( g =2.0052) suggests that the origin of the magnetism is different from C 70 ( g =2.002). The spins on the C 70 molecules are cancelled out due to the dimerization. No magnetic phase transition appears at least down to 0.5 K. The magnetic susceptibility follows the Curie–Weiss law with the Weiss constant of +0.36 K. These results show that the weakly coupled spins on TDAE molecules contribute the magnetism of this salt, which is in contrast to the ferromagnetic TDAE-C 60 where the TDAE spins are cancelled.