Magnetic properties of the fullerene-based molecular complexes in strong magnetic field

Investigations of the temperature dependencies of the magnetic susceptibili ty in a temperature range 4.2K < T < 300 K and the field dependence of the magnetisation M(B) in fields up to B = 50 T show that the magnetic properti es of the C-60 molecular complexes and pure C-60 cannot be described on the basis of the standard model, which assumes that the paramagnetic oxygen im purity makes the dominant contribution. We will suggest that the magnetism in these solids originates from the diamagnetic C-60 molecules and possibly , the paramagnetism originates from C-60(-) complexes which are characteris ed by an anomalously low g-factor /g/ similar to 0.14. (C) 2001 Elsevier Sc ience B.V. All rights reserved.