Dielectric properties of C-60 molecular complexes

The permittivity epsilon of the molecular complexes (BTX)C60CS2, (DAN)C-60( C6H6)(3), and (S4N4)(1.2)C-60(C6H6)(0.8) has been studied at 100 MHz. A max imum has been observed to appear in the temperature dependence epsilon(T) a t T approximate to 90 K, which can be assigned to freezing of the orientati onal disorder. A region of anomalous growth of epsilon with decreasing temp erature has been found in the low-temperature range T less than or equal to 25 K, this feature being apparently sensitive to the actual packing patter n of C-60 spheres in the molecular complex. (C) 2000 MAIK "Nauka/Interperio dica".