THERMODYNAMIC PROPERTIES OF MOLECULAR ORIENTATIONAL GLASSES WITH INDIRECT INTERACTION

The general regularities of the behaviour of heat capacity and thermal expansion of solutions Of substances With simple linear molecules in solidified inert gases at concentrations of about 1 mol % when the dir ect quadrupole interaction between impurities does not play an importa nt role are discussed. In such solutions indirect (static and dynamic) interactions between impurity molecules (rotators) are dominant, The static interactions are realized through deformation fields produced b y impurities in a lattice. The dynamic ones are performed by the phono n exchange between impurity molecules. Under certain conditions the in direct interactions mentioned lead to stochasticity of an enegy spectr um of the subsystem of rotators and the appearance of an orientational glass-libe state, Special attention is paid to the behaviour of the s ystems in Which an energy spectrum of rotational motion of impurity mo lecules is determined by intramolecular degrees of freedom. The experi mental results of the studies of thermal properties of N-2 and O-2 in solid Ar and Kr are presented.