Contribution of the lst kind phase transition smearing due to impurities to heat capacity of condensed systems

摘要

An expression describing the contribution of the lst kind phase transition smearing due to impurities to heat capacity of condensed systems has been derived under a simple model approximation (weak binary solutions, equilibrium distribution of impurities). The model proposed has been observed to agree qualitatively with experimental data for phase transitions in simple molecular crystals (CF_4,CCl_4 - crystal-crystal transitions) and in liquid crystals (LC) (MBBA, BMOAB - nematic LC-istropic liquid transitions).