The thermal conductivity of BaTiO3 in the neighbourhood of its ferroelectric transition temperatures

Abstract

The thermal conductivity of single crystalline BaTiO3 has been measured in the temperature range of 100–500°K. In the neighbourhood of the transition temperature a reduction of the thermal conductivity is observed. This result can be explained in view of a current theory on ferroelectricity which introduces the concept of low frequency ferroelectric modes of lattice vibration.