A wide temperature range photoacoustic cell for the study of phase transitions in solids: an application to the ferroelectric-incommensurate (N(CH3)4)2CoCl4

Abstract
A resonant photoacoustic cell which allows for amplitude and phase measurements over a wide temperature range is described. Photoacoustic measurements prove to be highly sensitive for the study of phase transitions in solids as well as the behaviour of the thermal conductivity. An application to the ferroelectric-incommensurate (N(CH3)4)2CoCl4 is carried out.