Memory effect in triglycine sulfate induced by a transverse electric   field: specific heat measurement
  The influence of a transverse electric field in the specific heat of triglycine sulphate (TGS) has been studied. The specific heat of TGS has been measured heating the sample from ferroelectric to paraelectric phase after prolonged transverse electric field (i.e. perpendicular to the ferroelectric axis). It is shown that the specific heat of TGS can remember the temperature $T_s$ at which the transverse field was previously applied. 
M C Gallardo, J M Martin-Olalla, F J Romero, J del Cerro, B Fugiel