Effect of Electric Field on Ferroelectric Phase Transition in BaTiO3 Ferroelectric

The effect of electric field on the paraelectric-to-ferroelectric phase transition has been studied by quasi-isothermal calorimetric measurements on the classical ferroelectric BaTiO3 (BTO) single crystal oriented in the [001] direction. The isothermal response of BTO exhibits a hysteresis at the field induced phase transition, however on approaching the critical point the asymmetry of the transition vanishes. The experimentally determined E-T phase diagram also shows a weak effect of the applied electric field on transition temperature at lower fields, whereas at higher fields the effect of the field becomes stronger.