Theoretical investigations on thermopolarization properties and prediction of giant electrocaloric effect of ferroelectric SnTiO3

The electrocaloric effect (ECE) of Tin Titanate (SnTiO3) has been investigated in the present manuscript. A phenomenological model has been adopted for predicting electric polarization variation with temperature to examine electrocaloric properties such as entropy change, heat capacity change and relative cooling power. The results indicate the potential of this ferroelectric compound to achieve the ECE near Curie temperature (TC). It is useful as prospective candidate for cooling system in a wide temperature interval. The maximum change in entropy near TC obtained by phenomenological model has been compared with the value procured by Tarnaoui et al. [1 M. Tarnaoui et al., Elastic, electronic and electrocaloric properties near room temperature in Mn-doped SnTiO3 from first-principles calculations, Ceram. Int. 46 (14), 21995 (2020). DOI: 10.1016/j.ceramint.2020.05.147.[Crossref], [Web of Science ®] , [Google Scholar]]. The results confirm that the phenomenological model is undoubtedly beneficial for the prediction of the electrocaloric effect of ferroelectric materials.