Giant room temperature elastocaloric effect of PbTiO3 ferroelectric materials with 90° domain structure. Issue 74 (27th July 2016)

• Record Type: Journal Article
• Authors: Wang, F.; Li, B.; Ou, Y.; Liu, L. F.; Peng, C. Z.; Wang, Z. S.; Wang, W.
• Is Part Of: RSC advances. Volume 6:Issue 74(2016)
• Page Start: 70557
• Page End: 70562
• Publication Date: 2016-07-27
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra13030e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The elastocaloric effect in PbTiO3 with 90° domain structure under the applied stress field at room temperature has been studied. A negative Δ Tσ of −7.2 K can be obtained by controlled polarization switching under the applied stress fields. Abstract : The influence of domain structures and domain switching on the elastocaloric effect in PbTiO3 (PTO) with 90° domain structure under the applied stress field at room temperature has been studied using a phase field model. The calculation results indicate that both positive and negative elastocaloric effects can be obtained depending on the directions of the applied stress. The adiabatic temperature change (Δ T σ ) almost linearly increases with increase of the applied uniaxial stress fields, and the largest value of negative Δ T σ is about −3.8 K which was obtained at the tensile stress field of about 2 GPa. Moreover, a negative Δ T σ with the magnitude of −7.2 K can be obtained by controlled polarization switching under the applied stress fields. These results provide an efficient way to obtain a large elastocaloric effect in ferroelectric materials through domain engineering at room temperature.