Towards multicaloric effect with ferroelectrics

Yang Liu, Guangzu Zhang, Qi Li, Laurent Bellaiche, James F. Scott, Brahim Dkhil, Qing Wang

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Utilizing thermal changes in solid state materials strategically offers caloric-based alternatives to replace current vapor-compression technology. To make full use of multiple forms of the entropy and achieve higher efficiency for designs of cooling devices, the multicaloric effect appears as a cutting-edge concept encouraging researchers to search for multicaloric materials with outstanding caloric properties. Here we report the multicaloric effect in BaTiO3 single crystals driven simultaneously by mechanical and electric fields and described via a thermodynamic phenomenological model. It is found that the multicaloric behavior is mainly dominated by the mechanical field rather than the electric field, since the paraelectric-to-ferroelectric transition is more sensitive to mechanical field than to electric field. The use of uniaxial stress competes favorably with pressure due to its much higher caloric strength and negligible elastic thermal change. It is revealed that multicaloric response can be significantly larger than just the sum of mechanocaloric and electrocaloric effects in temperature regions far above the Curie temperature but cannot exceed this limit near the Curie temperature. Our results also show the advantage of the multicaloric effect over the mechanically-mediated electrocaloric effect or electrically-mediated mechanocaloric effect. Our findings therefore highlight the importance of ferroelectric materials to develop multicaloric cooling.
Original languageEnglish
Article number214113
Number of pages7
JournalPhysical Review. B, Condensed matter and materials physics
Issue number21
Publication statusPublished - 27 Dec 2016


Dive into the research topics of 'Towards multicaloric effect with ferroelectrics'. Together they form a unique fingerprint.

Cite this