The search for alternative solid-state refrigeration materials to hazardous gases in conventional and cryogenic cooling devices is a very active field of condensed matter [1,2]. The use of phase transitions is a powerful tool to achieve giant caloric effects in ferroic materials in which magnetization, polarization, strain and/or volume can be strongly tuned under a moderate external stimulus. Here, we explored various strategies to reveal ferroelectric potentialities as solid state coolers such as multiphase points composition, elasto- and baro-caloric responses, negative electrocaloric effect in antiferroelectrics as well as the use of dual-stimuli by taking advantage of multicaloric effects combining stress and electric field in ferroelectrics or magnetic and electric fields in multicalorics [3-7].
B.D. acknowledge Fonds National de la Recherche (FNR) du Luxembourg through the InterMobility project 16/1159210 "MULTICALOR"
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[2] T. Correia and Q. Zhang (Eds.). Electrocaloric Materials, Springer: Berlin (2014).
[3] Y. Liu, J.F. Scott, B. Dkhil, APL Materials 4, 064109 (2016).
[4] Y. Liu, B. Dkhil, E. Defay, ACS Energy Lett. 1, 521 (2016).
[5] Y. Liu, L. C. Phillips, M. Bibes, A. Barthélémy, B. Dkhil, Nat. Comm. 7, 11614 (2016).
[6] Y. Liu, J.F. Scott, B. Dkhil, Appl. Phys. Reviews 3, 031102 (2016).
[7] Y. Liu, G. Zhang, Q. Li, L. Bellaiche, J.F. Scott, B. Dkhil, Q. Wang, Phys. Rev. B 94, 214113 (2016).