Antiferroelectric and lead-free ferroelectric materials as electrocaloric coolants

Brigita Rozic ¹, Bouchra Asbani ³, Hana Ursic ¹, Mimoun El Marssi ³, Rasa Pirc ¹, Jurij Koruza ^{1, 2}, Barbara Malic ¹, Zdravko Kutnjak ¹

¹ Jožef Stefan Institute, Jamova cesta 39,, Ljubljana, Slovenia
² Technische Universität Darmstadt, Alarich-Weiss-Str. 2, Darmstadt, Germany
³ LPMC, University of Picardie Jules Verne, 33 rue Saint-Leu, Amiens, France

The electrocaloric (EC) effect has recently attracted significant interest for developing new heat-management devices that have the potential to replace the existing technologies [1,2]. In this contribution the direct measurements of the large EC effect in antiferroelectric and lead-free ferroelectric materials [3,4] will be presented. Specifically, the negative EC effect in antiferroelectric n/95/5 PLZT and PBZ ceramics will be investigated by direct experiments. Here, it is demonstrated that both negative and positive EC response can be arbitrarily invoked in antiferroelectric materials by properly controlling the electric field and temperature. In addition, the large positive EC response observed by direct experiments in lead-free BCTZ-based ferroelectric materials will be reviewed.

References

[1] Z. Kutnjak., B. Rožič, R. Pirc., Wiley Encyclopedia of Electrical and Electronics Engineering, p. 1-19 (2015).

[2] A. S. Mischenko et al., Science 311, 1270 (2006).

[3] R. Pirc, B. Rožič, J. Koruza, G. Cordoyiannis, B. Malič, Z. Kutnjak, J. Phys.:Condens.Matter 27, 455902 (2015).

[4] B. Asbani, J.-L. Dellis, A. Lahmar, M. Courty, M. Amjoud, Y. Gagou, K. Djellab, D. Mezzane, Z. Kutnjak, M. El Marssi, Appl. Phys. Lett. 106, 042902 (2015).

Reference:

Tu-S27-O-01

Presenter/s:

Brigita Rozic

Presentation type:

Oral communication

Room:

Room4

Chair/s:

Avadh Saxena

Date:

Tuesday, September 5th, 2017

Time:

14:45 - 15:00

Session times:

14:45 - 16:20

IMF2017