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Anisotropy of the Electrocaloric Effect in Lead‐Free Relaxor Ferroelectrics
Author(s) -
Goupil Florian Le,
Axelsson AnnaKarin,
Dunne Lawrence J.,
Valant Matjaz,
Manos George,
Lukasiewicz Tadeusz,
Dec Jan,
Berenov Andrey,
Alford Neil McN.
Publication year - 2014
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201301688
Subject(s) - electrocaloric effect , materials science , relaxor ferroelectric , anisotropy , condensed matter physics , refrigeration , pyroelectricity , polar , lead (geology) , ferroelectricity , ceramic , optoelectronics , thermodynamics , optics , dielectric , composite material , physics , astronomy , geomorphology , geology
The highly anisotropic electrocaloric effect, evidenced by both direct measurements and a descriptive theoretical model in lead‐free relaxor ferroelectric Sr 0.75 Ba 0.25 Nb 2 O 6 single crystals, can be exploited by producing low‐cost grain‐oriented ceramics. Combined with the broad‐temperature‐range cooling regime provided by their polar nanoregions, these materials may be the key to future cost‐ and energy‐efficient solid‐state refrigeration.