Anisotropy of the Electrocaloric Effect in Lead-Free Relaxor Ferroelectrics
Journal article published in 2014 by
F. Le Goupil 
,
Anna‐Karin-K. Axelsson,
Lj Dunne,
Matjaz Valant,
George Manos ,
Tadeusz Lukasiewicz,
Jan Dec ,
Andrey Berenov,
Neil M.-C.-Nm Alford
,
Anna‐Karin-K. Axelsson,
Lj Dunne,
Matjaz Valant,
George Manos ,
Tadeusz Lukasiewicz,
Jan Dec ,
Andrey Berenov,
Neil M.-C.-Nm Alford
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Abstract
The highly anisotropic electrocaloric effect, evidenced by both direct measurements and a descriptive theoretical model in lead-free relaxor ferroelectric Sr0.75Ba0.25Nb2O6 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.