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Giant Negative Electrocaloric Effects of Hf 0.5 Zr 0.5 O 2 Thin Films
Author(s) -
Park Min Hyuk,
Kim Han Joon,
Kim Yu Jin,
Moon Taehwan,
Kim Keum Do,
Lee Young Hwan,
Hyun Seung Dam,
Hwang Cheol Seong
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201602787
Subject(s) - materials science , cubic zirconia , service (business) , oxide , perovskite (structure) , simple (philosophy) , chemical engineering , ceramic , metallurgy , economics , engineering , philosophy , epistemology , economy
Hafnia (HfO 2 )‐zirconia (ZrO 2 ) solid solution films show giant positive (Δ T = 13.4 K) and negative (Δ T = −10.8 K) electrocaloric effects that can be simply controlled by tuning the Hf/Zr ratio. It is expected that the combination of the electrocaloric effects with opposite signs in this lead‐free, simple, binary oxide can significantly improve the efficiency of electrocaloric cooling.