Giant Negative Electrocaloric Effects of Hf0.5Zr0.5O2 Thin Films

Giant Negative Electrocaloric Effects of Hf0.5Zr0.5O2 Thin Films

Hafnia (HfO2)‐zirconia (ZrO2) solid solution films show giant positive (ΔT = 13.4 K) and negative (ΔT = −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, si...

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Veröffentlicht in:Advanced materials (Weinheim) 2016-09, Vol.28 (36), p.7956-7961
Hauptverfasser: Park, Min Hyuk, Kim, Han Joon, Kim, Yu Jin, Moon, Taehwan, Kim, Keum Do, Lee, Young Hwan, Hyun, Seung Dam, Hwang, Cheol Seong
Format: Artikel
Sprache:eng
Schlagworte:
ferroelectricity
hafnia
negative electrocaloric effect
solid-state cooling
thin films
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Zusammenfassung:Hafnia (HfO2)‐zirconia (ZrO2) solid solution films show giant positive (ΔT = 13.4 K) and negative (ΔT = −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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201602787