Giant Negative Electrocaloric Effects of Hf<sub>0.5sub>Zr<sub>0.5sub>O<sub>2sub> Thin Films
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- 作者：Min Hyuk Park ; Han Joon Kim ; Yu Jin Kim ; Taehwan Moon ; Keum Do Kim ; Young Hwan Lee ; Seung Dam Hyun and Cheol Seong Hwang
- 刊名：Advanced Materials
- 出版年：2016
- 出版时间：September 28, 2016
- 年：2016
- 卷：28
- 期：36
- 页码：7956-7961
- 全文大小：305K
- ISSN：1521-4095
文摘
Hafnia (HfO<sub>2sub>)-zirconia (ZrO<sub>2sub>) 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.