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
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Sprache:eng
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ferroelectricity
hafnia
negative electrocaloric effect
solid-state cooling
thin films
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container_end_page 7961
container_issue 36
container_start_page 7956
container_title Advanced materials (Weinheim)
container_volume 28
creator Park, Min Hyuk
Kim, Han Joon
Kim, Yu Jin
Moon, Taehwan
Kim, Keum Do
Lee, Young Hwan
Hyun, Seung Dam
Hwang, Cheol Seong
description 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.
doi_str_mv 10.1002/adma.201602787
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subjects ferroelectricity
hafnia
negative electrocaloric effect
solid-state cooling
thin films
title Giant Negative Electrocaloric Effects of Hf0.5Zr0.5O2 Thin Films
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