Giant Negative Electrocaloric Effects of Hf0.5Zr0.5O2 Thin Films. Issue 36 (4th July 2016)

• Record Type: Journal Article
• Authors: Park, Min Hyuk; Kim, Han Joon; Kim, Yu Jin; Moon, Taehwan; Kim, Keum Do; Lee, Young Hwan; Hyun, Seung Dam; Hwang, Cheol Seong
• Is Part Of: Advanced materials. Volume 28:Issue 36(2016)
• Page Start: 7956
• Page End: 7961
• Publication Date: 2016-07-04
• Subjects: ferroelectricity -- negative electrocaloric effect -- solid‐state cooling -- thin films -- hafnia; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201602787
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract : Hafnia (HfO2 )‐zirconia (ZrO2 ) 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.