title: Giant Negative Electrocaloric Effects of Hf0.5Zr0.5O2Thin Films.
abstract: 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.
authors.affiliation: Department of Materials Science & Engineering and Inter-University Semiconductor Research Center, College of Engineering, Seoul National University, Seoul, 151-744, Republic of Korea.
authors.forename: Min Hyuk
authors.initials: MH
authors.lastname: Park
authors.affiliation: Department of Materials Science & Engineering and Inter-University Semiconductor Research Center, College of Engineering, Seoul National University, Seoul, 151-744, Republic of Korea.
authors.forename: Han Joon
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Department of Materials Science & Engineering and Inter-University Semiconductor Research Center, College of Engineering, Seoul National University, Seoul, 151-744, Republic of Korea.
authors.forename: Yu Jin
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: Department of Materials Science & Engineering and Inter-University Semiconductor Research Center, College of Engineering, Seoul National University, Seoul, 151-744, Republic of Korea.
authors.forename: Taehwan
authors.initials: T
authors.lastname: Moon
authors.affiliation: Department of Materials Science & Engineering and Inter-University Semiconductor Research Center, College of Engineering, Seoul National University, Seoul, 151-744, Republic of Korea.
authors.forename: Keum Do
authors.initials: KD
authors.lastname: Kim
authors.affiliation: Department of Materials Science & Engineering and Inter-University Semiconductor Research Center, College of Engineering, Seoul National University, Seoul, 151-744, Republic of Korea.
authors.forename: Young Hwan
authors.initials: YH
authors.lastname: Lee
authors.affiliation: Department of Materials Science & Engineering and Inter-University Semiconductor Research Center, College of Engineering, Seoul National University, Seoul, 151-744, Republic of Korea.
authors.forename: Seung Dam
authors.initials: SD
authors.lastname: Hyun
authors.affiliation: Department of Materials Science & Engineering and Inter-University Semiconductor Research Center, College of Engineering, Seoul National University, Seoul, 151-744, Republic of Korea. cheolsh@snu.ac.kr.
authors.forename: Cheol Seong
authors.initials: CS
authors.lastname: Hwang
keywords: ferroelectricity; hafnia; negative electrocaloric effect; solid-state cooling; thin films