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ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.30 No.9 pp.480-488

Electrocaloric Effect in Emerging Fluorite-Structure Ferroelectrics

Kun Yang*,Ju Yong Park*,Dong Hyun Lee*,Min Hyuk Park
School of Materials Science and Engineering, Pusan National University, 2, Busandaehak-ro-63-beongil, Geumjeong-gu, Busan 46241, Republic of Korea
Corresponding author E-Mail : (M. H. Park, Pusan Nat'l Univ.) *These authors equally contributed to this work.


The electrocaloric effect can be observed in pyroelectric materials based on conversion between electrical and thermal energy, and can be utilized for the future environment-friendly refrigeration technology. Especially, a strong electrocaloric effect is expected in materials in which field-induced phase transition can be achieved. Emerging fluoritestructure ferroelectrics such as doped hafnia and zirconia, first discovered in 2011, are considered the most promising materials for next-generation semiconductor devices. Besides application of fluorite-structure ferroelectrics for semiconductor devices based on their scalability and CMOS-compatibility, field-induced phase transition has been suggested as another interesting phenomenon for various energy-related applications such as solid-state cooling with electrocaloric effect as well as energy conversion/storage and IR/piezoelectric sensors. Especially, their giant electrocaloric effect is considered promising for solid-state-cooling. However, the electrocaloric effect of fluorite-structure oxides based on field-induced phase transition has not been reviewed to date. In this review, therefore, the electrocaloric effect accompanied by field-induced phase transition in fluorite-structure ferroelectrics is comprehensively reviewed from fundamentals to potential applications.

새로운 플루오라이트 구조 강유전체의 Electrocaloric Effect

부산대학교 재료공학부