Temperature dependent electrocaloric performances in Pb0.97La0.02(Hf0.92Ti0.08)O3 antiferroelectric ceramic with triple phase structures DOI

Mengjiao Yu,

D. Wu,

Changshun Dai

et al.

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 125(22)

Published: Nov. 25, 2024

Antiferroelectric–ferroelectric phase transition in antiferroelectric (AFE) materials usually triggers high-performance electrocaloric effect (ECE), as represented by PbZrO3-based AFE. As an isostructure to PbZrO3, EC research PbHfO3-based AFE ceramics are significantly left out. In this work, temperature dependent performances Pb0.97La0.02(Hf0.92Ti0.08)O3 with typical features explored, and rhombohedral ferroelectric (FER), AFE1 (A1, Pbam), AFE2 (A2, Imma) triple phases induced increases. This leads dual coexisting regions FER-to-A1 A1-to-A2 at a of ∼20 °C ∼100 °C, respectively, where local maxima produced ΔT ∼0.06 K ∼0.16 (E = 70 kV/cm). These certified comprehensive characterizations situ x-ray diffractometer, electrical properties, Raman spectra analysis. strongly indicates that (Pbam)-to-AFE (Imma) could efficiently optimize ECE AFE, addition the conventional understandings FE–paraelectric AFE–paraelectric modulation strategy. work not only presents potential solid-state cooling applications but also serves catalyst for further seeking high-EC materials.

Language: Английский

Tunable and anomalous electrocaloric behaviors in Bi0.5Na0.5TiO3-based relaxor enabled by dynamics of polar nanoregions DOI
Feng Li, Xuan Wang, Mingsheng Long

et al.

Acta Materialia, Journal Year: 2025, Volume and Issue: 293, P. 121093 - 121093

Published: April 29, 2025

Language: Английский

Citations

0
Temperature dependent electrocaloric performances in Pb0.97La0.02(Hf0.92Ti0.08)O3 antiferroelectric ceramic with triple phase structures DOI

Mengjiao Yu,

D. Wu,

Changshun Dai

et al.

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 125(22)

Published: Nov. 25, 2024

Antiferroelectric–ferroelectric phase transition in antiferroelectric (AFE) materials usually triggers high-performance electrocaloric effect (ECE), as represented by PbZrO3-based AFE. As an isostructure to PbZrO3, EC research PbHfO3-based AFE ceramics are significantly left out. In this work, temperature dependent performances Pb0.97La0.02(Hf0.92Ti0.08)O3 with typical features explored, and rhombohedral ferroelectric (FER), AFE1 (A1, Pbam), AFE2 (A2, Imma) triple phases induced increases. This leads dual coexisting regions FER-to-A1 A1-to-A2 at a of ∼20 °C ∼100 °C, respectively, where local maxima produced ΔT ∼0.06 K ∼0.16 (E = 70 kV/cm). These certified comprehensive characterizations situ x-ray diffractometer, electrical properties, Raman spectra analysis. strongly indicates that (Pbam)-to-AFE (Imma) could efficiently optimize ECE AFE, addition the conventional understandings FE–paraelectric AFE–paraelectric modulation strategy. work not only presents potential solid-state cooling applications but also serves catalyst for further seeking high-EC materials.

Language: Английский

Citations

0