反铁电材料中负电卡效应的研究进展
吴明1(
), 肖娅男1, 李华强1, 刘泳斌1, 高景晖1(), 钟力生1, 娄晓杰2
), 肖娅男1, 李华强1, 刘泳斌1, 高景晖1(), 钟力生1, 娄晓杰2
Negative Electrocaloric Effects in Antiferroelectric Materials: a Review
WU Ming1(), XIAO Yanan1, LI Huaqiang1, LIU Yongbin1, GAO Jinghui1(), ZHONG Lisheng1, LOU Xiaojie2
), XIAO Yanan1, LI Huaqiang1, LIU Yongbin1, GAO Jinghui1(), ZHONG Lisheng1, LOU Xiaojie2
图1. 电卡效应冷却循环中的极化翻转、温度变化和熵变示意图
Fig. 1. Schematic of polarization switching, temperature change and entropy change during cooling cycle of electrocaloric effect
(a) In virgin state, the ferroelectric polarization randomly distributs; (b) With the application of electric field, the ferroelectric polarization is aligned, and the temperature of the ferroelectric materials is increased; (c) After an isothermal process, the temperature of the ferroelectric materials decreases to the environment temperature; (d) After removal of the electric field, the ferroelectric polarization recovers randomly distribution, the temperature of the ferroelectric materials decreases
