增强短距离相互作用以扩大反铁电和铁弹性的共存温度范围
Zhuoer Cai1, Yinan Zhang1, Xiaofan He1
1School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|August 6, 2024
概括
研究人员发现了新的抗铁电 (AFE) 和铁弹性材料. 混合矿中的素替代扩大了共存温度范围,推动了多功能材料的开发.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 晶体学 晶体学是指结晶学.
背景情况:
- 反铁电 (AFE) 材料表现出双电歇斯底里循环,并在电场下转化为铁电 (FE) 阶段,显示出储能和制冷的潜力.
- AFE材料显示取决于电场方向的场诱导应变,这是一个特征性的切换行为.
- 很少报道AFE和铁弹性的共存,这限制了多功能材料的开发.
研究的目的:
- 调查新型有机-无机混合矿中抗铁电 (AFE) 和铁弹性性质的共存.
- 探索素替代对这些材料相变和性质的影响.
- 扩大用于先进电子应用的多功能材料库.
主要方法:
- 合成和描述两个同型有机-无机混合矿:HDAEPbCl4和HDAEPbBr4.
- 铁电-反铁电-电 (FE-AFE-PE) 阶段过渡的研究.
- 对AFE和铁弹性的温度依赖共存范围的分析,重点关注素替代的影响.
主要成果:
- 合成了HDAEPbCl4和HDAEPbBr4,表现出FE-AFE-PE相位过渡.
- 素替代显著扩大了AFE和铁弹性共存的温度范围,从59.9K扩大到115.1K.
- 通过素替代强化短距离力量被确定为扩大共存范围的机制.
结论:
- 这项研究提出了新的AFE和铁弹性混合矿,HDAEPbCl4和HDAEPbBr4.
- 素替代有效地提高了AFE和铁弹性的共存在一个扩展的温度范围.
- 这项工作有助于开发用于储能,制冷和其他先进电子应用的多功能材料.
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