在工程ZrO2-LSMO层结构中稳定了β角扭曲的抗铁电
Jiasheng Guo1, Lei Tao2, Jingkun Gu1
1State Key Laboratory of New Ceramic Materials, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
Advanced materials (Deerfield Beach, Fla.)
|October 18, 2025
概括
现在可以稳定表轴化膜中的抗铁电. 研究人员通过在ZrO2膜中诱导β角扭曲来实现这一目标,从而为储能设备开辟了新的路径.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 薄膜技术 薄膜技术
背景情况:
- 由于其CMOS兼容性,化物结构薄膜对于铁/反铁电应用至关重要.
- 在表轴化物中稳定抗铁电性是一个重大挑战,阻碍了基本的理解和设备开发.
研究的目的:
- 为了稳定ZrO2-LSMO层结构中的抗铁电Pbca相.
- 调查格子扭曲在稳定反铁电的作用.
- 为了建立ZrO2表轴膜的相位稳定性图.
主要方法:
- 在LSAT (110) 基板上ZrO2-LSMO层结构的生长.
- 使用实验技术和密度函数理论 (DFT) 分析格子扭曲.
- 在各种应变条件下开发ZrO2表轴膜的相稳定性图.
主要成果:
- 在ZrO2-LSMO薄膜中成功稳定了抗铁电Pbca相.
- 证明Pbca和Pca21阶段之间的可逆和非挥发性相位过渡.
- 确定β角扭曲作为稳定Pbca阶段和控制其过渡的关键因素.
结论:
- 带有可控位移的长轴接口可以稳定化物系统中的反铁电.
- β角扭曲是设计ZrO2膜中的抗铁电特性的一个可调节参数.
- 这项工作为优化基于氧化的信息和能量存储设备开辟了新的途径.
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