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阶段共存诱导了PbZrO₃Epitaxial薄膜中的巨型介电可调性和电机械反应

Wanli Zhang^1,2, Xinpeng Mou³, Yunpeng Ma¹

¹State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.

Small (Weinheim an der Bergstrasse, Germany)

|January 17, 2025

概括

研究人员在氧化 (PbZrO3) 薄膜中发现了一个中间阶段,这对于理解反铁电到铁电过渡至关重要. 这一发现揭示了先进可调和纳米电子机械设备的潜力.

科学领域:

材料科学材料科学材料科学
凝聚物质物理学凝聚物质物理学
固态化学固态化学

背景情况:

氧化 (PbZrO3) 薄膜是具有显著介电和电机性能的经典抗铁电材料.
对抗铁电 (AFE) 到铁电 (FE) 阶段过渡的基本理解,特别是中间阶段,仍然不完整.

研究的目的:

调查在表轴性PbZrO3薄膜中AFE到FE过渡期间存在和性质的中间阶段.
为了将宏观性质与微观相位行为和理论预测相关联.

主要方法:

具有不同厚度 (16-110 nm) 的PbZrO3薄膜的表轴生长.
使用介电光谱学进行宏观表征 (肩介电行为).
通过高角度环状暗场扫描传输电子显微镜 (HAADF-STEM) 进行显微镜分析.
第一个原则计算模型阶段过渡.

主要成果:

观察一个正方形AFE阶段和一个四角形 (T型) 阶段之间的相位共存.
识别具有特定双极排列的中间阶段 (垂直对角上上下下).
证明了超高的介电可调性 (90.1%在49纳米薄膜中) 和显著的电机应变 (0.66%在59纳米薄膜中).
在电容-电场 (ɛr-E) 曲线中,中间相与不寻常的介电峰的相关性.

结论:

该研究证实了在PbZrO3薄膜中AFE到FE过渡期间的中间阶段.
这个中间阶段负责独特的介电行为,并提高了材料性能.
这些发现促进了对抗铁电相变的基本理解,并突出了新型设备应用的潜力.

关键词:

这就是PbZrO3的含量.抗铁电气制品抗铁电气制品介电可调性介电可调性中间阶段是中间阶段.阶段过渡阶段过渡

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