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混合MBE路径到BaTiO₃膜的吸附控制增长,具有强大的极化切换

Sooho Choo¹, Shivasheesh Varshney¹, Jay Shah¹

¹Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States.

|December 1, 2025

概括

我们开发了一种合成单晶铁电酸 (BaTiO3) 膜的新方法. 这些膜显示出有前途的铁电特性,可用于灵活的电子和内存应用.

科学领域:

材料科学材料科学材料科学
固态物理固态物理
纳米技术纳米技术

背景情况:

独立的铁电膜对于灵活的电子和非挥发性存储器等先进应用至关重要.
合成这些膜具有精确的静态测量控制和可重现性仍然是一个重大挑战.

研究的目的:

为了展示一种新的合成单晶,表层酸 (BaTiO3) 膜的新方法.
描述合成膜的结构,介电和铁电性质.

主要方法:

使用混合分子束表 (MBE) 的BaTiO3膜的吸附控制生长.
用于膜制造的水滴升起技术.
高分辨率的X射线衍射,拉曼光谱,阻抗光谱和压响应力显微镜 (PFM).

主要成果:

成功获得了亚毫米到毫米大小的单晶BaTiO3膜.
确认了强大的四边形对称性和高介电常数 (∼1340).
证明了铁电功能,其残余极化为≤5μC cm−2和强制场为≤63 kV cm−1.1.

结论:

吸附控制的MBE生长和水滴提升方法使高质量的铁电BaTiO3膜的可重复合成成为可能.
这些膜具有出色的结构完整性和铁电性质,使其适用于灵活的电子设备.

关键词:

拉曼光谱法拉曼光谱法拉曼光谱法通过吸附控制的增长.阴离体静脉测量法 (cation stoichiometry) 是一种测量方法.铁电是铁电的发电源.一个独立的氧化物薄膜薄膜.混合型的MBE可以使用.

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